United States 

Department of

Agriculture

Forest Service

R 10-MB-736

October 2012 

 

Big Thorne Project

Thorne Bay Ranger District, 

Tongass National Forest

Draft Environmental 

Impact Statement

Volume IV - Unit Cards (Units 121-476) 
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs 

and activities on the basis of race, color, national origin, age, disability, and where 

applicable, sex, marital status, familial status, parental status, religion, sexual 

orientation, genetic information, political beliefs, reprisal, or because all or part of an 

individual’s income is derived from any public assistance program. (Not all prohibited 

bases apply to all programs.) Persons with disabilities who require alternative means 

for communication of program information (Braille, large print, audiotape, etc.) should 

contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). 

To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 

1400 Independence Avenue, S.W., Washington, D.C. 20250-9410, or call (800) 795-

3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and 

employer.
Unit 121

Total Unit

Acres:

2, 3 - 50.6

4 - 52.6

5 - 50.7

Prescription: 2, 3, 5 - Clearcut

4 - 50% Removal

VCU

Number:

579 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 1,020

4 - 531

5 - 1,023

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock in the lower 

elevations and mountain hemlock in the upper elevations. Alaska-cedar and Sitka spruce are more abundant in the lower 

elevations. Stem decay is high to moderate occurrence across the unit. In the western and mountain hemlock, defect and 

damages are high with high to very high stem decay and light mistletoe. Windthrow risk is moderate. All previous harvest 

areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for 

no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3, 5)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 22 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The required legacy 

structure is planned to coincide with areas dropped for soils concerns, as well as isolated areas with difficult yarding. 

Mapped legacy represents about 22 acres. Any adjustments to the planned unit during implementation must consider the 

planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for a combination of helicopter and cable yarding. Cable settings are planned for uphill 

and downhill yarding to landings on the proposed temporary road. Helicopter settings are planned for yarding to landings on 

existing NFS road 3015635 and proposed temporary road. 

Alternatives 4, 5: This unit is planned for helicopter yarding to the existing NFS road 3015635.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1200 feet, as displayed on the unit card.

 BOTANY:

No Concerns

Unit

Number 121 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation
Unit 121

 FISHERIES:

Streams are tributaries to Gravelly Creek. 

Stream#: 1.1L Class: I, II, III Flagging: B/W, O/W C- Type: MMS, HCL, HCD, HCM

Concerns: blowdown and active erosion

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for HCL and HCD and Class II for HCD greater of 100 feet or to the top of the side-slope break. Class III for 

HCD and HCM to the top of the side-slope break.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category A and B 

Stream#: 1.1L.2R Class: I, IV Flagging: B/W, G/W C- Type: PAB, HCO

Concerns: none 

Buffer (RMA): Class I for PAB greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 1.2L.1L Class: I, III, IV Flagging: B/W, O/W, G/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for HCO greater of 100 feet or to the top of the side-slope break. Class III for HCO to the top of the side-slope 

break. Class IV for HCO none.

Alternatives 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A, B and C 

Stream#: 1.2L.1L.2L Class: III, IV Flagging: O/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class III for HCO to the top of the side-slope break. Class IV for HCO none

Alternatives 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 1.2L Class: I, III, IV Flagging: B/W, O/W, G/W C- Type: HCLw, HCM, HCO

Concerns: none

Buffer (RMA): Class I for HCLw greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. Class IV for HCO none.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A, B and C

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 121: Alternatives 2 and 3 -- 1 Class III stream crossing . If any additional stream crossings are 

found, crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, 

prior to construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, 

and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Timber Production LUD and is considered Not 

Seen. There are no scenery resource concerns.

 INVASIVE SPECIES:

No Concerns
Unit 121

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from nearly level to greater than 72%. Less than 2 acres of slopes greater than 72% occur near the center of 

the unit. Partial cut and a minimum of partial suspension are required on these steep slopes. About 15 acres were excluded 

from harvest due to high landslide potential, present and historic landslides and steep slopes. In the remaining unit, a 

minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

Based GIS analysis, there are approximately 20 acres (40% of the unit) of forested wetland near the center of the western 

unit boundary and in the eastern portion of the site.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; Legacy acres 

cover some deer winter range.

Alternative 4: Helicopter yarding with 50% basal area removal to maintain connectivity and other habitat values in the 

Gravelly Creek Drainage. No Legacy acres required because adequate structure retained in unit under uneven-aged harvest 

prescription (i.e., no openings larger than 20 acres).
3015635

2

1. 1 L.1

1.1L.2R

L

1.1L

1.2L

1.2L

1.3L

1.2L. 1

L

2. L

1.2L.1L

1.1L

1.1L.4L 1.1L.5L

1.1L.6R

1.1L.3R

1 3. L.4L

1.1L.1 L .1L

1.1L.2R

1.1L.6R.1R

1.2L.1L.1L

1.1L.6R.2R

2.1R 1. L

1.1L.7R

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.1L.6R

1.2L .1L

1996

1993

122

122

121

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 121 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3015635

1. 1 L.1

1.1L.2R

L

1.1L

1.2L

1.2L

1.3L

1.2L. 1

L

2. L

1.2L.1L

1.1L

1.1L.4L 1.1L.5L

1.1L.6R

1.1L.3R

1 3. L.4L

1.1L.1 L .1L

1.1L.2R

1.1L.6R.1R

1.2L.1L.1L

1.1L.6R.2R

2.1R 1. L

1.1L.7R

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.1L.6R

1.2L .1L

2

1996

1993

122

121

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 121 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3015635

2

1. 1 L.1

1.1L.2R

L

1.1L

1.2L

1.2L

1.3L

1.2L. 1

L

2. L

1.2L.1L

1.1L

1.1L.4L 1.1L.5L

1.1L.6R

1.1L.3R

1 3. L.4L

1.1L.1 L .1L

1.1L.2R

1.1L.6R.1R

1.2L.1L.1L

1.1L.6R.2R

2.1R 1. L

1.1L.7R

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.1L.6R

1.2L .1L

1996

1993

122

122

121

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 121 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3015635

2

1. 1 L.1

1.1L.2R

L

1.1L

1.2L

1.2L

1.3L

1.2L. 1

L

2. L

1.2L.1L

1.1L

1.1L.4L 1.1L.5L

1.1L.6R

1.1L.3R

1 3. L.4L

1.1L.1 L .1L

1.1L.2R

1.1L.6R.1R

1.2L.1L.1L

1.1L.6R.2R

2.1R 1. L

1.1L.7R

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.1L.6R

1.2L .1L

1996

1993

122

122

121

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 121 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 122

Total Unit

Acres:

18.9 Prescription: Clearcut

VCU

Number:

579 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

260

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: The unit has old-growth stand structure. The overstory consists primarily of western hemlock with Alaskacedar and Sitka spruce. Stem decay is high to moderate across the unit. Mistletoe is light. Windthrow risk is moderate. All 

previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for a combination of cable, shovel, and helicopter yarding. Cable settings are planned for uphill yarding 

to landings on the existing NFS road 3015635. Shovel settings are planned for yarding to the existing NFS road 3015635. 

Helicopter settings are planned for yarding to landings on the existing NFS road 3015635.

For Alternative 3, OGR boundary moved south and adjacent to unit.

 ENGINEERING/ROADS:

No proposed road construction

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Gravelly Creek. (Stream 1.2L characteristics do not include project-specific, field-verified, 

information)

Stream#: 1.2L Class: I, III Flagging: B/W, O/W C- Type: HCLw, HCM

Concerns: none

Buffer (RMA): Class I for HCLw greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: 1 Class: I Flagging: B/W C- Type: FPM, MMM

Concerns: none

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A

Unit

Number 122 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 122

Stream#: 1.3L Class: II, III Flagging: B/W, O/W C- Type: HCM, HCD

Concerns: blowdown, active erosion, and steep side-slopes with mobile fine sediment

Buffer (RMA): Class II for HCM and HCD greater of 100 feet or to the top of the side-slope break. Class III for HCD and 

HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category A and B 

Stream#: 1.3L.3L Class: III Flagging: O/W C- Type: HCM

Concerns: active erosion and steep side-slopes with mobile fine sediment.

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B

Stream#: 1.3L.5L Class: III Flagging: O/W C- Type: HCM

Concerns: active erosion and steep side-slopes with mobile fine sediment

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Timber Production LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from 25 to greater than 100%. All slopes greater than 72% are located in the soil exclusion area. About 3 acres 

were excluded due to high landslide potential, active and historic landslides, colluvial activity, very steep slopes. Based on 

GIS analysis, there are approximately 2 acres of emergent short sedge/forested wetland complex in the southwest corner of 

the unit (BMP 12.5). In the eastern portion of the unit, there is about 1/4 acre of emergent short sedge wetland and 3 acres 

of forested wetland (BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension yarding or shovel 

yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern 1/2 of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, and 5: Current OGR boundary near unit to the north 

Alternative 3: OGR boundary moved south and adjacent to unit
3015635

1.3L

1.2L

1.1L.6R.1

1.3L

1.2L.1

L

2. L

1.1L.6R

1.2L.1L

1.1L.3R

1 3. L.4L

1.1L.2R

1.2L.1L.1L

1.3L.1 L

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.2L .1L

1.3L.2R

1

1.1L.2R

1.2 L

1993 1995

1996

1993

121

122

122

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 122 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3015635

1.3L

1.2L

1.1L.6R.1

1.3L

1.2L.1

L

2. L

1.1L.6R

1.2L.1L

1.1L.3R

1 3. L.4L

1.1L.2R

1.2L.1L.1L

1.3L.1 L

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.2L .1L

1.3L.2R

1

1.1L.2R

1.2 L

1993 1995

1996

1993

121

122

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 122 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3015635

1.3L

1.2L

1.1L.6R.1

1.3L

1.2L.1

L

2. L

1.1L.6R

1.2L.1L

1.1L.3R

1 3. L.4L

1.1L.2R

1.2L.1L.1L

1.3L.1 L

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.2L .1L

1.3L.2R

1

1.1L.2R

1.2 L

1993 1995

1996

1993

121

122

122

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 122 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3015635

1.3L

1.2L

1.1L.6R.1

1.3L

1.2L.1

L

2. L

1.1L.6R

1.2L.1L

1.1L.3R

1 3. L.4L

1.1L.2R

1.2L.1L.1L

1.3L.1 L

1.3L.3R

1.3L 5. L

1.1L

1.3L.5L.1R

1.2L .1L

1.3L.2R

1

1.1L.2R

1.2 L

1993 1995

1996

1993

121

122

122

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 122 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 123

Total Unit

Acres:

20.2 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

532

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: The unit has old-growth to uneven-age stand characteristics. The overstory consists primarily of a mixture 

of western hemlock and western redcedar with lesser amounts of Sitka spruce. Overstory distribution is variable due to heavy 

windthrow. The northern 1/3 of the unit has rough trees due to heavy wind damage. Stem decay and wind are the main 

damage factors associated with tree health and volume loss. Mistletoe is light. Windthrow risk is high. All previous harvest 

areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for 

no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 9 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The required legacy 

structure is placed to shorten required road length, block up POG, and build of the RMA's to provide RAW buffers. Mapped 

legacy acres equals about 9. Any adjustments to the planned unit during implementation must consider the planned acreage 

and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding. Shovel settings are planned for yarding to the proposed temporary 

road. 

Alternative 5: This unit is planned for helicopter yarding to the existing NFS road 3000120.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road in Alternatives 2 and 3, totaling 1,500 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to the Thorne River estuary. 

Stream#: 2 Class: II Flagging: B/W C- Type: MMO 

Concerns: none

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

Stream#: 2.1R Class: II Flagging: B/W C- Type: HCO 

Concerns: none

Unit

Number 123 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

One infestation of white sweet clover located along highway about 1/2 mile west of unit. Population has been treated; 

monitor and treat again, if plants are observed. This is the only population known in project area.
Unit 123

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

Stream#: 3 Class: II, III Flagging: B/W, O/W C- Type: HCM 

Concerns: none

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break

Alternatives 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 123: Alternatives 2 and 3 -- No known stream crossings . If any stream crossings are found, 

crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to 

construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 

14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is mostly Very Low, but 5 acres are considered Low . It is entirely in 

Modified Landscape LUD and is mostly Not Seen. The lower 100 to 700 ft are in legacy, so they will provide some screening 

from the Control Lake-Thorne Bay highway; the nearest edge of the harvested area is about 2,000 ft away from the highway 

and there is topographic screening as well. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from 20 to 45%. Forested wetlands are intermittent throughout the unit. The soils and wetlands are suitable for 

a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; Legacy acres 

cover some deer winter range.

Alternative 4: Unit dropped because it provides a refugia surrounded by young-growth and to maintain other habitat values 

and minimize road building.
RR

LAKE 

A1

3000110

929

3000110

3000120

3000124

3000125

3000120

1.1L

2.1R

4

1

3.1R

2

3

3

1972

1963

1972

1999

1972

1972

123

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 123 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
RR

LAKE 

A1

3000110

929

3000110

3000120

3000124

3000125

3000120

1.1L

2.1R

4

1

3.1R

2

3

3

1972

1963

1972

1999

1972

1972

123

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 123 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
RR

LAKE 

A1

3000110

929

3000110

3000120

3000124

3000125

3000120

1.1L

2.1R

4

1

3.1R

2

3

3

1972

1963

1972

1999

1972

1972

123

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 123 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 124

Total Unit

Acres:

6.3 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

125

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock and western 

redcedar. Sitka spruce is present, but widely scattered. Stem form (top damage) and moderate heart and stem rot in the 

western hemlock and western redcedar are the main damage agents affecting tree health and volume. The average defect is 

moderate with patches of high defect particularly where larger diameters trees occur. Numerous dead tops are in the western 

redcedar. Windthrow risk is moderate. All previous harvest areas adjacent to or near this unit have met green-up with 

regeneration over 5 feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding to the proposed temporary road. 

Alternative 5: This unit is planned for helicopter yarding to the existing NFS road 3000120.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2 and 3, totaling 200 feet, as displayed on the unit card. No 

road construction is proposed in Alternatives 4 and 5.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne Bay. 

Stream#: 1.1L Class: III, IV Flagging: O/W, G/W C- Type: PAS, PAO

Concerns: none

Buffer (RMA): Class III for PAS consider no or limited harvest areas. Class IV for PAO none. 

Alternatives 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: Lake-A1 Class: III Flagging: O/W C- Type: L

Concerns: none

Buffer (RMA): Class III for Lake-A1 consider no or limited harvest areas. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

Temporary roads for Unit 123: Alternatives 2 and 3 -- No known stream crossings . If any stream crossings are found, 

Unit

Number 124 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 124

crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to 

construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 

14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes are nearly level. Forested wetlands are intermittent throughout the unit. The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped because it provides a refugia surrounded by young-growth and to maintain other habitat values 

and minimize road building.
RR

LAKE 

A1

3000123

3000122

3000125

3000124

929

3000120

1.1R

1.1L

2

1.1L

.1R

1.2L 1.3L

1

1

3.1R

2

3

3

1

1

1963

1999

1972

1972

1978

1973

123

124

125

126

129

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 124 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
RR

LAKE 

A1

3000123

3000122

3000125

3000124

929

3000120

1.1R

1.1L

2

1.1L

.1R

1.2L 1.3L

1

1

3.1R

2

3

3

1

1

1963

1999

1972

1972

1978

1973

123

124

125

126

129

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 124 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
RR

LAKE 

A1

3000123

3000122

3000125

3000124

929

3000120

1.1R

1.1L

2

1.1L

.1R

1.2L 1.3L

1

1

3.1R

2

3

3

1

1

1963

1999

1972

1972

1978

1973

123

124

125

126

129

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 124 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 125

Total Unit

Acres:

6.4 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

75

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock, along with 

western redcedar. Sitka spruce is present, but scattered. The main damage agents affecting tree health and volume are 

moderate mistletoe and moderate heartwood/stem decay. The unit has low volume due to past blowdown, small diameter 

trees and stem decay. The western redcedar generally has moderate to high defect, except for a clean pocket in the 

southeast portion of the unit west of the drainage. The northwestern section of the unit has the lowest and least amount of 

merchantable volume with the understory/midstory more prominent than the overstory, most likely from past blowdown. 

Windthrow risk is moderate overall. All previous harvest areas adjacent to or near this unit have met green-up with 

regeneration over 5 feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3000120.

 ENGINEERING/ROADS:

 No proposed road construction

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne Bay.

Stream#: 1 Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 125 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 125

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from 20 to 50%. No wetlands have been mapped in the unit. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9)

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped because it provides a refugia surrounded by young-growth and to maintain other habitat values.
RR

RR

3000123

3000122

3000120

3000120

929

1.1R

5

1.1L

6.3L

6.4L

6.2R

6.1R

6

1

1

1

1963

1978

1973

1966

124

125

126

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 125 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
RR

RR

3000123

3000122

3000120

3000120

929

1.1R

5

1.1L

6.3L

6.4L

6.2R

6.1R

6

1

1

1

1963

1978

1973

1966

124

125

126

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 125 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
RR

RR

3000123

3000122

3000120

3000120

929

1.1R

5

1.1L

6.3L

6.4L

6.2R

6.1R

6

1

1

1

1963

1978

1973

1966

124

125

126

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 125 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 126

Total Unit

Acres:

2.3 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

56

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit has predominantly old-growth stand structure. The overstory consists of a mixture of western 

hemlock, western redcedar and Sitka spruce with moderate defect. Stem decay coupled with wind damage are the primary 

damage agents. Overall the unit has high wind risk with several areas blowdown. Areas of advanced regeneration with 

variable densities and ages have occupied these openings. Throughout most of the unit scattered pockets of larger, lower 

defect western redcedar and Sitka spruce are present, especially along benches. Windthrow risk is high. Mistletoe 

occurrence is low. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet 

tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objective

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3000120.

 ENGINEERING/ROADS:

 No proposed road construction

 BOTANY:

No Concerns

 FISHERIES:

All streams are tributaries to Thorne Bay.

Stream#: 6 Class: II, III Flagging: B/W, O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class II for HCD greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top of the 

side-slope break. 

Alternatives 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 126 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 126

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance. The 

physical boundaries of the unit are not to be modified without input from a Forest Service heritage specialist.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes in the unit range from 12% to 150%. All slopes greater than 60% are located within the soil deferral. About 28 acres 

were excluded due to unstable soils and steep slopes. Forested wetlands were identified in the field but are within the soil 

deferral area. In the remainder of the unit, a minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern 1/2 of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.

Alternative 4: Unit dropped because it provides a refugia surrounded by young-growth and to maintain other habitat values.
RR

A1

929

3000122

3000120

3018050

3000123

5

1

6

1

1

5

1.2L.3L

5.1L

1.1R

LAKE A

2

1.1L

5.2L

4

5.3 L

5.4L

5.6R

6.3L

5.5L

5

6.4L

3

6.2R

1

6.1R

7.1L

2

7.1L

1963

1966

1973

1978

1997

125

126

127

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 126 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
RR

A1

929

3000122

3000120

3018050

3000123

5

1

6

1

1

5

1.2L.3L

5.1L

1.1R

LAKE A

2

1.1L

5.2L

4

5.3 L

5.4L

5.6R

6.3L

5.5L

5

6.4L

3

6.2R

1

6.1R

7.1L

2

7.1L

1963

1966

1973

1978

1997

125

126

127

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 126 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
RR

A1

929

3000122

3000120

3018050

3000123

5

1

6

1

1

5

1.2L.3L

5.1L

1.1R

LAKE A

2

1.1L

5.2L

4

5.3 L

5.4L

5.6R

6.3L

5.5L

5

6.4L

3

6.2R

1

6.1R

7.1L

2

7.1L

1963

1966

1973

1978

1997

125

126

127

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 126 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 127

Total Unit

Acres:

82.8 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

2,063

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 127 has predominantly old-growth stand structure. The overstory consists of a mixture of mature 

western hemlock, western redcedar and Sitka spruce. Volume growth is static. Moderate stem decay coupled with windthrow 

are the primary damages. Overall the unit has high wind risk with several areas blowdown. Mistletoe is light. All previous 

harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objective.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. Tongass Wide Young Growth Study (TWYGS) sites (POW Thorne Bay 

Experiment #1 and POW Overview East Experiment #1) are along the southeastern and northern boundaries. Protection of 

these sites are required. Contact the Forestry Sciences Lab in Juneau for additional information. 

The legacy standard and guide applies in this VCU. This requires that approximately 38 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy in SW placed to 

create a 60-ac block of POG (together with soils drops to the west in unit 126) surrounding RMA and to reduce visual effects 

from Thorne Bay. Legacy at NW placed to reduce required roading and create a 6-ac POG patch. Legacy also builds off 

RMAs, divides the opening into three, and includes some unsuitable soils. Mapped legacy equals about 44 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill 

and downhill yarding to landings on the proposed temporary roads. Shovel settings are planned for yarding to the proposed 

temporary road. 

Alternative 5: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding 

to the existing NFS road 3018050. Helicopter yarding is planned to landings on the existing NFS road 3018050.

 ENGINEERING/ROADS:

Unit is accessed by four proposed temporary roads in Alternatives 2,3, and 4, totaling 5,000 feet, as displayed on the unit 

card. Southern temporary road system may need to be adjusted to avoid TWYGS study area.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 127 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 127

Streams are tributaries to Deer Creek. Stream 1 characteristics are not based on project specific field verified information.

Stream#: 6 Class: II, III Flagging: B/W, O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class II for HCD greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top of the 

side-slope break. 

Alternatives 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and B

Stream #: 2 Class: II, III IV Flagging: B/W, O/W, G/W C- Type: HCO, MMO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class III for HCO to the top of the 

side-slope break. Class IV for MMO.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A, B and C

Stream #: 5 Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and C 

Stream #: 5.1 Class: II Flagging: B/W C- Type: MMO

Concerns: none

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A 

Stream #: Lake-A1 Class: II Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Lake A-1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, riparian 

associated wetland fens, or height of one site potential tree.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 127: Alternatives 2, 3, and 4 -- One Class III stream crossings. The temporary roads have not 

been field verified and will be surveyed before implementation. If any additional stream crossings are found, crossings 

structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction 

(BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of about 55 acres of Low and 33 acres of Very Low . It is entirely in 

Modified Landscape LUD and is partially in Middleground from the Thorne Bay to Sandy Beach Rd at a distance of at least 

3,300 ft and from Thorne Bay Saltwater Use Area at a distance of more than 4,000 ft. Legacy polygons serve to break up the 

unit into three openings; thus eliminating scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:
Unit 127 SOILS/WETLANDS:

Slopes range from 20 to greater than 60%. There are steep slopes along the western boundary that are included in an 

unsuitable soil exclusion area. About 6 acres were excluded due to very high landslide potential, colluvial activity, and steep 

slopes adjacent to a steep v notch. Forested wetlands are found in the northern half of the unit. In the remaining unit, the 

soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow 

BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent 

rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern lobe and western 1/2 of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some 

deer winter range and marten habitat.
3000127

3018050

3000123

3000122

3018000 1.3L.1

7.1L

2

5

1.2L.3L

1

1

1.3L.1L

1.3L

1.2L.1L.2

1.2L .1L 3

LAKE A1

7

2

1.2L.3L 1.2L.3L.1L

5.2L

1.1L

1.2L

4

5.3 L

5.4L

5.6R

1.2L

6.3L

5.5L

5

6.4L

1.3L

3

6.2R

1

1

1.1R

5.1L

6.1R

7.1L

1 2. L.2L

1997

1963

1963

1973

1999

1963

1978

126

127

128

129

125

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 127 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000127

3018050

3000123

3000122

3018000 1.3L.1

7.1L

2

5

1.2L.3L

1

1

1.3L.1L

1.3L

1.2L.1L.2

1.2L .1L 3

LAKE A1

7

2

1.2L.3L 1.2L.3L.1L

5.2L

1.1L

1.2L

4

5.3 L

5.4L

5.6R

1.2L

6.3L

5.5L

5

6.4L

1.3L

3

6.2R

1

1

1.1R

5.1L

6.1R

7.1L

1 2. L.2L

1997

1963

1963

1973

1999

1963

1978

126

127

128

129

125

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 127 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000122

3018050

3018000

3000127

3000123

1.2L.1L.2

5

1.2L.3L

1 1

1.3L.1L

1.3L.1

1.3L

1.2L .1L 3

LAKE A1

7

2

1.2L.3L 1.2L.3L.1L

5.2L

1.1L

1.2L

4

5.3 L

5.4L

5.6R

1.2L

6.3L

5.5L

5

6.4L

1.3L

3

6.2R

1

1

1.1R

5.1L

6.1R

7.1L

1 2. L.2L

7.1L

2

1997

1963

1963

1973

1999 1963

1978

128

129

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 127 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000127

3018050

3000123

3000122

3018000 1.3L.1

7.1L

2

5

1.2L.3L

1

1

1.3L.1L

1.3L

1.2L.1L.2

1.2L .1L 3

LAKE A1

7

2

1.2L.3L 1.2L.3L.1L

5.2L

1.1L

1.2L

4

5.3 L

5.4L

5.6R

1.2L

6.3L

5.5L

5

6.4L

1.3L

3

6.2R

1

1

1.1R

5.1L

6.1R

7.1L

1 2. L.2L

1997

1963

1963

1973

1999

1963

1978

126

127

128

129

125

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 127 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 128

Total Unit

Acres:

54.0 Prescription: Clearcut

VCU

Number:

586

0

Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

1,016

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit varies from old-growth to uneven-age stand structure. The overstory consists of western 

hemlock with western redcedar and Alaska-cedar mixed in. There is a high abundance of mistletoe and heart rot in the 

western hemlock. The larger diameter cedars also were high defect. Mid-diameter cedar are generally low defect. Significant 

older wind damage was noted in the unit resulting in a heavy stocking of western hemlock in the midstory. These areas have 

an uneven-age appearance. Windthrow risk is high. Mistletoe is high. A past harvest to the west on USFS land has met 

green-up with regeneration over 5' tall. The harvest areas on state land adjacent to the northern and southern boundaries are 

more recent and have not yet reached the green-up requirement, but do not count towards USFS opening size restrictions. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

A Tongass Wide Young Growth Study site (POW Thorne Bay Experiment #1) is along the western boundary. Protection of 

this site is required. Contact the Forestry Sciences Lab in Juneau for additional information. 

The legacy standard and guide applies in this VCU. This requires that approximately 23 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy is placed to exclude 

two sensitive plant populations from harvest, build off RMAs for wind firming and block up POG, maintain east-west and northsouth connectivity, and exclude unsuitable soils. Total mapped legacy equals approximately 24 acres. Any adjustments to 

the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for shovel yarding. Shovel settings are planned for yarding to the proposed 

temporary roads and existing NFS road 3018050. 

Alternative 5: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding 

to the existing NFS road 3018050. Helicopter settings are planned for yarding to landings on the existing NFS road 3018050. 

Some yarding through young-growth will be necessary. Yarding should be conducted using corridors to reduce impacts on 

young-growth.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternatives 2,3, and 4, totaling 2,900 feet, as displayed on the unit 

card.

 BOTANY:

Two lesser round-leaved orchid (sensitive plant) populations (5 and 24 individuals) were entirely incorporated into legacy, 

while still allowing access to existing road.

This unit indirectly affects the two populations in Legacy, located in the north and central portions of the unit.

 FISHERIES:

Unit

Number 128 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 128

Streams are tributaries to Slide Creek. 

Stream#: 1.2L.1L Class: II, IV Flagging: B/W, G/W C- Type: MMO, HCO, HCM

Concerns: blowdown

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO and HCM greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category A and C 

Stream#: 1.2L.3L Class: II Flagging: B/W C- Type: MCS, PAB, HCM

Concerns: none

Buffer (RMA): Class II for MCS and HCM greater of 100 feet or to the top of the side-slope break. Class II for PAB greater of 

100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category A 

 

Stream#: 5.1L Class: II Flagging: B/W C- Type: MMO

Concerns: none

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A 

Stream #: Lake-A1 Class: II Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Lake A-1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, riparian 

associated wetland fens, or height of one site potential tree.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 128: Alternatives - 2, 3, and 4 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

The northwestern portion of the unit has slopes ranging from 15 to 35%. In the southeastern portion of unit, the slopes range 

from 30 to 55%. In the southwestern area, a minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). There are intermittent forested wetlands in the unit. There are about 40% forested wetland 

along the proposed road line. There is a muskeg located in the central west part of the southeast area. The soils and 

wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 

12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. 

Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.
Unit 128

Alternatives 2, 3, and 4: A temporary road will impact about 1/4 acre of forested wetland within the unit. Wetland avoidance 

was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and 

close the road after harvest (BMP 14.9) (33 CFR BMPs 4,5, 6).

Alternative 5: No temporary roads.

 WILDLIFE:

Unit includes average snow deer winter range (nearly all of unit), some of which is also deep snow marten habitat/deer winter 

range (eastern and western portions of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some 

deer winter range and marten habitat, and reduce required road construction.
3018050

SANDY_BEACH 3000000

1.2L.1L

7.1L

2

1.2L

5

5.4L

1 2. L.1L

7

1.2L.3L

7.1L

2

LAKE A1

5

1.2L.3L 1.2L.3L.1L

1.3L.1L

5.2L

1.2L

4

5.3 L

1.2L.2L

5.6R

1.2L.1L

1.2 L.1L.3R

5.5L

1.2L.1 L.2R

3

1.2L.1L.1L

1

5.1L

1963 1

1963

1997

1963

1973

1999

1963

1970

1970

1961

128

128

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 128 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
SANDY_BEACH 3000000

3018050

7.1L

2

1.2L

5

1 2. L.1L

5.6R

7

1.2L.3L

7.1L

2

LAKE A1

5

1.2L.3L 1.2L.3L.1L

1.3L.1L

5.2L

1.2L

4

5.3 L

5.4L

1.2L.2L

1.2L.1L

1.2 L.1L.3R

5.5L

1.2L.1 L.2R

3

1.2L.1L.1L

1

5.1L

1

1.2L.1L

1963

1963

1997

1963

1973

1999

1963

1970

1970

1961

128

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 128 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3018050

SANDY_BEACH 3000000

1.2L.1L

7.1L

2

1.2L

5

5.4L

1 2. L.1L

7

1.2L.3L

7.1L

2

LAKE A1

5

1.2L.3L 1.2L.3L.1L

1.3L.1L

5.2L

1.2L

4

5.3 L

1.2L.2L

5.6R

1.2L.1L

1.2 L.1L.3R

5.5L

1.2L.1 L.2R

3

1.2L.1L.1L

1

5.1L

1963 1

1963

1997

1963

1973

1999

1963

1970

1970

1961

128

128

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 128 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3018050

SANDY_BEACH 3000000

1.2L.1L

7.1L

2

1.2L

5

5.4L

1 2. L.1L

7

1.2L.3L

7.1L

2

LAKE A1

5

1.2L.3L 1.2L.3L.1L

1.3L.1L

5.2L

1.2L

4

5.3 L

1.2L.2L

5.6R

1.2L.1L

1.2 L.1L.3R

5.5L

1.2L.1 L.2R

3

1.2L.1L.1L

1

5.1L

1963 1

1963

1997

1963

1973

1999

1963

1970

1970

1961

128

128

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 128 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 129

Total Unit

Acres:

9.9 Prescription: Clearcut

VCU

Number:

586

0

Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

248

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old growth stand structure. The overstory consists primarily of western hemlock and 

redcedar in a mostly even distribution. Sitka Spruce is widely scattered throughout the unit. Normal rates of stem decay and 

stem form deformity are the main damages. The large diameters cedars tended to have more defect. The majority of the 

western hemlock are small to medium diameter with moderate to high stem decay and stem form deformity. Windthrow risk 

is moderate. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. 

This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for shovel yarding. Shovel settings are planned for yarding to the proposed 

temporary road. 

Alternative 5: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned to the 

proposed temporary road. Helicopter settings are planned to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2,3, and 4, totaling 1300 feet, as displayed on the unit card. 

Unit is accessed by a proposed temporary road in Alternatives 5, totaling 400 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Thorne Bay. 

Stream#: 1 Class: III Flagging: O/W C- Type: MCS

Concerns: none 

Buffer (RMA): Class III for MCS to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

Unit

Number 129 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 129

Temporary roads for Unit 129: Alternative 5 -- No known stream crossings. Alternatives 2, 3, and 4 -- Two Class IV stream 

crossings. The temporary roads for Alternatives 2, 3, and 4 have not been field verified and will be surveyed before 

implementation. Crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or 

hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 

13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from nearly level to 60%. The steep slopes are located in an incised drainage way in the eastern side of the 

unit within the RMA. The majority of the slopes in this unit are 10 to 35%. No wetlands have been mapped in the unit. The 

soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow 

BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent 

rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

The proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 

acres.
LAKE 

A1

3000120

3000123

3000122

3000120

3000125

3000127

3000123

1.3L

1.1R

1.3L.2L.1L

1

1

A2

A3

1

3

2

1.1L

1.1L

5.4L

5.6R

1.2L

5.5L

5

6.4L

1999

1963

1963

1999

1978

1972

1999

1999

126

127

129

130

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 129 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
LAKE 

A1

3000120

3000123

3000122

3000120

3000125

3000127

3000123

1.3L

1.1R

1.3L.2L.1L

1

1

A2

A3

1

3

2

1.1L

1.1L

5.4L

5.6R

1.2L

5.5L

5

6.4L

1999

1963

1963

1999

1978

1972

1999

1999

126

127

129

130

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 129 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
LAKE 

A1

3000120

3000120

3000125

3000127

3000123

3000123

3000122

1.3L.2L.1L

1

1

A2

A3

1

3

2

1.1L

1.1L

5.4L

5.6R

1.2L

5.5L

5

6.4L

1.3L

1.1R

1999

1963

1963

1999

1978

1972

1999

1999

129

130

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 129 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
LAKE 

A1

3000120

3000123

3000122

3000120

3000125

3000127

3000123

1.3L

1.1R

1.3L.2L.1L

1

1

A2

A3

1

3

2

1.1L

1.1L

5.4L

5.6R

1.2L

5.5L

5

6.4L

1999

1963

1963

1999

1978

1972

1999

1999

126

127

129

130

124

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 129 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 130

Total Unit

Acres:

30.7 Prescription: Clearcut

VCU

Number:

586

0

Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

771

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 130 has old-growth stand structure. The overstory is made up of mature western hemlock, western 

redcedar and Sitka spruce. Past evidence of significant wind disturbance is expressed in the stand structure through the 

mosaic of age classes that are present. Windthrow risk is high throughout the stand. Mistletoe was observed to be 

moderate. Defects and damages are moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting 

NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with light to moderate stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 13 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The required legacy is 

planned to coincide with RMAs, and areas on the east end of the unit to expand RMAs and block up POG. Mapped legacy 

totals about 13 acres. Any adjustments to the planned unit during implementation must consider the planned acreage and 

location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Cable settings are planned for uphill yarding 

to landings on the existing NFS road 3000120. Shovel settings are planned for yarding to the existing NFS road 3000120. 

Helicopter settings are planned for yarding to landings on existing NFS roads 3000120 and 3018000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Slide Creek. Streams 2 and 2.1R characteristics do not contain project specific field verified 

information.

Stream#: 1.3L.2L Class: III Flagging: O/W C- Type: HCD, HCM

Concerns: Blowdown and active erosion and abundant gravel deposits.

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break.

Alternatives 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout

Protection: Category B 

Stream#: 2 Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

Unit

Number 130 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 130

Stream#: 2.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: Lake-A3 Class: III Flagging: O/W C- Type: L

Concerns: none

Buffer (RMA): Class III for Lake-A3 consider no or limited harvest. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B

All other streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from 5% to 30%. Forested wetlands are dominant in the unit. The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Shovel yarding is not 

recommended on slopes over 25% gradient due to presence of deep sapric soils. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (southern lobe of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.
3000120

3018000

3000127

3018050

LAKE A3

A1.1L

1.3L

A3

10

A1.3L

1

TRIB

1.3L

1.1L.1L

1.3L.1L

1.1L

1.2L

1.3L

1.1R

1.3L.2L.1L

1.3L.2L

1.3L.1L

A

A

1

1.3L

A2

1

1999

1963

1973

1963

1999

1978

1999

1963

1999

129

130

131

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 130 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3018000

3000127

3018050

3000120

A1.3L

A2

1

LAKE A3

1.3L

1.3L

A3

10

1

TRIB

A1.3L

1.3L

1.1L.1L

1.3L.1L

1.1L

1.2L

A1.1L

1.1R

1.3L.2L.1L

1.3L.2L

1.3L.1L

A1

1963

1999

1963

1973

1999

1963

1999

1999

1978

129

130

131

520

522 521

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 130 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3018000

3000127

3018050

3000120

A2

1

LAKE A3

1.3L

A3

1.1R

10

1

TRIB

A1.3L

1.3L

1.1L.1L

1.3L.1L

1.1L

1.2L

1.3L

A1.1L

1.3L.2L.1L

1.3L.2L

1.3L.1L

A

A

1

1.3L

1999

1999

1963

1973

1963

1999

1963

1999

1978

129

130 520

521

127

522

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 130 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3018000

3000127

3018050

3000120

A1.3L

A2

1

LAKE A3

1.3L

1.3L

A3

10

1

TRIB

A1.3L

1.3L

1.1L.1L

1.3L.1L

1.1L

1.2L

A1.1L

1.1R

1.3L.2L.1L

1.3L.2L

1.3L.1L

A1

1963

1999

1963

1973

1999

1963

1999

1999

1978

129

130

131

520

522 521

127

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 130 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 131

Total Unit

Acres:

25.4 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

627

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 131 has old growth stand structure. Trees are generally mature with static growth. The overstory 

consists primarily of western hemlock and western redcedar in a patchy to even distribution. Sitka spruce are present but in 

less abundance and as a secondary component in the overstory. Moderate to high Alaska-cedar decline is present in parts 

of the unit. Live Alaska-cedar is present, but at low numbers. Stem decay is the main damage agent affecting tree health and 

volume. Windthrow hazard is moderate. Mistletoe infection is light throughout all units. All previous harvest areas adjacent to 

or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 11 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The required legacy is 

planned to block up POG, while reducing required road length, avoiding areas with longer yarding distances, dividing the unit 

opening in two, and incorporating RMAs. Any adjustments to the planned unit during implementation must consider the 

planned acreage and location of legacy. Total mapped legacy equals about 13 acres.

 TIMBER/LOGGING:

Alternative 2, 3: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill and 

downhill yarding to landings on the proposed temporary road. Shovel settings are planned for yarding to the proposed 

temporary road.

Alternative 5: This unit is planned for a combination of helicopter and shovel yarding. Shovel settings are planned for yarding 

to the proposed temporary road. Helicopter settings are planned for yarding to landings on the existing NFS road 3000120.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternatives 2 and 3, totaling 2,900 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 131 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 131

Streams are tributary to Deer Creek.

Stream#: 1.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM, MMO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for MMO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1.3L.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: Lake-A3 Class: III Flagging: O/W C- Type: L

Concerns: none

Buffer (RMA): Class III for Lake-A3 consider no or limited harvest. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 131: Alternatives 2 and 3 -- Three Class IV stream crossings. If any additional stream crossings 

are found, crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, 

prior to construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, 

and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered 

Seldom Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from 10% to 20%. Forested wetlands occur intermittently in the unit. The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Use care when 

approving shovel yarding on slopes. Avoid track slippage and rutting.

Alternatives 2 and 3: A temporary road will impact about 1/2 acre of forested wetland within the unit and about 1/4 acre 

outside the unit. Wetland avoidance was not feasible because of the abundance of forested wetlands and the road is 

needed to access the western portion of the unit and avoid a stream. Provide adequate cross drainage, remove structures, 

and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes isolated average snow deer winter range (nearly all of unit), most of which is also deep snow marten 

habitat/deer winter range (northern and southern ends of eastern half of unit). Legacy standard and guideline applies in this 

VCU; Legacy acres cover some deer winter range and marten habitat.

Alternative 4: Unit dropped to maintain connectivity and minimize road building.
3018130

3018000

3000120

3018130

1.3L.2L

A1.2L

1.1L

1.1 L

1.1L

1.3L.2L.1L

TRIB

1.1L

1.1L.1R

1.1L.1L

1

LAKE A3

A1.3L

A1.3L

10

TRIB

1999

1963

1995

1995

1973

1999

1999

130

131

132

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 131 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000120

3018000

3018130

3018130

1.1L

1.1L.1R

1.1L.1L

1

LAKE A3

A1.3L

A1.3L

10

TRIB

1.3L.2L

A1.2L

1.1L

1.1 L

1.1L

1.3L.2L.1L

TRIB

1999

1963

1995

1995

1999

1999

1973

131

132

520

521 522

130

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 131 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000120

3018130

3018000

3018130

TRIB

1.1L

1.1L.1R

1.1L.1L

1

LAKE A3

A1.3L

A1.3L

10

TRIB

1.3L.2L

A1.2L

1.1L

1.1 L

1.1L

1.3L.2L.1L

1999

1963

1995

1995

1973

1999

1999

131

132

520

521 522

130

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 131 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 132

Total Unit

Acres:

9.6 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

221

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory composition consists of a mixture of western 

hemlock, western redcedar, Alaska cedar and Sitka spruce. Overstory distribution is variable with even to patchy areas due 

to over-maturity. Mortality related to heavy stem and heart decay in the larger hemlock and decline in the Alaska cedar has 

created an open overstory with growing space being occupied by tall blueberry. Overall stem decay is moderate to high. 

Windthrow risk is moderate. Mistletoe is light. All previous harvest areas adjacent to or near this unit have met green-up with 

regeneration over 5 feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding to the proposed temporary road. 

Alternatives 5: This unit is planned for helicopter yarding to a landing on the existing NFS road 3018130.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2 and 3, totaling 1100 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Deer Creek.

All streams in unit: Class: IV Flagging: G/W C- Type: HC 

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 132: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

Unit

Number 132 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 132

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Modified Landscape LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from nearly level to about 40 percent. Most slopes are under 25%. The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1/2 acre of emergent sedge/forested wetland complex within the unit and an additional 

1/2 acre outside of the unit; wetlands are located between the existing road and the unit and are needed for access by road 

(BMP 12.5, 13.2).Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross 

drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes isolated average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; 

however there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped to provide refugia, though unit is surrounded by muskeg, and reduce road building.
3018130

3000124

3000125

3000120

3018130

1

A1.3L

1.1L

1.1 L

1.1L

TRIB

1.1L

A8.1L.1R

1.1L.1R

1.1L 1. L

LAKE A3

10

TRIB

1963

1963

1962

1995

1995

1963

1999

1999

130

131

132

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 132 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3018130

3000124

3000125

3000120

3018130

1

A1.3L

1.1L

1.1 L

1.1L

TRIB

1.1L

A8.1L.1R

1.1L.1R

1.1L 1. L

LAKE A3

10

TRIB

1963

1963

1962

1995

1995

1963

1999

1999

130

131

132

522

526

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 132 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3018130

3000124

3000125

3000120

3018130

1

A1.3L

1.1L

1.1 L

1.1L

TRIB

1.1L

A8.1L.1R

1.1L.1R

1.1L 1. L

LAKE A3

10

TRIB

1963

1963

1962

1995

1995

1963

1999

1999

130

131

132

522

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 132 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

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Unit 133

Total Unit

Acres:

42.1 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

961

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old growth stand structure. The overstory is generally an uneven distribution of western 

hemlock and western redcedar with patches of Alaska-cedar and scattered Sitka spruce. The overstory is typically moderate 

defect with stem rot, dead tops and mistletoe being of concern. Mistletoe infection rating was high in the eastern portions, 

while non-evident in the north lobe. Alaska-cedar decline is evident in the stand where drainage is poor. Windthrow risk is 

low. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 18 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG and reduce required road length. Mapped legacy equals about 19 acres. Any adjustments to the planned unit 

during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding to the proposed temporary roads. 

Alternative 5: This unit is planned for helicopter yarding to a landing on the existing NFS road 3018122.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternatives 2 and 3, totaling 2,400 feet, as displayed on the unit card. 

Unit is also accessed by existing NFS road 3018122 in Alternatives 2 and 3. See road card for detailed information on 

existing NFS road.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Streams A2 and Lake-A1 characteristics do not include project-specific, field-verified, 

information.

Stream#: A1 Class: II Flagging: B/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A

Stream#: Lake-A1 Class: II Flagging: B/W C- Type: L

Concerns: none known.

Buffer (RMA): Class II for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

Unit

Number 133 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 133

riparian associated wetland fens, or height of one site potential tree.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC, MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 133: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low, except for 1 acre of Low. It is entirely in Modified Landscape 

LUD and is mostly considered Not Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes in this unit range from 10% to 80%. The slopes over 72% occupy less than 1/4 acre within the legacy area; they are 

suitable for harvest. Forested wetlands are located in isolated spots on gentle low-lying slopes in the unit (BMP 12.5). The 

soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow 

BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent 

rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes isolate average snow deer winter range (all of unit except eastern edge). Legacy standard and guideline 

applies in this VCU; Legacy acres cover some deer winter range.

Alternative 4: Unit dropped to provide refugia and reduce road building.
3018110

3000000

3018100

3018122

LAKE A1

A1.1R

A5

1

A4.1L

A2

A4.1L.1L

A4.1L

A1.1R.1L

A1

1

1.1L

1.2 R

A4

1973

1963

1963

1963 1963 1973

1969

1969

1973

1973

1973

1963

1973

1973

133

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 133 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3018100

3018110

3018122

1

1.1L

1.2 R

A4

LAKE A1

A1.1R

A5

1

A4.1L

A2

A4.1L.1L

A4.1L

A1.1R.1L

A1

1973

1963

1963

1963 1963 1973

1969

1969

1973

1973

1973

1963

1973

1973

520

531

532 533

133

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 133 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3018100

3018110

3018122

3000000

3018100

3018100

A4

LAKE A1

A1.1R

A5

1

A4.1L

A2

A4.1L.1L

A4.1L

A1.1R.1L

A1

1

1.1L

1.2 R

1973

1963

1963

1963 1963 1973

1969

1969

1973

1973

1963

1973

1973

1973

520

531

133

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 133 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

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Unit 135

Total Unit

Acres:

18.8 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

259

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure and marginal volume for harvest. The overstory consists primarily 

of western hemlock, western redcedar and Sitka spruce. The main damage agent affecting tree health and volume loss in the 

overstory is moderate to high amounts of stem decay. Windthrow risk is moderate. All previous harvest areas adjacent to or 

near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

A Tongass Wide Young Growth Study (TWYGS) site (POW Slide Creek Experiment #4) is along the western boundary. 

Protection of this site is required. Contact the Forestry Sciences Lab in Juneau for additional information.

The legacy standard and guide applies in this VCU. Original unit opening size was 27 acres; this requires that approximately 

8 acres of productive old growth representative of the overall composition of the planned harvest area be maintained 

indefinitely. Legacy was placed to block up POG and reduce required road length. Mapped legacy equals about 8 acres. 

Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill 

yarding to landings on the proposed temporary road. Shovel settings are planned for yarding to the proposed temporary 

road. 

Alternative 5: This unit is planned for helicopter yarding to landings on the existing NFS road 3018200.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2 and 3, totaling 2,900 feet, as displayed on the unit card. 

Approximately 1,400 feet of this road will be constructed across decommissioned road bed. Road may need to be moved 

slightly to avoid the TWYGS site.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 135 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

One infestation of common tansy located along road 3018200 about 1/4 mile southwest of unit. Population has been treated; 

monitoring has not observed continued infestations. This location should be monitored and treated if plants are observed.
Unit 135

 FISHERIES:

Streams are tributaries to Slide Creek. 

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

All streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): none

Protection: Category C 

Temporary roads for Unit 135: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Timber Production LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from about nearly level to about 50%. There are approximately 12 acres (63% of the unit) of forested wetland 

located in the central portion of the unit (BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension 

yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator 

should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

The temporary road will impact less about 1/3 acre of forested wetlands (BMP 12.5, 13.2). Wetland avoidance was not 

practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the 

road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes isolated average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer 

winter range (southern half of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.

Alternative 4: Unit dropped to provide refugia and reduce road building.
3018300

3018480

3018450

3018200

3018000

3018520

1.10L

A1

1965

1970

1964

1995

1995

1973

135

136

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 135 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3018300

3018480

3018450

3018200

3018000

3018520

1.10L

A1

1965

1970

1964

1995

1995

1973

135

136

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 135 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3018520

3018300

3018480

3018450

3018200

3018000

1.10L

A1

1965

1970

1964

1995

1995

1973

135

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 135 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 136

Total Unit

Acres:

11.4 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

207

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: Unit 136 has old-growth stand structure. The overstory consists of western hemlock, Sitka spruce and 

western redcedar. Stem decay is the main damage. Scattered dead or dying tops are common in all species. The average 

defect rating is high. Mistletoe was rated as low. The unit has a high windthrow risk. All adjacent past harvest units meet 

NFMA requirements for green-up. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2, 3, and 4, totaling 900 feet, as displayed on the unit card. 

Existing NFS roads 3018500 and 3018520 will require reconstruction, totaling 4100 feet, to provide access to the unit. 

Existing NFS road 3018500 will also be used to access Unit 139.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream Lake-A1 characteristics do not contain project specific field verified information.

Stream#: Lake-A1 Class: I Flagging: B/W C- Type: L

Concerns: none known

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): none

Protection: Category C

Temporary roads for Unit 132: Alternatives 2, 3, and 4 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

Unit

Number 136 Alternatives 2, 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 136

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low . It is entirely in Timber Production LUD and is considered Not 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes range from nearly level to about 30%. Most slopes are under 25%. There are approximately 2 acres (16% of the unit) 

of forested wetland near the central portion of the western unit boundary and 2 acres (13% of the unit) of emergent short 

sedge/forested wetland complex near the southern unit boundary (BMP 12.5). The soils and wetlands are suitable for shovel 

yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small nonforested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil 

moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact less than 1/4 acre of forested wetland within the unit. About an additional 1/2 acre of forested 

wetland outside of the unit will be impacted by a temporary road needed to access the unit. The existing road is located in a 

wetland and extending the road through wetland was necessary to access the unit (BMP 12.5, 13.2). Wetland avoidance was 

not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and close 

the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (central portion of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.
LAKE A1

3018400

3018540

3018450

3018000

3018520

3018500

1.10L

2

3

1

A1

1.4R.1L

1965

1995

1995

1995

1995

1995

1995

1965

135

136

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 136 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
LAKE A1

3018400

3018540

3018450

3018000

3018520

3018500

1.10L

2

3

1

A1

1.4R.1L

1965

1995

1995

1995

1995

1995

1995

1965

135

136

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 136 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
LAKE A1

3018400

3018540

3018450

3018000

3018520

3018500

1.10L

2

3

1

A1

1.4R.1L

1965

1995

1995

1995

1995

1995

1995

1965

136

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 136 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

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Unit 138

Total Unit

Acres:

35.7 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

797

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Old-Growth stand structure with a mixed western hemlock and western redcedar overstory with mostly 

even distribution. Sitka spruce are widely spaced in the overstory. Mistletoe rating varies across the unit; the rating overall, is 

moderate to heavy. Overstory is typically moderate to high defect with stem rot, stem form and mistletoe being of concern. 

Windthrow risk is low. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet 

tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

Approximately 15 acres of this unit has a Moderate SIO and lies partially in the Foreground, and partially Seldom Seen. 

Legacy was placed to serve as a visual screen for the unit. 

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 15 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to 

reduce the size of the opening created by Units 138 and 139 and to include a sensitive plant population at the SW end of the 

boundary between these two units. Legacy on the east side of unit was placed to reduce required road length and reduce 

visibility of openings from Sandy Beach and the Sandy Beach Rd. Legacy in the SW lobe of unit was placed to block up 

POG adjacent to Slide Cr. RMA. Mapped legacy totals approximately 15 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill 

yarding to landings on the proposed temporary road. Shovel settings are planned for yarding to the proposed temporary 

road. 

Alternative 5: This unit is planned for helicopter yarding to the existing NFS road 3000170.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2 and 3, totaling 2,800 feet, as displayed on the unit card.

 BOTANY:

Alternatives 2, 3, and 5

One population (20 individuals) of Platanthera (sensitive plant) and one population (49 individuals) of Piperia (sensitive plant) 

were partially in the original unit; these areas were entirely incorporated into legacy or deferred. 

This unit indirectly affects the above populations in Legacy and outside the unit to the northeast.

 FISHERIES:

Unit

Number 138 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 138

Streams drain to Slide Creek and to Clarence Strait.

Stream#: 1 Class: I Flagging: B/W C- Type: MMM, MCS

Concerns: blowdown, active erosion and steep side-slopes with mobile sediment

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, riparian associated wetland fens. 

Class I for MCS greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): none

Protection: Category C 

Temporary roads for Unit 138: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of about 15 acres of Moderate and 20 acres of Very Low . It is 

entirely in Modified Landscape LUD and is partially considered Foreground; however, over half of the unit is on the back side 

of the ridge and is Seldom Seen. Legacy patches have reduced the visibility of the unit so that it meets the SIO. Most views 

from Sandy Beach are screened by trees along the road. Opening size allowable by the Forest Plan for Intermediate VAC is 

15 to 40 acres.

 RECREATION:

Harvest in this unit would be heard from Sandy Beach Picnic Area. There are often 10 vehicles at this picnic area in the 

summer. This impact would be short-term and limited to the duration of harvest activities.

 SOILS/WETLANDS:

Slopes average 30 to 50%. Wetlands were not identified in the field. The soils and wetlands are suitable for a minimum 

partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the 

shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not 

be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

Alternatives 2 and 3: The proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (southern half of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.

Alternative 4: Unit dropped because location coincides with the biologically preferred small OGR.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 3, and 5: Current OGR boundary adjacent to unit to the east 

Alternative 4: Unit dropped because it coincides with biologically preferred small OGR
3000160

3000000

3000170

3018550

1.3R

1.1R

1

1

1.

1.2L

5L

1

1.4R

1

1

1965

138 1966

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 138 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000160

3000000

3000170

3018550

1.3R

1.1R

1

1

1.

1.2L

5L

1

1.4R

1

1

1965

138 1966

139

438

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 138 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000160

3000000

3000170

1.3R

1.1R

1

1

1.

1.2L

5L

1

1.4R

1

1

1965

138 1966

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 138 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

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Unit 139

Total Unit

Acres:

2, 3, 5 - 56.8

4 - 17.3

Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

2, 3, 5 - 

1,574

4 - 481

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing condition: This unit has old growth stand structure with a mixed western hemlock and western redcedar overstory. 

Sitka spruce are widely spaced. The mistletoe rating is moderate to heavy. Overstory trees typically moderate to high defect 

with stem decay stem form and mistletoe being of concern. Windthrow risk is moderate. All previous harvest areas adjacent 

to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

Approximately 25 acres of this unit are within a Moderate SIO. Placement of legacy was used to serve as a visual screen for 

most of the unit. Deferral of two settings to a future entry was done to reduce the size of openings.

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 28 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to 

reduce the size of the opening created by Units 138 and 139 to meet NFMA opening size requirements and to include a 

sensitive plant population at the SW end of the boundary between these two units. Legacy at north lobe of unit was placed 

to avoid impacting another sensitive plant, to reduce visibility of unit, and to reduce required road length. Legacy in the SW 

lobe of unit was placed to avoid impacting another sensitive plant population and block up POG adjacent to Slide Cr. RMA. 

Legacy in north-center of unit partially avoids a fourth sensitve plant population. Mapped legacy equals about 36 acres, but 

is under review. Any adjustments to the planned unit during implementation must consider the planned acreage and location 

of legacy. Because of the OGR modification, the planned unit in Alternative 4 is less than 20 acres and therefore doesn't 

require legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill and 

downhill yarding to landings on the proposed temporary road and proposed NFS road 3018550. Shovel settings are planned 

for yarding to the proposed NFS road 3018550. 

Alternatives 4, 5: This unit is planned for helicopter yarding to the existing NFS road 3000170.

 ENGINEERING/ROADS:

Unit is accessed by a proposed NFS road 3018500 in Alternatives 2 and 3, totaling 5500 feet, as displayed on the unit card. 

See road card for detailed information on the proposed NFS road. Unit is also accessed by construction of proposed NFS 

road 3018550 in Alternatives 2 and 3, totaling 600 feet. All of this road will be constructed across a decommissioned road 

bed. Unit is also accessed by a proposed temporary road in Alternatives 2 and 3, totaling 500 feet, as displayed on the unit 

card.

 BOTANY:

Alternatives 2, 3, and 5

Four populations of lesser round-leaved orchid (sensitive plant) were at least partially within the original unit and two 

populations of Alaska rein orchid (sensitive plant) were inside or adjacent to the original unit; three populations of the lesser 

round-leaved orchid and both populations of Alaska rein orchid were entirely incorporated into legacy or excluded from the 

unit and the remaining population of lesser round-leaved orchid was partially incorporated into legacy. This protection was 

provided because few other populations are present in this area. Altogether, the four populations of lesser round-leaved 

Unit

Number 139 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation
Unit 139

orchid contain approximately 124 plants, of which about 55 plants overlapped with the unit. Approximately 25 of these 55 

plants were incorporated into legacy; so about 99 of the plants in these four populations are in legacy or outside the unit. 

Similarly, only about 1 or 2 of the 115 Alaska rein orchid plants in the two populations were inside the original unit boundary 

and these have been incorporated into legacy.

This unit indirectly affects the Alaska rein orchid population located south of the unit and the lesser round-leaved orchid 

populations located to the north and south, either outside the unit or in Legacy.

Alternative 4

Most of the unit was dropped due to OGR modification, including all areas occupied by sensitive plant populations. However, 

indirect effects may occur to the two northern populations of lesser round-leaved orchid.

 FISHERIES:

Streams are tributaries to Slide Creek and to Clarence Strait. 

Stream#: 1 Class: I Flagging: B/W C- Type: MCM, HCV, LCM

Concerns: active erosion, steep side-slopes with exposed bedrock

Buffer (RMA): Class I for MCM, HCV and LCM greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 1.4R Class: I, II Flagging: B/W C- Type: HCM, MMS, MMO

Concerns: none

Buffer (RMA): Class I for HCM greater of 100 feet or to the top of the side-slope break. Class I for MMS and Class II for 

MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 3 Class: II, III, IV Flagging: O/W, G/W C- Type: MMS, HCD, HCM

Concerns: blowdown and active erosion

Buffer (RMA): Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCD and HCM to the top of the side-slope break. Class IV for UC none.

Alternatives: 2, 3, 4 and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category A, B and C 

Temporary roads for Unit 139: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of about 25 acres of Moderate and 22 acres of Low and 12 acres of 

Very Low . It is mostly in Modified Landscape LUD and is partially considered Foreground, partially Middleground, and 

partially Seldom Seen. About 16 acres of the original unit was deferred so that opening sizes would be reduced and the unit 

could meet the SIO. Legacy patches have further reduced the visibility of the unit. Opening size allowable by the Forest 

Plan for Intermediate VAC is 15 to 40 acres.

 RECREATION:

Harvest in this unit would be heard from Sandy Beach Picnic Area. There are often 10 vehicles at this picnic area in the 

summer. This impact would be short-term and limited to the duration of harvest activities.

 INVASIVE SPECIES:

No Concerns
Unit 139

 SOILS/WETLANDS:

Slopes range from 20 to 80% in this unit. Approximately 1.5 acres in the unit are unsuitable for harvest due to colluvial 

activity on the soil surface, high landslide potential to the Class 1 stream, and MMI4 soils. There is a small area of slopes 

greater than 72% the unit on bedrock knobs. This area outside the unsuitable soil exclusion is suitable for harvest with 

minimum partial suspension. Wetlands were not identified in the field. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

Alternatives 2 and 3: The proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (northern half of unit), some of which is also deep snow marten habitat/deer 

winter range (southern half of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.

Alternative 4: Only small northern portion of unit included under Alternative 4 because location coincides with the biologically 

preferred small OGR at Sandy Beach. There are no requirements for Legacy acres in this unit because it is less than 20 

acres.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 3, and 5: Current OGR boundary adjacent to unit boundary to the south. 

Alternative 4: OGR boundary moved to the north, adjacent to unit (covering a portionof the originally planned unit).
3000000

3018540

3018500

3000170

3018400

3018550

3018500

1.4R.1 L

4

2.1L

1

1.4L.2L

1

2

4

1.4R

1.4R

3

2

3

2.1 L.1L

1995

1966

1995

1966

1995

1995

1965

139

138

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 139 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3018540

3018500

3000170

3018400

3018550

3018500

1.4R.1 L

4

2.1L

1

1.4L.2L

1

2

4

1.4R

1.4R

3

2

3

2.1 L.1L

1995

1966

1995

1966

1995

1995

1965

139

138

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 139 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3018400

3000170

3018500

3018540

3018550

3018500

4

2.1L

1

1.4L.2L

1

2

4

1.4R

1.4R

3

2

3

2.1 L.1L

1.4R.1 L

1965

1966

1966

1995

1995

1995

1995

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 139 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

3018400

3000170

3018500

3018540

4

2.1L

1

1.4L.2L

1

2

4

1.4R

1.4R

3

2

3

2.1 L.1L

1.4R.1 L

1965

1966

1966

1995

1995

1995

1995

138

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 139 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 140

Total Unit

Acres:

83.5 Prescription: Clearcut and 

25% Removal

VCU

Number:

585 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,084

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has uneven-aged stand structure due to repeated windthrow events. The overstory consists 

primarily of western hemlock as the dominant species along with scattered western redcedar. The main damage agents 

affecting tree health and volume loss is stem decay in the western redcedar and a mixture of stem decay and mistletoe in the 

western hemlock. Overall the average defect rating is high, mostly due to heavy mistletoe. Past windthrow areas are 

concentrated on the bench in the north central part of the area and along the upper portions of the eastern slope break. 

Windthrow risk is high. Overall defect is high, with marginal individual tree value. All previous harvest areas adjacent to or 

near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Shovel and Cable Settings)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with heavy stem decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. Based on the size of the original opening, this requires that 

approximately 21 acres of productive old growth representative of the overall composition of the planned harvest area be 

maintained indefinitely. Legacy was placed to reduce the size of the opening created by units 140 and 141 by building off of 

and providing RAW to the RMA that partially separates the units. The southern lobe of legacy reduces visibility of the 

opening to Sandy Beach and Sandy Beach Rd. and builds off the RMA, blocking up POG. Similarly, small patches of POG 

on the east of CC setting build off of soils legacy to produce a 15-ac block and reduce visibility to Sandy Beach and Sandy 

Beach Rd. Remainder of unit to the NE is partial harvest. A total of about 26 acres is currently mapped as legacy. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Helicopter Settings)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction for how to implement this prescription. Due to 

the proximity and visibility from Sandy Beach, this prescription was used in helicopter settings to reduce the visual impacts of 

harvest.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Cable settings are planned for uphill yarding 

to landings on the proposed temporary roads. Shovel settings are planned for yarding to the proposed temporary roads and 

proposed NFS roads 3000195 and 3000197. Helicopter settings are planned for yarding to landings on the proposed 

temporary roads. Even-age management is planned in the shovel and cable settings. Uneven-age management single tree 

selection with 75% retention is planned in the helicopter settings.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000195, totaling 5400 feet, as displayed on the unit card. Approximately 2400 feet 

of this road will be constructed across decommissioned road bed. This road is also used to access Units 141 and 142. See 

road card for detailed information about the proposed NFS road. This unit is also accessed by two proposed temporary 

roads, totaling 800 feet, as displayed on the unit card.

 BOTANY:

Unit

Number 140 Alternatives 2, 3, 4

Summary of Concerns, Responses, BMPs and Mitigation
Unit 140

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 2.2R.1R Class: I, II Flagging: B/W C- Type: HCO, MMS, MMO 

Concerns: none 

Buffer (RMA): Class I and II for HCO greater of 100 feet or o the top of the side-slope break. Class II for MMS and MMO 

greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A 

Stream#: 2.4R Class: II, III, IV Flagging: B/W, O/W, G/W C- Type: HCM, HCO 

Concerns: none 

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout

Protection: Category A, B and C 

Stream#: 4 Class: I, II, III, IV Flagging: B/W, O/W, G/W C- Type: MMS, MMO, HCO, HCL

Concerns: blowdown

Buffer (RMA): Class I for MMS and MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. Class II for HCL to the top of the 

side-slope break. Class IV MMO none. 

Alternatives: 2,	 3, and 4 Buffer (RAW): no review needed.

Protection: Category A, B, and C

Stream#: 4.4L Class: III, IV Flagging: O/W, G/W C- Type: HCO 

Concerns: none 

Buffer (RMA): Class III for HCO to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout

Protection: Category B and C 

Stream#: 4.6L Class: II, IV Flagging: B/W, G/W C- Type: HCO 

Concerns: none 

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the the side-slope break. Class IV for HCO none. 

Alternatives: 2,	 , and 4 Buffer (RAW): no review needed

Protection: Category A and C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 140: Alternatives 2, 3, and 4 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

 INVASIVE SPECIES:

No Concerns
Unit 140

The Scenic Integrity Objective (SIO) for this unit consists of about 88 acres of Low and 6 acres of Very Low. It is in Modified 

Landscape LUD and is partially considered Foreground, but mostly in Middleground. The most visible portions of the unit are 

in uneven-aged management and legacy patches screen part of the unit and reduce the size of openings so that the SIO can 

be met.

 RECREATION:

Harvest in this unit would be heard from Sandy Beach Picnic Area. There are often 10 vehicles at this picnic area in the 

summer. This impact would be short-term and limited to the duration of harvest activities.

 SOILS/WETLANDS:

Slopes range from nearly level to about 83%.There less than 3/4 acre of slopes greater than 72% that are suitable for harvest 

with minimum partial suspension. About 9 acres were excluded due to very high landslide potential, colluvial activity, and 

very steep wet slopes adjacent to a steep v notch. Forested wetlands range from 15 to 60% of the unit. The soils and 

wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 

12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. 

Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

Two temporary road will impact about 2/3 acre within the unit, and less than 1/4 acre outside of the unit. Wetland avoidance 

was not practicable due to the abundance of forested wetland and the need for access. Provide adequate cross drainage, 

remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern lobes of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.
3000000

3000190

3018500

3000197

3000195

4.4L

4

2

4

4

2.2L

2.2L.2L

2

2

2. R.1R

2.6L

2.4R

2.7R

2.8R

4.7R

2.5L

4.2L

4.5R

4.1R

4.6L.1L

2 A

4.3L

2.3R

4

4.6L

2.4R.1L

2.2L.2L

2.2L.1L

3

2.2L

2

4.6L

2.4R

2.2R .1 R

1992

1995

1970

1966

1995

140 141

142

143

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 140 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000190

3018500

3000197

3000195

4.4L

4

2

4

4

2.2L

2.2L.2L

2

2

2. R.1R

2.6L

2.4R

2.7R

2.8R

4.7R

2.5L

4.2L

4.5R

4.1R

4.6L.1L

2 A

4.3L

2.3R

4

4.6L

2.4R.1L

2.2L.2L

2.2L.1L

3

2.2L

2

4.6L

2.4R

2.2R .1 R

1992

1995

1970

1966

1995

140 141

142

143

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 140 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3000190

3018500

3000195

3000197

2

2. R.1R

2

4

4

4

2.2L.2L

2

4.4L

2.6L

2.4R

2.7R

2.8R

4.7R

2.5L

4.2L

4.5R

4.1R

4.6L.1L

2.4R

4.3L

2.3R

4

4.6L

2.4R.1L

2.2L.2L

2.2L.1L

3

2.2L

2

2 A

4.6L

2.2R .1 R

2.2L

1992

1995

1995

1966

1970

140

142

143

139

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 140 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

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Unit 141

Total Unit

Acres:

33.9 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

740

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: Unit 141 has mostly old-growth structure with areas in the northeast tending toward uneven-age. The 

overstory is composed of mostly western redcedar with western hemlock, Sitka spruce and some patches of Alaska-cedar. 

Heart rot, bole cracks, shake, mistletoe and broken and dead tops are common. The overall average defect rating is 

moderate. Mistletoe infections are considered to be moderate. Windthrow risk is high. All previous harvest areas adjacent to 

or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 15 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Part of the required legacy 

was placed to coincide with areas dropped for soils concerns. The remaining legacy was placed to reduce the size of the 

opening created by units 140 and 141, to reduce visibility from the Sandy Beach Rd. A total of about 15 acres are mapped 

as legacy. Any adjustments to the planned unit during implementation must consider the planned acreage and location of 

legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill yarding to landings 

on the proposed temporary road. Shovel settings are planned for yarding to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000195, totaling 5,200 feet, and proposed NFS road 3000197, totaling 900 feet, as 

displayed on the unit card. This road is also used to access Units 140 and 142. See road card for detailed information about 

the proposed NFS road. Approximately 2,400 feet of NFS road 3000195 will be constructed across decommissioned road 

bed. This unit is also accessed by two proposed temporary roads, totaling 2,200 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 141 Alternatives 2, 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 141

Streams drain to Clarence Strait. 

Stream#: 2.4R Class: II, III, IV Flagging: B/W, O/W, G/W C- Type: HCM, HCO 

Concerns: steep side-slopes with mobile fine sediment, active erosion

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. Class IV for HCO none. 

Alternatives: 2 and 3 Buffer (RAW): no review needed.

Protection: Category A, B and C

Stream#: 2 Class: I, II Flagging: B/W C- Type: HCM, HCD, MMS

Concerns: blowdown and active erosion; road influencing channel 

Buffer (RMA): Class I for HCM and Class II for HCD greater of 100 feet or to the top of the side-slope break. Class II for 

MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2 and 3 Buffer (RAW): no review needed. 

Protection: Category A, B and C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

Temporary roads for Unit 141: Alternatives 2, 3, and 4 -- 2 Class IV stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of about 28 acres of Low and 15 acres of Very Low. It is in 

Modified Landscape LUD and is mostly considered Middleground, but some is Seldom Seen. Much of the visible portions of 

the unit are in legacy patches, which screen part of the unit and reduce the size of the opening so that the SIO can be met. 

Typical opening sizes allowed by the Forest Plan in areas with Low SIO and Intermediate VAC are 40 to 60 acres.

 RECREATION:

Harvest in this unit would be heard from Sandy Beach Picnic Area. There are often 10 vehicles at this picnic area in the 

summer. This impact would be short-term and limited to the duration of harvest activities.

 SOILS/WETLANDS:

In the northern portion of the unit, slopes average 5 to 40%. The southern portion of the unit has slopes from 40 to 75%. All 

slopes greater than 72% in this unit have been excluded from harvest consideration. About 11 acres were excluded due to 

steep slopes and soil concerns. Forested wetlands are intermittent throughout the unit. The soils and wetlands are suitable 

for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact approximately 2 acres of forested wetland and about 1/4 acre of emergent short sedge/forested 

wetland complex within the unit. Wetland avoidance was not practicable due to the abundance of forested wetland. Provide 

adequate cross drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (nearly entire unit), some of which is also deep snow marten habitat/deer 

winter range (northern end of unit). Legacy standard and guideline applies in this VCU; Legacy acres cover some deer winter 

range and marten habitat.

Alternative 4: Unit dropped to maintain habitat values.
3000190

3000197

3000195

2.3R

2.6L

2.4R

2.7R

2.8R

2.5L

2.4R.1L

2

2.4R

2.2R.1 R

2

1992

1966

1995

140

141

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 141 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000190

3000197

3000195

2.3R

2.6L

2.4R

2.7R

2.8R

2.5L

2.4R.1L

2

2.4R

2.2R.1 R

2

1992

1966

1995

140

141

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 141 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 142

Total Unit

Acres:

53.4 Prescription: Clearcut

VCU

Number:

585,

 584

Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,300

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This area displays uneven-aged stand structure due to extensive repeated windthrow. The overstory 

consists primarily of western hemlock in an even distribution with multi-age cohorts. Overstory Sitka spruce and western 

redcedar are found in clumps primarily where windthrow has been less intense. Overall stand damages are moderate to high 

for all species. In the western hemlock stem decay is heavy to very heavy, while mistletoe is light to moderate. The average 

defect rating is moderate to high. Windthrow risk is high. All previous harvest areas adjacent to or near this unit have met 

green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 22 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to divide 

the opening created by units 142 and 143 into 3 openings, block up POG, and reduce required road length. Mapped legacy 

is currently about 20 acres and will be increased to at least 22 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill 

yarding to landings on the proposed temporary road, and proposed NFS road 3000195. Shovel settings are planned for 

yarding to the proposed temporary road. 

Alternative 5: This unit is planned for helicopter yarding to landings on existing NFS 3000190.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000195 in Alternatives 2,3 and 4, totaling 3800 feet, as displayed on the unit card. 

This road is also used to access Units 140 and 141. See road card for detailed information on the proposed NFS road. This 

unit is also accessed by a proposed temporary road in Alternatives 2,3, and 4, totaling 1300 feet, as displayed on the unit 

card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 142 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 142

 FISHERIES:

No streams found in unit at time of survey. If streams are found during implementations, a fish biologist would be notified 

and appropriate protections would be applied. 

Temporary roads for Unit 142: Alternatives 2, 3, and 4 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Low. It is in Modified Landscape LUD and is considered Middleground, 

but not readily seen from the Road 30000000. Much of the visible portions of the unit are in legacy patches, which screen 

part of the unit and reduce the size of the opening so the SIO can be met. Typical opening sizes allowed by the Forest Plan 

in areas with Low SIO and Intermediate VAC are 40 to 60 acres.

 RECREATION:

No concerns

 SOILS/WETLANDS:

The slopes range from less than 10 to 72%. Slopes are 10 to 35% in the southern half of the northern polygon. Forested 

wetlands are range from intermittent to dominant throughout the unit. The soils and wetlands are suitable for a minimum 

partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the 

shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not 

be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

Alternatives 2, 3, and 4: A temporary road will impact about 0.25 acre of forested wetland within the unit. Wetland avoidance 

was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and 

close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

Alternative 5: No road construction.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in these VCUs; Legacy 

acres cover some deer winter range.
3000192

3000190

3000197

3000195

3000193

4.7R

4.3

5.2L.2L

2.8R

5.2L

4.6L.1L

4

5.2L.2L.1R

4.6L

4

5.2L

2

4.6L

5.2L.

5

2L

1992

140

141

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 142 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

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3000192

3000190

3000197

3000195

3000193

4.7R

4.3

5.2L.2L

2.8R

5.2L

4.6L.1L

4

5.2L.2L.1R

4.6L

4

5.2L

2

4.6L

5.2L.

5

2L

1992

140

141

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 142 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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3000192

3000190

3000197

3000195

3000193

4.7R

4.3

5.2L.2L

2.8R

5.2L

4.6L.1L

4

5.2L.2L.1R

4.6L

4

5.2L

2

4.6L

5.2L.

5

2L

1992

140

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 142 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

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3000192

3000190

4.7R

4.3

5.2L.2L

2.8R

5.2L

4.6L.1L

4

5.2L.2L.1R

4.6L

4

5.2L

2

4.6L

5.2L.

5

2L

1992

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 142 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

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Unit 143

Total Unit

Acres:

59.0 Prescription: Clearcut

VCU

Number:

584,

 585

Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

1,112

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: The unit has old-growth structure. The overstory consists of primarily western hemlock and western 

redcedar with a minor component of Sitka spruce and Alaska-cedar. The dominant damage affecting tree health and volume 

loss is stem form (broken, dying or dead tops) and heavy patches of heart and stem decay. The overall defect rating for the 

entire unit is high/moderate. Overall the unit has marginal timber with generally high defect and many over mature trees that 

are exhibiting dead or dying tops. Windthrow risk is high. All previous harvest areas adjacent to or near this unit have met 

green-up with regeneration over 5 feet tall. This meets NFMA requirements for no longer being considered openings.

Unit includes small patch cuts (each about 1 to 2 acres in size) from a previous timber sale that is currently under contract 

(La Brea timber sale)

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to heavy stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 27 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to divide 

the opening created by units 142 and 143 into 3 openings, block up POG by building off RMAs, and reduce required road 

length. A total of about 31 acres of legacy are currently mapped in unit. Adjustments may need to be made because unit 

includes patch cuts (under contract) from a past timber sale. Any adjustments to the planned unit during implementation 

must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for shovel yarding. Shovel settings are planned for yarding to NFS road 3000193 

(both the existing and proposed portions). 

Alternative 5: This unit is planned for helicopter yarding to the existing NFS road 3000190 and shovel yarding to existing NFS 

road 3000193.

 ENGINEERING/ROADS:

Unit is accessed by existing NFS road 3000193 and proposed NFS road 3000193 (1,800 feet of new construction) as 

displayed on the unit card. See road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 143 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 143

Streams drain to Clarence Strait. 

Stream#: 5.3R Class: I, II, IV Flagging: B/W, G/W C- Type: HCO, MMO

Concerns: none 

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break. Class II for MMO greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and C 

Stream#: 5.1R Class: I, II Flagging: B/W C- Type: MMS, HCM

Concerns: none 

Buffer (RMA): Class I and II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Low. It is in Modified Landscape LUD and is considered Middleground, 

but not readily seen from the 30 Road. Much of the visible portions of the unit are in legacy patches, which screen part of the 

unit and reduce the size of the opening so the SIO can be met. Typical opening sizes allowed by the Forest Plan in areas 

with Low SIO and Intermediate VAC are 40 to 60 acres.

 RECREATION:

No concerns

 SOILS/WETLANDS:

Slopes average less than 26%. The entire unit is forested wetland (BMP 12.5). The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting. For shovel yarding, ensure puncheon or a slash 

mattress provides adequate bearing strength to prevent rutting on deep sapric soils. The puncheon trails should be scattered 

upon completion of yarding activities. Do not operate the shovel in muskeg or fen wetlands (BMPs 13.2 and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (very northern end of unit). Legacy standard and guideline applies in these VCUs; Legacy acres cover reduce opening 

size, block up POG by building off RMAs, reduce required road length, and include some deer winter range and marten 

habitat.
3000190

3000000

3000192

3000191

3000193

3000195

5.2L.2L

5.2L

4.7R

5.3R.1L

4.5R

5.2L.1L

4.6L.1L

5.3R.2L

4

5.2L.2L.1R

4.6L

5.3R.3L

5.4R

5.1R.2L

5.1R.3R

5.3 R

4.6L

5.1R

5 .2L.2L

5.1 R

5

4

5.2L

5

1992

1992

142

143

140

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 143 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000190

3000000

3000192

3000191

3000193

3000195

5.2L.2L

5.2L

4.7R

5.3R.1L

4.5R

5.2L.1L

4.6L.1L

5.3R.2L

4

5.2L.2L.1R

4.6L

5.3R.3L

5.4R

5.1R.2L

5.1R.3R

5.3 R

4.6L

5.1R

5 .2L.2L

5.1 R

5

4

5.2L

5

1992

1992

142

143

140

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 143 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000190

3000000

3000192

3000191

3000193

3000195

5.2L.2L

5.2L

4.7R

5.3R.1L

4.5R

5.2L.1L

4.6L.1L

5.3R.2L

4

5.2L.2L.1R

4.6L

5.3R.3L

5.4R

5.1R.2L

5.1R.3R

5.3 R

4.6L

5.1R

5 .2L.2L

5.1 R

5

4

5.2L

5

1992

1992

142

143

140

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 143 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000191

3000192

3000000

3000190

5.2L.2L

5.2L

4.7R

5.3R.1L

4.5R

5.2L.1L

4.6L.1L

5.3R.2L

4

5.2L.2L.1R

4.6L

5.3R.3L

5.4R

5.1R.2L

5.1R.3R

5.3 R

4.6L

5.1R

5 .2L.2L

5.1 R

5

4

5.2L

5

1992

1992

142

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 143 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584,585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 145

Total Unit

Acres:

2, 3, 5 - 28.9

4 - 40.2

Prescription: 2, 3, 5 - Clearcut

4 - 25% Removal

VCU

Number:

584 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 678

4 - 236 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The over story consists of a western hemlock and western 

redcedar mixture. Sitka spruce and Alaska-Cedar are lightly scattered. Damages and defects are moderate to high for all 

species, but especially high in the western Hemlock, which exhibit heavy stem decay, but rather light mistletoe infections. 

Windthrow risk is moderate. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 

5 feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut (Alternatives 2, 3, 5)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to heavy stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 13 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, reduce required road length, and reduce visibility of unit. Total mapped legacy equals about 13 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife. 

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding. Shovel settings are planned for yarding to the proposed temporary 

road. 

Alternatives 4, 5: This unit is planned for helicopter yarding to landings on the existing NFS road 3000190.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternatives 2 and 3, totaling 2,200 feet, as displayed on the unit card.

 BOTANY:

No Concerns

Unit

Number 145 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 145

 FISHERIES:

Streams drain to Cobble Creek. 

Stream#: 1 Class: I Flagging: B/W C- Type: MCM

Concerns: Blowdown and active erosion

Buffer (RMA): Class I for MCM greater of 100 feet or to the top of the side-slope break

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Alternative: 4 Buffer (RAW): no review needed.

Protection: Category A 

Stream#: 1.1L Class: I, II Flagging: B/W C- Type: MMO, MCO, HCO 

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I and II for MCO and HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A 

Stream#: 1.1L.2L Class: II Flagging: B/W C- Type: HCO 

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 142: Alternatives 2 and 3 -- One Class I stream crossing and one Class II stream crossing. The 

temporary roads have not been field verified and will be surveyed before implementation. Crossing structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). The Class 

I and II stream crossings will be designed to provide fish passage, using a log culvert or bridge, will be installed under current 

timing constrictions and concurrence from the State will be solicited prior to starting the work. During construction of 

temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low. It is in Modified Landscape LUD but is considered Seldom 

Seen. There are no scenery resource concerns.

 RECREATION:

No concerns.

 SOILS/WETLANDS:

Slopes range from 10 to 50%. The steep slopes are located near southern boundary. Forested wetlands generally occupy 15 

to 40% of the unit. 

Alternatives 2 and 3: The soils and wetlands are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 

and 13.9. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. For shovel yarding, the use of 

puncheon or a slash mattress would be required to provide adequate bearing strength and prevent rutting on poorly drained 

soils in the unit. The puncheon trails should be scattered upon completion of yarding activities. Areas of poorly drained soils 

should be avoided where possible. Do not operate the shovel in muskeg or fen wetlands (BMPs 13.2 and 13.9).

Alternatives 2 and 3: A temporary road will impact 1 acre of forested wetland within the unit and about 1/2 acre outside the 

unit. Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, 

remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6). 
Unit 145

Alternatives 4 and 5: A minimum of partial suspension will meet soil and wetland concerns (BMPs 12.5, 13.5, and 13.9). No 

road construction is planned.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), most of which is also deep snow marten habitat/deer winter range 

(southern 3/4 of unit). Legacy standard and guideline applies in this VCU; Legacy acres serve to block up POG, reduce 

required road length, and cover some deer winter range and marten habitat.

Alternative 4: Prescription is 25% basal area removal to maintain habitat values and connectivity. No Legacy acres required 

because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
3000190

3000200

3000215

3000000

3000191

3000210

1.1L.2L

1.2R.1L

1.1L

1.1R

1

1

5.1R

1.2L

1.1L

1.1L

1.2L

1.1L.1L

1.1L.3L

1.2R

1.1L.1R

1.2R

1992

1966

1966

1966

1997

1974

1968

145

146

146

147

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 145 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000190

3000000

3000191

3000200

3000215

3000210

3000215

1.2R.1L

1.1L

1.1R

1

1

5.1R

1.2L

1.1L

1.1L

1.2L

1.1L.1L

1.1L.3L

1.2R

1.1L.1R

1.2R

1.1L.2L

1992

1966

1966

1968

1997

1974

1966

145

146

147

372

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 145 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000190

3000215

3000000

3000191

3000200

3000210

1.2R.1L

1.1L

1.1R

1

1

5.1R

1.2L

1.1L

1.1L

1.2L

1.1L.1L

1.1L.3L

1.2R

1.1L.1R

1.2R

1.1L.2L

1992

1966

1966

1966

1997

1974

1968

145

146

146

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 145 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000190

3000191

3000200

3000215

3000000

3000210

1.2R

1.1L.2L

1.2R.1L

1.1L

1.1R

1

1

5.1R

1.2L

1.1L

1.1L

1.2L

1.1L.1L

1.1L.3L

1.2R

1.1L.1R

1992

1966

1966

1966

1997

1974

1968

145

146

146

147

372

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 145 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 146

Total Unit

Acres:

13.7 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

301

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory species composition consists primarily of western 

redcedar and western hemlock. There is moderate to high stem decay. Damages are generally moderate, but high in larger 

trees of both species. Mistletoe is light to moderate. Windthrow risk is moderate. All of the past harvests around the unit have 

met green-up with regeneration over 5' tall.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to heavy stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 6 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG and reduce need for a road. Total mapped legacy equals about 6 acres. Any adjustments to the planned unit 

during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 3000200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Cobble Creek.

Stream#: 1.2R Class: I, IV Flagging: B/W, G/W C- Type: HCO 

Concerns: none

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break. Class IV HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 146 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 146

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objectives (SIOs) for this unit are Very Low and Low. It is in Modified Landscape LUD and is mostly 

considered Seldom Seen (5 acres are Middleground). There are no scenery resource concerns.

 RECREATION:

No concerns.

 SOILS/WETLANDS:

Slopes average 5 to 20%. Forested wetlands generally occupy 15 to 40% of the unit (BMP 12.5). The soils and wetlands are 

suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should 

avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel 

yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid 

track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; Legacy acres 

block up POG, eliminate need for a road, and cover some deer winter range.
3000200

3000190

3000000

3000215

3000210

1.1L

3

1.1L

1

1.1R

1

1

1

1.1L

1. 4L

1.2L

1.1L.1L

1.1L.3L

1.3L

1.2R

1.1L.1R

1.2L

3

1.2R

1.1L.2L

1.2R.1L

1992

1966

1992

1968

1966

1997

1974

1966

146

146

147

148

145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 146 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000215

3000200

3000190

3000000

3000210

3000215

3

1.1L

1

1.1R

1

1

1

1.1L

1. 4L

1.2L

1.1L.1L

1.1L.3L

1.3L

1.2R

1.1L.1R

1.2L

3

1.2R

1.1L.2L

1.2R.1L

1.1L

1992

1966

1992

1966

1997

1974

1966

1968

146

147

148

372 145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 146 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000190

3000000

3000215

3000200

3000210

3

1.1L

1

1.1R

1

1

1

1.1L

1. 4L

1.2L

1.1L.1L

1.1L.3L

1.3L

1.2R

1.1L.1R

1.2L

3

1.2R

1.1L.2L

1.2R.1L

1.1L

1992

1966

1992

1968

1966

1997

1974

1966

146

146

148

145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 146 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000215

3000200

3000190

3000000

3000210

1.2R.1L

1.1L

3

1.1L

1

1.1R

1

1

1

1.1L

1. 4L

1.2L

1.1L.1L

1.1L.3L

1.3L

1.2R

1.1L.1R

1.2L

3

1.2R

1.1L.2L

1992

1966

1992

1968

1966

1997

1974

1966

146

146

147

148

372 145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 146 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 147

Total Unit

Acres:

16.6 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

205

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit is predominantly old-growth stand structure with areas of uneven-age structure. The overstory 

consists primarily of a mixture of western redcedar and lesser amounts of western hemlock found in a patchy distribution. 

The unit has high defect resulting from over-maturity. The main damage agents affecting tree health and volume loss is stem 

decay and dead/dying tops particularly in the western redcedar. Overall the overstory is very marginal value due to low 

stocking and high defect. The largest diameter trees of most species have high defect and many are cull. Windthrow risk is 

moderate. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This 

meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the original unit is less than 20 acres therefore no legacy setaside is required.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for shovel yarding to the proposed temporary road and existing NFS road 3000210. 

Alternative 5: This unit is planned for a combination of helicopter and shovel yarding in Alternative 5. Shovel settings are 

planned for yarding to the existing NFS road 3000120. Helicopter settings are planned for yarding to landings on the existing 

NFS road 3000210.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2, and 3, totaling 900 feet, as displayed on the unit card. 

Approximately 200 feet of this road will be constructed across decommissioned road bed. Reconstruction of existing NFS 

road 3000210, totaling 1400 feet, will be required to provide access to the unit. This road is also used to access Unit 148. 

See road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 147 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 147

Streams are tributaries to Sal Creek. 

Stream#: 1 Class: I, II, III Flagging: B/W, O/W C- Type: MMS, HCL, HCM 

Concerns: none 

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for HCL and Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the 

top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and B 

Stream#: 1.1L Class: I, III Flagging: B/W, O/W C- Type: MMO, HCM

Concerns: none 

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM to the top of the side-slope break 

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and B 

Stream#: 1.4L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none 

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and C 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 147: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. The new temporary road will include reopening a decommissioned 

road. If any stream crossings are found, crossings structures and locations will be approved by USFS, in consultation with 

fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement BMPs 

12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Very Low and Low. It is in Modified Landscape LUD and is mostly 

considered Not Seen (5 acres are Middleground). There are no scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

Slopes range from nearly level to about 65%. Intermittent forested wetlands are located in the unit. The soils and wetlands 

are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator 

should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

A temporary road will impact about 0.5 acres of forested wetland within the unit. About an additional 0.25 acres of forested 

wetland outside of the unit will be impacted by a temporary road needed to access the unit. Wetland avoidance was not 

practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the 

road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6). 

Alternative 5:

A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:
Unit 147

Unit includes average snow deer winter range (northern half of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped to maintain habitat values and reduce road building.
3000200

3000210

3000215

3000210

1.1L

3

2

4

1.1R

1 1

1

1L

8

2

1. 4L

1.5R

1.3L

1.2R

1.2L

3.1L

3

1

1.2R

1.2R.1L

1966

1966

1992

1966

1968

1997

1966

146

146

147

148

149

145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 147 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000200

3000210

3000210

3000215

1.1L

3

2

4

1.1R

1 1

1

1L

8

2

1. 4L

1.5R

1.3L

1.2R

1.2L

3.1L

3

1

1.2R

1.2R.1L

1966

1966

1992

1966

1968

1997

1966

146

147

148

149

372

145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 147 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000200

3000210

3000215

3000210

1.2R.1L

1.1L

3

2

4

1.1R

1 1

1

1L

8

2

1. 4L

1.5R

1.3L

1.2R

1.2L

3.1L

3

1

1.2R

1966

1966

1992

1966

1968

1997

1966

146

146

147

148

149

372

145

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 147 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 148

Total Unit

Acres:

57.9 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

886

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists of western redcedar, western hemlock 

and Alaska-cedar. Sitka spruce are more scattered and considered to be secondary species in the unit. Major damages that 

are affecting tree health and volume loss are heart rot, stem decay, broken and dead tops and active Alaska-cedar decline. 

This unit has low volume, open canopy, higher than normal defect and lower value timber. Windthrow risk is moderate. All 

previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high stem decay and defect resulting in a situation where stand growth is 

being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, 

promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 25 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, reduce visibility of unit in low VAC area from 30 road, and improve economics. Total mapped legacy is 

approximately 26 acres. Any adjustments to the planned unit during implementation must consider the planned acreage and 

location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill and downhill yarding 

to landings on the proposed temporary roads. Shovel settings are planned for yarding to the proposed temporary roads and 

existing NFS road 3000210.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads, totaling 1,600 feet, as displayed on the unit card. Unit is also accessed 

by reconstruction of existing NFS road 3000210, totaling 3,200 feet. This road is also used to access Unit 147. See road card 

for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Sal Creek. 

Stream#: 1 Class: I, II, III Flagging: B/W, O/W C- Type: MMS, HCL, HCM 

Concerns: blowdown and active erosion 

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetlands. 

Class I for HCL and Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of 

the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: 3 Class: II , IV Flagging: B/W, G/W C- Type: HCO 

Unit

Number 148 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 148

Concerns: none 

Buffer (RMA): Class II for HCO greater of 100 feet or to thet op of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C

Stream#: 3.1L Class: II, IV Flagging: B/W, G/W C- Type: HCO 

Concerns: none 

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 8 Class: III , IV Flagging: B/W, G/W C- Type: HCO 

Concerns: none 

Buffer (RMA): Class III for HCO to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 148: All Alternatives -- One Class IV stream crossing. The temporary roads have not been field 

verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of 40 acres of Low and 18 acres of Very Low. It is in Modified 

Landscape LUD and is partially Not Seen but mostly in Middleground. The upper, more visible slopes of the original unit 

were desginated as legacy. There are no scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

Slopes range from 15 to 65%. Intermittent forested wetlands occur within the unit. The soils and wetlands are suitable for 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

Based on GIS analysis, the proposed temporary roads do not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU. Legacy acres 

block up POG and cover some deer winter range.
3000210

3000000

3000200

3000215

3000210

A9

1.2R

1.1L

3

4

1 1

1

5

2

9

A2

1. 4L

1.5R

1.6L

1

1.3L

1.2L

3.1L

3

10

A1

8

1966 1969

1966 1966

1992

1966

1968

1966

1997

147

148

149

146

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 148 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000200

3000210

3000210

3000215

8

A9

1.1L

3

4

1

1

1

1

5

2

9

A2

1. 4L

1.5R

1.6L

1.2R

1.3L

1.2L

3.1L

3

10

A11966 1969

1966 1966

1968

1992

1966

1997

1966

147

148

149

544

146

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 148 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000210

3000000

3000200

3000215

3000210

A9

1.2R

1.1L

3

4

1 1

1

5

2

9

A2

1. 4L

1.5R

1.6L

1

1.3L

1.2L

3.1L

3

10

A1

8

1966 1969

1966 1966

1992

1966

1968

1966

1997

148

149

544

146

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 148 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

3000200

3000215

3000210

3000210

8

A9

1.1L

3

4

1

1

1

1

5

2

9

A2

1. 4L

1.5R

1.6L

1.2R

1.3L

1.2L

3.1L

3

10

A11966 1969

1966 1966

1968

1992

1966

1997

1966

147

148

149

544

146

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 148 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 149

Total Unit

Acres:

110.8 Prescription: 25% Removal

VCU

Number:

584

0

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

483

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: The unit has uneven-aged structure. The overstory consists of western hemlock mixed with Sitka spruce 

and mountain hemlock. Alaska-cedar and western redcedar are also present as lessor components. The dominant damage 

agent is stem decay and stem form deformities. Exposure to heavy weather is evident in the overstory tree crowns and 

expressed as stunted foliage and spike tops. Mistletoe was generally not a concern. Portions of the unit with south and east 

aspect have the appearance of being even-aged with western hemlock being the dominate overstory component. Windthrow 

risk is high. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This 

meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Because of the large size and visibility of the unit, uneven-age management was selected as the silvicultural system to 

eliminate moderate to large openings and reduce the visibility of harvest. 75 percent retention was selected because of high 

windthrow risk. Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the 

unit, uncut. Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the 

stand. Any small groups will usually be less than 1 acre but may occasionally go up to 2 acres in size where needed to 

address insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected 

for harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

Legacy is required in this VCU. However, no legacy acres are required for uneven-aged management because adequate 

structure is retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS roads 3000200 and 3000210.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Sal Creek and Cobble Creek. Stream A1 characteristics do not contain project specific, field 

verified information.

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO 

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Unit

Number 149 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 149

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 8 Class: III , IV Flagging: O/W, G/W C- Type: HCO 

Concerns: none 

Buffer (RMA): Class III for HCO to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 10 Class: III , IV Flagging: O/W, G/W C- Type: HCM, HCO 

Concerns: none 

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 3 Class: III , IV Flagging: O/W, G/W C- Type: HCM, HCO 

Concerns: none 

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM 

Concerns: none 

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, 4 and 5 Buffer (RAW): no review needed

Mitigation/Protection: Category B 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of 95 acres of Low and 16 acres of Very Low. It is in Modified 

Landscape LUD and is mostly in Middleground. The uneven-aged management prescription for this unit eliminates any 

scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

Slopes range from 25 to greater than 90%. About 71 acres were excluded from harvest consideration due to very high 

landslide potential, MMI4 soils, high colluvial activity, active and historic landslides, and extremely steep wet slopes adjacent 

to a steep v notches. There are about 6 acres of slopes greater than 72% that are still suitable for harvest with full 

suspension. Intermittent sub-alpine muskegs occur along the fringe of the upper unit boundaries (BMP 12.5). Full 

suspension and partial harvest would be required in the units to protect soils and wetlands (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (sliver in northern portion of unit). Legacy standard and guideline applies in this VCU; however no legacy acres 

required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 

20 acres).
3020000

3000210

3000200

3000210

2

A3

7

4

A3.1R

1.3L

1

A1

A9

2

9

1 .4 L

1.2L

4

1.5R

1.6L

2

2.1L

1

5

6

3.1L

3

A1

3

10

1

8

A3

3

1966

1966

1992

1968

1992

1997

1966

1966

148

149

147

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 149 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000200

3020000

3000210

3000210

3

2

A3

7

4

1

A3.1R

1

A1

A9

2

9

1 .4 L

1.2L

4

1.5R

1.6L

2

2.1L

5

1.3L

6

3.1L

3

A1

3

10

1

8

A3 1966

1966

1992

1968

1966

1992

1966

1997

148

149

545

147

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 149 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3020000

3000210

3000200

3000210

2

A3

7

4

A3.1R

1.3L

1

A1

A9

2

9

1 .4 L

1.2L

4

1.5R

1.6L

2

2.1L

1

5

6

3.1L

3

A1

3

10

1

8

A3

3

1966

1966

1992

1968

1992

1997

1966

1966

149

545

148

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 149 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000200

3020000

3000210

3000210

3

2

A3

7

4

1

A3.1R

1

A1

A9

2

9

1 .4 L

1.2L

4

1.5R

1.6L

2

2.1L

5

1.3L

6

3.1L

3

A1

3

10

1

8

A3 1966

1966

1992

1968

1966

1992

1966

1997

148

149

545

147

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 149 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 153

Total Unit

Acres:

46.9 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

930

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory is mostly western hemlock and western redcedar. 

Sitka spruce are scattered. Moderate to high stem form defects and stem decay are present. Mistletoe was rated as 

moderate. Windthrow risk is moderate. The unit has over-mature timber with declining growth. All adjacent past harvest 

areas meet NFMA requirements for green-up. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high stem decay and defect resulting in a situation where stand growth is 

being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, 

promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 20 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Upper legacy was placed to 

block up POG, reduce visibility of higher slopes, and improve economics. Lower legacy was placed to reduce visibility, build 

off Class 2 RMA complex, and block up POG. Total mapped legacy equals about 20 acres. Any adjustments to the planned 

unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3: This unit is planned for a combination of cable and shovel yarding. Shovel settings are planned for yarding 

to the existing NFS road 3000270. Cable settings are planned for uphill yarding to landings on the proposed NFS road 

3000273 and proposed temporary road. 

Alternative 5: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding 

to the existing NFS road 3000270. Helicopter yarding is planned to landings on the existing NFS roads 3000272 & 3000270.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000273 in Alternatives 2 and 3, totaling 1400 feet, as displayed on the unit card. 

See road card for detailed information. Unit is also accessed by a proposed temporary road in Alternatives 2 and 3, totaling 

300 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 153 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 153

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 1 Class: I, II Flagging: B/W C- Type: MMM, HCM 

Concerns: blowdown, and heavy braiding 

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCM greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed 

Protection: Category A 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

Temporary roads for Unit 153: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of 5 acres of Moderate, 18 acres of Low and 24 acres of Very Low. 

It is in Modified Landscape LUD and is in Foreground, Middleground, and Not Seen. Legacy polygons have substantially 

reduced the harvest in Moderate and Low SIOs relative to the original unit. No addtiional scenery resource concerns.

 RECREATION:

No concerns.

 SOILS/WETLANDS:

Slopes average 55%. There is about 1⁄2 acre of slopes greater than 72% that is suitable to for partial suspension. 

Forested wetlands cover nearly the entire 47-acre unit (BMP 12.5). Forested wetlands occur through most of the unit. The 

soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow 

BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent 

rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road would impact about 1/3 acre of forested wetlands. Wetland avoidance was not practicable due to the 

abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the road after harvest (BMP 

14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western/northern portion of unit). 

Alternatives 2, 3, and 5: Legacy standard and guideline applies in this VCU. No Legacy acres required because adequate 

structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

Alternative 4: Unit dropped to maintain habitat values.
3000270

3000271

3000272

3000271

3000000

3000273

1.2L.1 L 1.2L.1R

1.2L

1.1L

1.2L.1R.1L

1.6R

1.5L

1.3L

7

1.1R

1 4. R

1.2R

1

4

1

3

5

1

A1

1993

1993

1993

1993

1994

153

154

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 153 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000272

3000271

3000270

3000271

3000273

3

5

1

A1

1.2L.1 L 1.2L.1R

1.2L

1.1L

1.2L.1R.1L

1.6R

1.5L

1.3L

7

1.1R

1 4. R

1.2R

1

4

1

1994

1993

1993

1993

1993

154

452

454

455

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 153 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000270

3000271

3000272

3000271

3000000

1.2L.1 L 1.2L.1R

1.2L

1.1L

1.2L.1R.1L

1.6R

1.5L

1.3L

7

1.1R

1 4. R

1.2R

1

4

1

3

5

1

A1

1993

1993

1993

1993

1994

153

154

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 153 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 154

Total Unit

Acres:

90.3 Prescription: 2, 3, 5 - 50% 

Removal

4 - 25% Removal

VCU

Number:

584 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 898

4 - 449 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 154 has old-growth stand structure. Western hemlock is the dominant overstory species. Sitka 

spruce and western redcedar are lesser components. Overall the average defect rating is moderate. The main damage agent 

affecting tree health and volume is stem form and stem rot. Spotty mistletoe occurs across the unit. Windthrow risk is 

moderate. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This 

meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Because of the large size and visibility of the unit, uneven-age management was selected as the silvicultural system to 

eliminate moderate to large openings and reduce the visibility of harvest. Maintain at least 50 percent in Alternatives 2, 3, 

and 5, and 75 percent in Alternative 4 of the setting pretreatment basal area, based on standing live tree total for the unit, 

uncut. 50 percent retention was selected for Alternative 2, 3, and 5 because windthrow risk is moderate and 75 percent 

retention was selected for Alternative 4 because of wildlife concerns. Individual trees selected for harvest may occur in small 

groups but will generally be evenly distributed across the stand. Any small groups will usually be less than one acre but may 

occasionally go up to two acres in size where needed to address insect and disease issues or capitalize on existing 

advanced regeneration of desirable tree species. Trees selected for harvest will generally be well distributed and no large 

openings will occur as a result of the harvest. Review the marking guides and silvicultural prescription for more detailed 

information and direction regarding how to implement this prescription.

Legacy is required in this VCU. However, no legacy acres are required for uneven-aged management because adequate 

structure is retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3000272.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream A1 characteristics do not contain project specific field verified information.

Stream#: 4 Class: III, IV Flagging: O/W, G/W C- Type: HCL, HCO

Concerns: blowdown, active erosion, heavy scouring with abundant substrate piles

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5		 Buffer (RAW): no review needed. 

Protection: Category B and C

Stream#: 3 Class: III, IV Flagging: O/W, G/W C- Type: HCL, HCO

Concerns: blowdown and active erosion 

Buffer (RMA): III for HCL to the top of side-slope break. Class IV for HCO none

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

Unit

Number 154 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 154

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: MCS, MMO

Concerns: none

Buffer (RMA): Class III for MCS to the top of the side-slope break. Class IV for MMO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion 

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM 

Concerns: none known 

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Low. It is in Modified Landscape LUD and is in Middleground. The 

uneven-aged management prescription for this unit eliminates any scenery resource concerns.

 RECREATION:

No concerns.

 SOILS/WETLANDS:

Slopes range from 10 to about 80%. About 2 acres of slopes greater than 72% are included in the unit that are suitable for 

harvest with full suspension. Retain trees around the perimeter and the headwall of the landslide in the central-south area of 

the unit to prevent further erosion. About 21 acres were excluded due to due to colluvial activity on the soil surface, extremely 

steep slopes, steep wet slopes, multiple incisions, and MMI4 soils. No wetlands were identified in the unit. Full suspension is 

required for about 90 acres through the center of the unit. In the remainder of the unit, a minimum of partial suspension is 

required to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northeastern half of unit). Legacy standard and guideline applies in this VCU. No legacy acres required because 

adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

Alternative 4: Prescription is 25% basal area removal to maintain connectivity and other habitat values.
3000000

3000272

3000273

4

3

A1

4

A4 1. R

A4.1R

2 1. L

1

2.2L 3.2L

3

3.1L

2

2

2

4.1L

4

2

3.2L

A4.1L

A2

A1

A3

3

A4

1964

1964

1993

1993

154

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 154 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000272

3000273

A4

4

3

A1

4

A4 1. R

A4.1R

2 1. L

1

2.2L 3.2L

3

3.1L

2

2

2

4.1L

4

2

3.2L

A4.1L

A2

A1

A3

3

1964

1964

1993

1993

154

546

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 154 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3000272

A4

4

3

A1

4

A4 1. R

A4.1R

2 1. L

1

2.2L 3.2L

3

3.1L

2

2

2

4.1L

4

2

3.2L

A4.1L

A2

A1

A3

3

1964

1964

1993

1993

546

154

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 154 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

3000272

3

A4

4

3

A1

4

A4 1. R

A4.1R

2 1. L

1

2.2L 3.2L

3

3.1L

2

2

2

4.1L

4

2

3.2L

A4.1L

A2

A1

A3

1964

1964

1993

1993

154

546

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 154 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 158

Total Unit

Acres:

37.9 Prescription: 25% Removal

VCU

Number:

583,

 584

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

223

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: The unit predominantly old-growth stand structure. The overstory consists of western hemlock, western 

redcedar and Sitka spruce with some areas of Alaska-cedar. Stem decay is moderate on average. Mistletoe is light. 

Windthrow risk is high. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 

feet tall. This meets NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Because of the moderate size and visibility of the unit, as well as timber economics/silviculture concerns, uneven-age 

management was selected as the silvicultural system to eliminate moderate to large openings and reduce the visibility of 

harvest. 75 percent retention was selected because of high windthrow risk.

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

The legacy standard and guide applies in this VCU. No legacy acres required for uneven-aged management because 

adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternatives 3, 4: This unit is planned for helicopter yarding to landings on existing NFS road 3023000.

Alternatives 2, 5: This unit is planned for helicopter yarding to landings on existing NFS road 3000300.

 ENGINEERING/ROADS:

This unit is accessed by reconstruction of existing NFS road 3023000 in Alternatives 3 and 4, totaling 10,200 feet. See road 

card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 158 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 158

Streams are tributaries to Little Ratz Creek. 

Stream#: 10 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 13 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 16 Class: III, IV Flagging: O/W, G/W C- Type: HCL, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of 10 acres of Low and 27 acres of Very Low. It is in Modified 

Landscape LUD and is partially in Middleground, but mostly Seldom Seen. The uneven-aged management prescription for 

this unit eliminates any scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

Slopes range from about 35 to 100%. All slopes over 72% are located in the soil exclusion area. About 15 acres were 

excluded due colluvial activity on the soil surface, active and historic landslides, extremely steep and wet slopes, and MMI4 

soils. The remainder the unit is suitable for harvest with full suspension. Forested wetlands were identified throughout the 

units but do not exceed 15% of the area. Full suspension would be required in the unit to protect soils and wetlands (BMPs 

12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in these VCUs; however, 

no legacy acres required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no 

openings larger than 20 acres).
3023000

3023000

3023500

3023300

2

13

1

2

A1.7L

A1

1

31

A10

A1

1

13.1L

2

2.4L

12

32

21

2.2L

1

17

2.3L

3

2.1L

11

2.5L.1R

20

22

1.1L

26

15

14

11.1L

16

302-2

10

24

2.6 L

2.5L

23

A1.1L.1L

2.7L

1

25

1999

1966

1959

1999

1966

1964

1999

1995

1999

159

162

162

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 158 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023500

3023300

3023000

3023000

25

2

13

1

2

A1.7L

A1

1

31

A10

A1

1

13.1L

2

2.4L

12

32

21

2.2L

1

17

2.3L

3

2.1L

11

2.5L.1R

20

22

1.1L

26

15

14

11.1L

16

302-2

10

24

2.6 L

2.5L

23

A1.1L.1L

2.7L

1

1966

1999

1959

1999

1999

1995

1999

1966

1964

159

162

547

551

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 158 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023500

3023300

3023000

3023000

1

25

2

13

20

2

A1.7L

1

A1

31

A10

A1

1

13.1L

2

2.4L

12

32

21

2.2L

1

17

2.3L

3

2.1L

11

2.5L.1R

1

22

1.1L

26

15

14

11.1L

16

302-2

10

24

2.6 L

2.5L

23

A1.1L.1L

2.7L

1999

1959

1999

1999

1966

1966

1999

1964

1995

159

162

162

547

551

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 158 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023000

3023500

3023300

3023000

1

25

2

13

1

2

A1.7L

2.5L.1R

A1

31

A10

A1

1

13.1L

2

2.4L

12

32

21

2.2L

1

17

2.3L

3

2.1L

11

20

1

22

1.1L

26

15

14

11.1L

16

302-2

10

24

2.6 L

2.5L

23

A1.1L.1L

2.7L

1966

1999

1959

1999

1999

1966

1995

1964

1999

159

162

162

551

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 158 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 159

Total Unit

Acres:

53.5 Prescription: 25% Removal

VCU

Number:

583,

 584

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

450

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: The unit has varying stand structure with predominantly old-growth characteristics. The overstory consists 

primarily of western hemlock and Sitka spruce with areas of western redcedar and Alaska-cedar. Stem decay and butt rot are 

the main concerns. Overall average defect rating for all plots combined is high with moderate patches. Windthrow risk is 

high. All previous harvest areas adjacent to or near this unit have met green-up with regeneration over 5 feet tall. This meets 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection:

Because of the moderate size and visibility of the unit, as well as timber economics/silviculture and wildlife concerns, unevenage management was selected as the silvicultural system to eliminate moderate to large openings and reduce the visibility of 

harvest. Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, 

uncut. Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the 

stand. 75 percent retention was selected because of high windthrow risk.Any small groups will usually be less than one acre 

but may occasionally go up to two acres in size where needed to address insect and disease issues or capitalize on existing 

advanced regeneration of desirable tree species. Trees selected for harvest will generally be well distributed and no large 

openings will occur as a result of the harvest. Review the marking guides and silvicultural prescription for more detailed 

information and direction regarding how to implement this prescription.

This is a legacy VCU. However, no legacy acres required for uneven-aged management because adequate structure 

retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS roads 3000300 & 3023500.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. Stream A1.3L, 3, A1.5L characteristics do not contain project specific field verified 

information.

Stream#: A1.3L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B 

Stream#: 3 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Unit

Number 159 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 159

Stream#: A1.5L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCD, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM and HCD to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

 

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C

Stream#: 20 Class: III , IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit is Low. It is in Modified Landscape LUD and is in Middleground. The 

uneven-aged management prescription for this unit eliminates any scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

Slopes range from nearly level to about 100%. The steep slopes are located in the soil exclusion area. About 61 acres were 

excluded due to steep slopes, slope failures, and soil concerns. The remainder the unit is suitable for harvest with full 

suspension. Forested wetlands were identified throughout the units but do not exceed 15% of the area. Full suspension 

would be required in the unit to protect soils and wetlands (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern end of unit). Legacy standard and guideline applies in these VCUs. No Legacy acres required because 

adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres.
3023520

3023521

3000300

3023500

A1

1.18R.

10

2

21

3.1R

302-2

3

LAKE A1

20

1

A1.7L

A1.3L

A1.4L

A1.5L

1

1999

1966

1959

1960

1960

1999

1966

158

159

160

161

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 159 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023500

3000300

3023521

3023520

3

LAKE A1

20

1

A1.7L

A1.3L

A1.4L

A1.5L

1

A1

1.18R.

10

2

21

3.1R

302-2

1999

1966

1959

1960

1966

1999

1960

159

160

161

550

551

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 159 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023520

3023521

3000300

3023500

A1

1.18R.

10

2

21

3.1R

302-2

3

LAKE A1

20

1

A1.7L

A1.3L

A1.4L

A1.5L

1

1999

1966

1959

1960

1960

1999

1966

158

159

550

551

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 159 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023500

3000300

3023521

3023520

3

LAKE A1

20

1

A1.7L

A1.3L

A1.4L

A1.5L

1

A1

1.18R.

10

2

21

3.1R

302-2

1999

1966

1959

1960

1966

1999

1960

159

160

161

550

551

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 159 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 160

Total Unit

Acres:

49.3 Prescription: Clearcut and 

50% Removal

VCU

Number:

584 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

845

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 160 has old-growth stand structure. The overstory consists of a mixture of western hemlock, western 

red and Alaska-cedar and Sitka spruce. Sitka spruce are widely spaced throughout. The main damage agent affecting tree 

health and volume is moderate stem decay. Stem form defects are also common. Overall the average defect rating is 

moderate. Windthrow risk is low. All previous harvest areas adjacent to or near this unit have met green-up with regeneration 

over 5 feet tall. This meets NFMA requirements for no longer being considered openings. 

A Tongass Wide Young Growth Study site (POW Little Ratz Experiment #4) is along the northern boundary of this unit. 

Protection of this site is required. Contact the Forestry Sciences Lab in Juneau for additional information. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Shovel and Cable Settings)

The lower portions of the unit are being recommended for harvest at this time because this stand is not expected to obtain 

the desired condition given the current growth trajectory. This stand is mature with moderate stem decay and defect resulting 

in a situation where stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or 

minimize the risk of windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect 

and disease in the future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. Based on the size of clearcut opening, this requires that approximately 9 

acres of productive old growth representative of the overall composition of the planned harvest area be maintained 

indefinitely. Legacy was placed to build off RMAs, divide the opening in two, and incorporate unsuitable soils. The upper 

portion of unit is to have partial harvest. A total of about 11 acres is currently mapped as legacy. Any adjustments to the 

planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Helicopter Settings)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

Uneven-age management single tree selection was prescribed in the helicopter settings, which were located upslope, to 

reduce the visual impacts of harvest in those areas.

 TIMBER/LOGGING:

This unit is planned for a combination of cable, shovel and helicopter yarding. Cable settings are planned for uphill and 

downhill yarding to landings on the existiing NFS road 3000300. Shovel settings are planned for yarding to the existing NFS 

road 3000300. Helicopter settings are planned for yarding to landings on the existing NFS road 3000300.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 160 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 160

 FISHERIES:

Streams are tributaries to Ratz Creek.

Stream#: 1 Class: II Flagging: B/W C- Type: MCM, FPLr

Concerns: blowdown

Buffer (RMA): Class II for MCM greater of 100 feet or to the top of the side-slope break. Class II for FPLr greater of 130 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A 

Stream#: 1.14R Class: II, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: blowdown

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C 

Stream#: 1.15R Class: II , IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: blowdown

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C

Stream#: 1.15R Class: II , IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: blowdown

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 1.18R Class: II , III Flagging: B/W, O/W C- Type: HCL, HCD

Concerns: blowdown

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL and HCD greater of 

100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The Scenic Integrity Objective (SIO) for this unit consists of 25 acres of Low and 24 acres of Very Low. It is in Modified 

Landscape LUD and is partially in Middleground and partially Seldom Seen. The uneven-aged management prescription for 

the upper slopes and the small opening size in visible areas eliminates any scenery resource concerns.

 RECREATION:

No concern.

 SOILS/WETLANDS:

In the southern portion of the unit, slopes range from 50 to 100%. All slopes exceeding 72% are located in the soil exclusion 

area. About 4 acres were excluded due to colluvial activity on the soil surface, historic landslides, steep slopes, and MMI4 

soils. There is a partially revegetated debris avalanche along the eastern boundary of the soil exclusion area. No wetlands 

were observed in the unit. Shovel yarding is only suitable below the road. In the remainder of the unit, a minimum of partial 

suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).
Unit 160

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU to clearcut 

portion of unit . Positioning of Legacy acres covers some deer winter range.

Alternative 4: Unit dropped to help maintain connectivity to POG near the beach and other habitat values.
3000300

3023200

3000295

3023000

3023000

1.18R

A5.3L

1.10R.1L

1.10 R

1

.1R

3

1.16R

A5 3. L.1R

A5

1.15R

1.17R

A5.2L

1.18R.1L

54

1.10R.1L.1L

1.12R

52

1.11R

53

51

1.13R

1.14R

A2

1965

1964

1997

1964

1998

1966

1999

160

161 159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 160 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000300

3000295

3023000

3023200

1.14R

A2

1.18R

A5.3L

1.10R.1L

1.10 R

1

.1R

3

1.16R

A5 3. L.1R

A5

1.15R

1.17R

A5.2L

1.18R.1L

54

1.10R.1L.1L

1.12R

52

1.11R

53

51

1.13R

1965

1964

1997

1964

1998

1966

1999

160

161

546

549

159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 160 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000300

3023000

3023000

3023200

3000295

1.14R

A2

1.18R

A5.3L

1.10R.1L

1.10 R

1

.1R

3

1.16R

A5 3. L.1R

A5

1.15R

1.17R

A5.2L

1.18R.1L

54

1.10R.1L.1L

1.12R

52

1.11R

53

51

1.13R

1965

1964

1997

1964

1998

1966

1999

160

161

546

549

159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 160 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 161

Total Unit

Acres:

99.1 Prescription: 25% Removal

VCU

Number:

583,

 584

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

873

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit has varying stand structure with predominantly old-growth characteristics. The overstory 

consists primarily of western hemlock and Sitka spruce with areas of western redcedar and Alaska-cedar. Stem decay, butt 

rot, light mistletoe and some stem form issues are the main concerns. Overall average defect rating is high with moderate 

patches. Trees are over-mature to mature with static to declining growth. Windthrow risk is high. All adjacent past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings. 

A Tongass Wide Young Growth Study site (POW Little Ratz Experiment #4) is along the the southeastern boundary. 

Protection of this site is required. Contact the Forestry Sciences Lab in Juneau for additional information. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 75 

percent retention was selected because of high windthrow risk. Individual trees selected for harvest may occur in small 

groups but will generally be evenly distributed across the stand. Any small groups will usually be less than one acre but may 

occasionally go up to two acres in size where needed to address insect and disease issues or capitalize on existing 

advanced regeneration of desirable tree species. Trees selected for harvest will generally be well distributed and no large 

openings will occur as a result of the harvest. Review the marking guides and silvicultural prescription for more detailed 

information and direction regarding how to implement this prescription.

This is a legacy VCU. However, no Legacy acres required for uneven-aged management because adequate structure 

retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS roads 3000300 & 3023500.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. Streams 12.1R, A1.1L.2R, A1.1L.1R, A1.1L.1R.1R, A1.2L characteristics do not 

contain project specific field verified information.

Stream#: 54 Class: III , IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 53 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Unit

Number 161 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 161

Protection: Category B and C

Stream#: 51 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 50 Class: III, IV Flagging: O/W, G/W C- Type: HCL, HCO

Concerns: none

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 12.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B

Stream#: A1.1L.2R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.1L.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.1L.1R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to top of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category B 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

SIO is low. No concerns because of uneven-age management.

 RECREATION:

No Concerns

 SOILS/WETLANDS:
Unit 161 SOILS/WETLANDS:

Slopes range from 35 to greater than 100%. All slopes over 72% are within the soil exclusion area. About 8 acres were 

excluded due to colluvial activity on the soil surface, active and historic landslides, extremely steep and wet slopes, and 

MMI4 soils. Forested wetlands were identified throughout the unit but didn’t exceed 15% of the given area. In the remaining 

unit, full suspension is required to meet soil and wetland concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (along southern edge unit). Legacy standard and guideline applies in these VCUs. No Legacy acres required because 

adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

Alternative 4: Unit dropped to maintain habitat value and connectivity to the Clarence Strait shoreline in an area bordered on 

both sides by past harvest.
3000300

3023500

1

A2.2R

A1.2L

A1.1L.2R

A2.1R

54

51.1L

A1

1.10R.1L.1L

50.1L

52

1.11R

53

3.1R

51

3

51

A2

A1.1L.1R

A1.1L.1R.1R

1.10R.1L

A1.1L.1R

50

1.10 R

1959

1965

1999

1998

160

161

159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 161 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000300

3023500

50

1.10 R

1

A2.2R

A1.2L

A1.1L.2R

A2.1R

54

51.1L

A1

1.10R.1L.1L

50.1L

52

1.11R

53

3.1R

51

3

51

A2

A1.1L.1R

A1.1L.1R.1R

1.10R.1L

A1.1L.1R

1959

1965

1999

1998

160

161

549

550

159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 161 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000300

3023500

50

1.10 R

1

A2.2R

A1.2L

A1.1L.2R

A2.1R

54

51.1L

A1

1.10R.1L.1L

50.1L

52

1.11R

53

3.1R

51

3

51

A2

A1.1L.1R

A1.1L.1R.1R

1.10R.1L

A1.1L.1R

1959

1965

1999

1998

160

161

549

550

159

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 161 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 162

Total Unit

Acres:

21.2 Prescription: 2, 3, 5 - Clearcut

4 - 25% Removal

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 443

4 - 111 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 162 has predominantly old-growth characteristics. The overstory consists of western hemlock and 

Sitka spruce with areas of western redcedar and Alaska-cedar. Stem decay, butt rot and light mistletoe are the main 

concerns. Overall average defect rating is high to moderate. Trees are over-mature to mature with static to declining growth. 

Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for 

no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2,3,5)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of separate settings that are less than 20 

acres; therefore, no legacy set-aside is required.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 because 

windtrhrow risk is high and also to maintain intact diverse structure for wildlife needed at this time and place in the landscape 

to meet the objectives of this alternative. This system is not optimum for promoting timber production but is being prescribed 

primarily to mitigate the overall effects of the project on wildlife.

 TIMBER/LOGGING:

 This unit is planned for helicopter yarding to landings on existing NFS road 3023500. Unit borders the Thorne River 

Roadless Area on the south.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 162 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 162

Streams are tributaries to Ratz Creek. Stream A10 characteristics do not contain project specific field verified information.

Stream#: 2 Class: I, II, III Flagging: B/W, O/W C- Type: AFH, HCV, HCD 

Concerns: blowdown and active erosion

Buffer (RMA): Class I for AFH greater of 140 feet or active portion of alluvial fan. Class II for HCV greater of 100 feet or to 

the top of the side-slope break. Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category A and B 

Stream#: A10 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 22 Class: III Flagging: O/W C- Type: HCD

Concerns: active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but Unit borders the Thorne River Roadless Area on the south.

 SOILS/WETLANDS:

Slopes range from 35 to greater than 100%. All slopes over 72% are within the soil exclusion area. About 10 acres were 

excluded due to colluvial activity on the soil surface, active and historic landslides, extremely steep and wet slopes, and 

MMI4 soils. Two revegetated debris avalanches have been mapped near the center of the unit. Forested wetlands were 

identified throughout the unit but didn’t exceed 15% of the given area. In the remaining unit, full suspension is required to 

meet soil and wetland concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (western portion of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because all settings are less than 20 acres.

Alternative 4: Prescription is 25% basal area removal to maintain connectivity and other habitat values.
3023500

3023530

3023500

22

31

1

A10

A1.7L

2

2.4L

12

32

2.2L

1 2.3L

2.1L

11

2.5L.1R

22

11.1L

302-2

10

24

2.6L

2.5L

23

2.7L

2

1

1959

1995

1964

1995

159

162

162

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 162 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023500

3023530

3023500

1

22

31

1

A10

A1.7L

2

2.4L

12

32

2.2L

1 2.3L

2.1L

11

2.5L.1R

22

11.1L

302-2

10

24

2.6L

2.5L

23

2.7L

2

1959

1995

1964

1995

159

162

551

552

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 162 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023500

3023500

3023530

2

1

22

31

1

A10

A1.7L

2

2.4L

12

32

2.2L

1 2.3L

2.1L

11

2.5L.1R

22

11.1L

302-2

10

24

2.6L

2.5L

23

2.7L

1959

1995

1964

1995

159

162

162

551

552

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 162 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023500

3023530

3023500

2

1

22

31

1

A10

A1.7L

2

2.4L

12

32

2.2L

1 2.3L

2.1L

11

2.5L.1R

22

11.1L

302-2

10

24

2.6L

2.5L

23

2.7L

1959

1995

1964

1995

159

162

162

551

552

158

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 162 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 167

Total Unit

Acres:

14.0 Prescription: 2, 3 - Clearcut

5 - 25% Removal

VCU

Number:

583 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 421

5 - 105 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This area has old-growth stand structure with mature overstory timber consisting of a western hemlock 

and Alaska-cedar mixture. Western redcedar and Sitka spruce are present, but as secondary components. Overall the 

average defect rating for all plots is moderate. Windthrow risk is rated moderate due to elevation, topography (ridgeline 

stand) and higher risk tree characteristics. Trees are generally mature with static growth. All adjacent past harvest areas 

have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 5)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 5 specifically to 

maintain significant vegetative cover post-harvest in this watershed, even though this system is not optimum for promoting 

timber production.

No legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternative 3: This unit is planned for downhill cable yarding to landings on the two proposed temporary roads. 

Alternatives 2, 5: This unit is planned for helicopter yarding to landings on existing NFS road 3023500.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternative 3, totaling 600 feet, as displayed on the unit card. Existing 

NFS roads 3023500, 3023530, and 3023535, totaling 6,200 feet, will be reconstructed in Alternative 3 to provide access. 

These roads are also used to access Units 552, 555-558, 168, 169, and 177. See road card for detailed information. 

Existing NFS road 3023500 will be reconstructed in Alternatives 2 and 5, totaling 2,300 feet. This road is also used to access 

Units 552, 167, and 168. See road card for detailed information.

 BOTANY:

No Concerns

Unit

Number 167 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 167

 FISHERIES:

Streams are tributaries to Big Ratz Lake. 

Stream#: 2 C lass: II, III Flagging: B/W, O/W C- Type: HCL, HCD

Concerns: Active erosion, steep side-slopes and unstable soils.

Buffer (RMA): Class II for HCL and HCD greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top 

of the side-slope break. 

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes in this unit do not exceed 55%. Unit is dominant forested wetland. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

Alternative 3: Based on GIS analysis, a temporary road will impact about 1/4 acre of forested wetland and 1/4 acre of 

emergent sedge/forested wetland complex within the unit, and less than 1/4 acre of forested wetland and about 1/4 acre of 

emergent sedge/forested wetland complex outside the unit. Wetland avoidance was not feasible due to need for unit access, 

extent of wetlands in the area and engineering constraints (BMP 12.5, 13.2). Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4,5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit except along southern border). Legacy standard and guideline 

applies in this VCU, however there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped to maintain connectivity near Ratz Creek (Ratz Creek to Big Lake, and then down Big Creek to 

Ratz Harbor) and other habitat values.
3023535

3023500

3023530

1.2R

1.1R

1.3L

2

1.4R

a3

1

A1.10L.1R

2

A1.10L

2

1959

1963

1960

1963

1960

1995

167

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 167 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023535

3023500

3023530

3023535

1.2R

1.1R

1.3L

2

1.4R

a3

1

A1.10L.1R

2

A1.10L

2

1959

1963

1960

1963

1960

1995

167

168

169

552

555

556

557

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 167 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023535

3023500

3023530

1.2R

1.1R

1.3L

2

1.4R

a3

1

A1.10L.1R

2

A1.10L

2

1959

1963

1960

1963

1960

1995

167

168

169

552

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 167 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 168

Total Unit

Acres:

2, 3 - 42.8

4, 5 - 55.7

Prescription: 2, 3 - Clearcut

4, 5 - 25% 

Removal

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 1,001

4, 5 - 326 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This area has old-growth stand structure with mature overstory timber consisting of a western hemlock 

and Alaska-cedar mixture. Western redcedar and Sitka spruce are present, but as secondary components. The main 

concerns in the stand are moderate stem decay and stem form defects. The mistletoe rating was low. The windthrow rating 

was moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2,3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 19 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG and reduce the size of openings, dividing the original unit into two smaller openings. Helicopter yarding economics 

was also considered. Total mapped legacy is approximately 19 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternatives 4, 5)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife. The uneven-aged single tree selection regeneration method is being prescribed for 

this unit in Alternative 5 specifically to maintain significant vegetative cover post-harvest in this watershed, although this 

system is not optimum for promoting timber production but is being prescribed primarily to mitigate the overall effects of the 

project on watersheds and fish.

Existing Condition: This area has old-growth stand structure with mature overstory timber consisting of a western hemlock 

and Alaska-cedar mixture. Western redcedar and Sitka spruce are present, but as secondary components. Overall the 

average defect rating for all plots is moderate. Windthrow risk is rated moderate due to elevation, topography (ridgeline 

stand) and higher risk tree characteristics. Trees are generally mature with static growth. All adjacent past harvest areas 

have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

Unit

Number 168 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation
Unit 168

post harvest, promote natural regeneration by opening up the canopy, improve site productivity through increased soil 

temperature and minimize defect and disease in the future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 5)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 5 specifically to 

maintain significant vegetative cover post-harvest in this watershed, even though this system is not optimum for promoting 

timber production.

No legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to a landing on existing NFS road 3023500.

 ENGINEERING/ROADS:

Existing NFS road 3023500 will be reconstructed in all alternatives, totaling 2300 feet. This road is also used to access Units 

552, 167, and 168. See road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 2 Class: III Flagging: O/W C- Type: HCD, HCL

Concerns: active erosion and unstable soils

Buffer (RMA): Class III for HCD and HCL to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but unit borders the Thorne River Roadless Area on the west.

 SOILS/WETLANDS:

Slopes range from 15 to 70%. About 8 acres of the unit were excluded due to colluvial activity on the soil surface, historic 

landslides, steep slopes, and MMI4 soils. The unit is 40 to 60% forested wetlands. In the remaining unit, full suspension is 

required to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

 INVASIVE SPECIES:

No Concerns
Unit 168

Unit includes average snow deer winter range (entire unit except along eastern border). Legacy standard and guideline 

applies in this VCU. Positioning of legacy acres blocks up POG and reduces the size of openings, dividing the original unit 

into two smaller openings. It also covers some deer winter range.

Alternatives 4 and 5: Prescription is 25% basal area removal to maintain connectivity near Ratz Creek (Ratz Creek to Big 

Lake, and then down Big Creek to Ratz Harbor) and other habitat values. No Legacy acres required because adequate 

structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
3023535

3023500

1

1

1.8R

1.2R

1.5L

1.1R

1.3L

1

1.4 R

1.6 R

a3

1.7R

2

1963

1960

1995

167

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 168 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023535

3023500

3023535

1

1

1.8R

1.2R

1.5L

1.1R

1.3L

1

1.4 R

1.6 R

a3

1.7R

2

1963

1960

1995

167

168

169

555

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 168 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023535

3023500

1

1

1.8R

1.2R

1.5L

1.1R

1.3L

1

1.4 R

1.6 R

a3

1.7R

2

1963

1960

1995

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 168 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023535

3023500

1

1

1.8R

1.2R

1.5L

1.1R

1.3L

1

1.4 R

1.6 R

a3

1.7R

2

1963

1960

1995

167

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 168 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 169

Total Unit

Acres:

13.5 Prescription: 2, 3 - Clearcut

4, 5 - 25% 

Removal

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 262

4, 5 - 65 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 169 has old-growth stand structure with mature overstory timber consisting of a western hemlock and 

Alaska-cedar mixture. Western redcedar and Sitka spruce are present, but as secondary components. The main concerns in 

the stand are moderate stem decay and stem form defects. The mistletoe rating was low. The windthrow rating was 

moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer 

being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternatives 4, 5)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife. The uneven-aged single tree selection regeneration method is being prescribed for 

this unit in Alternative 5 specifically to maintain significant vegetative cover post-harvest in this watershed, although this 

system is not optimum for promoting timber production.

 TIMBER/LOGGING:

Alternatives 2, 4, 5: This unit is planned for helicopter yarding to a landing on existing NFS road 3023500. 

Alternative 3: This unit is planned for helicopter yarding to a landing on existing NFS road 3023535.

 ENGINEERING/ROADS:

Alternative 3: Existing NFS roads 3023500, 3023530, and 3023535, totaling 6200 feet, will be reconstructed to provide 

access. These roads are also used to access Units 552, 555-558, 168, 169, and 177. See road card for detailed information. 

Alternatives 2, 4, and 5: Existing NFS roads 3023530, and 3023500 will be reconstructed, totaling 2300 feet. This road is also 

used to access Units 552, 167, and 168. See road card for detailed information.

 BOTANY:

No Concerns

Unit

Number 169 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:
Unit 169

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 2 Class: III Flagging: O/W C- Type: HCD, HCL

Concerns: Active erosion and unstable soils

Buffer (RMA): Class III for HCD and HCL to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns; however, note that the unit borders the Thorne River Roadless Area on the south.

 SOILS/WETLANDS:

Slopes range from 15 to 90%. About 2 1/2 acres of steep slopes are within the soil exclusion area. About 5 acres of the unit 

were excluded due to colluvial activity on the soil surface, historic landslides, steep slopes, and MMI4 soils. The unit is 40 to 

60% forested wetlands. A debris avalanche that is less than 1/4 acre in size is located within the soil exclusion. In the 

remaining unit, full suspension is required to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.

Alternatives 4 and 5: Prescription is 25% basal area removal and maintains connectivity near Ratz Creek.

 INVASIVE SPECIES:

No Concerns
3023500

3023535

1.2R

1.1R

1.7 R

1.6 R

2

1.4 R

a3

2

1963

1963

1960

167

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 169 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023500

3023535

3023535

1.2R

1.1R

1.7 R

1.6 R

2

1.4 R

a3

2

1963

1963

1960

167

168

169

555

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 169 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023500

3023535

1.2R

1.1R

1.7 R

1.6 R

2

1.4 R

a3

2

1963

1963

1960

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 169 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023500

3023535

1.2R

1.1R

1.7 R

1.6 R

2

1.4 R

a3

2

1963

1963

1960

167

168

169

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 169 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 171

Total Unit

Acres:

14.0 Prescription: 25% Removal

VCU

Number:

583,

 584

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

96

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. Overstory trees are primarily western hemlock and Sitka spruce 

with moderate defect. Mistletoe was rated as heavy but patchy. Windthrow risk is high. There are no adjacent past harvest 

areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

 TIMBER/LOGGING:

Alternatives 3, 4, and 5: This unit is planned for helicopter yarding to landings on existing NFS road 302351. 

Alternative 2: This unit is planned for helicopter yarding to landings on existing NFS road 3000300.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

No streams found in unit at time of survey. If streams are found during implementations, a fish biologist would be notified 

and appropriate protections would be applied.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Unit

Number 171 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 171 SOILS/WETLANDS:

Slopes range from 30 to 75%. There are about 1⁄2 acre of slopes over 72% that are suitable for harvest with full suspension 

Forested wetlands were identified throughout the units but do not exceed 15% of the given area. Full suspension is required 

to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern 1/2 of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.
3023510

3023500

3000300

3000000

1

1.1R

A2.2R

A2.1R

A3

1967

1959

1966

1967

1965

161

171

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 171 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023510 3023500

3000300

3000000

3023510

1

1.1R

A2.2R

A2.1R

A3

1967

1959

1966

1967

1965

161

171

549

550

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 171 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023510 3023500

3000300

3000000

3023510

1

1.1R

A2.2R

A2.1R

A3

1967

1959

1966

1967

1965

171

549

550

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 171 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023510

3023500

3000300

3000000

1

1.1R

A2.2R

A2.1R

A3

1967

1959

1966

1967

1965

161

171

549

550

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 171 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583,584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 172

Total Unit

Acres:

46.3 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,269

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of small diameter western 

hemlock under western redcedar dominants. Scattered Sitka spruce and Alaska-cedar are also in the overstory but less 

common. The main damages and defects are stem form defects and mistletoe. Mistletoe is reported as moderate rating. 

The windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 22 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, reduce road length, and reduce visibility of unit from NFS road 3000000 and the Clarence Strait. Total mapped 

legacy is approximately 24 acres. Any adjustments to the planned unit during implementation must consider the planned 

acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3; This unit is planned for a combination of cable, and shovel yarding. Cable settings are planned for uphill 

and downhill yarding to landings on the proposed temporary road and proposed NFS road 3000301. Shovel settings are 

planned for yarding to the proposed temporary road and proposed NFS road 3000301. 

Alternative 5; This unit is planned for helicopter yarding. Helicopter yarding is planned to landings on existing NFS roads 

3000302 and 3023500.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000307 in Alternatives 2 and 3, totaling 2,200 feet. See road card for detailed 

information. Unit is also accessed by a proposed temporary road in Alternatives 2 and 3, totaling 1,100 feet, as displayed on 

the unit card. Unit is also accessed by reconstructed NFS road 3000301, totaling 2,900 feet. This road is also used to access 

Unit 559. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 172 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 172

 FISHERIES:

Streams are tributaries to Ratz Harbor.

Stream#: 1.6L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category A and C 

Stream#: 1 Class: II, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: blowdown

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category A and C

All other stream in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 172: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance. The 

physical boundaries of this unit are not to be modified without input from a Forest Service Heritage specialist.

 SCENERY:

SIO for this unit is mostly Low, with 5 acres of Very Low. Because of distance and partial screening from the 30 Road, the 

relatively gentle topography, and legacy, there are no scenery concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes average 10 to 85%. Forested wetlands are found along the eastern three quarters of the unit and occur intermittently 

along the proposed roadline. Less than 2 acres of slopes greater than 72% occur in the southwest corner of the unit. Full 

suspension is required on these slopes, which range from 70 to 85%. All slopes greater than 72% are located within the full 

suspension area. In the remainder of the unit, the soils and wetlands are suitable for a minimum partial suspension yarding 

or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid 

the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding 

under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track 

slippage and rutting.

Alternatives 2 & 3

A proposed temporary road will impact about 1 acre of forested wetland within the unit. Wetland avoidance was not 

practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the 

road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; positioning of 

Legacy acres covers some deer winter range.

Alternative 4: Unit dropped because location coincides with biologically preferred small OGR.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 3, and 5: Current OGR boundary adjacent to unit to the north. 
Unit 172

Alternative 4: OGR boundary moved to the south, coinciding with unit location.

Total Unit

Acres:

Prescription:

VCU

Number:

Harvest

System:

Net Harvest

Volume

(MBF):

LUD:

 SILVICULTURE:

DROPPED

 TIMBER/LOGGING:

 ENGINEERING/ROADS:

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. (Location is depicted from confluence to headwaters)

Stream#: 583-173-1.9R Location: E3, E4, E5, E6

Class: III Flagging: O/W C- Type: HCM, MMO

Concerns: none

Buffer (RMA): Class II for HCM greater of 100 feet or the side-slope break. Class II for MMO greater 120 feet, flood plain, 

riparian vegetation or soils, or riparian associated wetland fens.

Buffer (RAW): none

Mitigation/Protection: Category B (See below) 

All other stream in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none

Buffer (RAW): none

Mitigation/Protection: Category C (See below)

 GEOLOGY/KARST:

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

 RECREATION:

 SOILS/WETLANDS:

 WILDLIFE:

Unit

Number 173 Alternatives DROPPED

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
3000302

3023500

3000000

3000301

A1.1L.1R

A1

1

A1.1L

A1.1L.2R

1.9R

A1.1L.1R

A1.2L

A1.1L.1R

1.1L

1.5R

1.6L

A 1

1.2R

1.10R

1

1.6L

1.4L

1.6L.1R

1.3 L

1

2

1960

1959

1963

1960

2006

1995

1960

1995

172

161

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 172 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000302

3000000

3023500

3000301

1.3 L

1

2

A1.1L.1R

A1

1

A1.1L

A1.1L.2R

1.9R

A1.1L.1R

A1.2L

A1.1L.1R

1.1L

1.5R

1.6L

A 1

1.2R

1.10R

1

1.6L

1.4L

1.6L.1R

1960

1959

1963

1960

2006

1995

1960

1995

172

550

559

562

161

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 172 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000302

3023500

3000301

3000000

1.6L.1R

1.3 L

1

2

A1.1L.1R

A1

1

A1.1L

A1.1L.2R

1.9R

A1.1L.1R

A1.2L

A1.1L.1R

1.1L

1.5R

1.6L

A 1

1.2R

1.10R

1

1.6L

1.4L

1960

1959

1963

1960

1995

2006

1995

1960

172

550

559

562

161

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 172 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 174

Total Unit

Acres:

23.5 Prescription: 2, 3, 5 - 50% 

Removal

4 - 25% Removal

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 288

4 - 144 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 174 has old-growth stand structure with over-mature timber. The overstory consists primarily of 

western hemlock along with a fairly equal mix of Alaska-cedar and Sitka spruce. Many dead western hemlock are also 

present throughout the unit. Western redcedar occurs only in isolated patches. Physical defects and stem decay were rated 

high. Mistletoe and windthrow risk are moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, 

meeting NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 50 percent in Alternatives 2, 3, and 5, and 75 percent in Alternative 4 of the setting pretreatment basal area, 

based on standing live tree total for the unit, uncut. Individual trees selected for harvest may occur in small groups but will 

generally be evenly distributed across the stand. Any small groups will usually be less than one acre but may occasionally go 

up to two acres in size where needed to address insect and disease issues or capitalize on existing advanced regeneration 

of desirable tree species. Trees selected for harvest will generally be well distributed and no large openings will occur as a 

result of the harvest. Review the marking guides and silvicultural prescription for more detailed information and direction 

regarding how to implement this prescription.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3000306.

 ENGINEERING/ROADS:

Unit is accessed by reconstructed NFS road 3000306, totaling 1,700 feet. This road is also used to access Units 563 and 

175. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Harbor.

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No concerns because of uneven-aged management and distance from NFS Road 3000000.

 RECREATION:

Unit

Number 174 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 174

No concerns; however, note that the unit borders the Thorne River Roadless Area.

 SOILS/WETLANDS:

Slopes range from 10 to 110%. There are intermittent forested wetland areas on the western side of the unit on slopes less 

than 35%.There is a small cliff with slopes greater than 72% near the center of the unit. There is also a well drained cliff band 

with slopes ranging from 70 to 90% along the northern boundary of the unit. Both of these cliff areas are suitable for harvest 

with full suspension. Full suspension is required to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern and southern ends unit). Legacy standard and guideline applies in this VCU. No Legacy acres required 

because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

Alternative 4: Prescription is 25% basal area removal to maintain connectivity to Ratz Harbor (unit is bordered mostly by past 

harvest) and other habitat values.
3000306

3023520

3023525

3000306

4.1R

1.3R.1R

A6

1

1.1L

1.3R

1

4

1

1.2L

1

1.1R

2

1

A1

3

A1

1965

1995

1963 1960

1960

1960

174

174

175

175

175

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 174 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000306

3023520

3023525

3000306

4.1R

1.3R.1R

A6

1

1.1L

1.3R

1

4

1

1.2L

1

1.1R

2

1

A1

3

A1

1965

1995

1963 1960

1960

1960

174

175

563

564

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 174 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023525

3023520

3000306

3000306

1

1.2L

1

1.1R

2

1

A1

3

A1

4.1R

1.3R.1R

A6

1

1.1L

1.3R

1

4

1965

1995

1963 1960

1960

1960

174

175

175

175

563

564

174

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 174 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023525

3023520

3000306

3000306

1

1.2L

1

1.1R

2

1

A1

3

A1

4.1R

1.3R.1R

A6

1

1.1L

1.3R

1

4

1965

1995

1963 1960

1960

1960

174

175

175

175

563

564

174

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 174 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 175

Total Unit

Acres:

6.4 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

175

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with over-mature timber. The overstory consists primarily of 

western hemlock along with Alaska-cedar and Sitka spruce. Many dead western hemlock are also present throughout the 

unit. Western redcedar occurs in isolated patches. Physical defects and stem decay were rated high. Mistletoe is moderate 

and windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3000306. The two polygons of the unit are on 

opposite sides of and border a finger of the Thorne River inventoried roadless area.

 ENGINEERING/ROADS:

Unit is accessed by reconstructed NFS road 3000306, totaling 1,700 feet. This road is also used to access Units 563 and 

174. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Harbor.

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit

Number 175 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 175

No concerns, but note that the two polygons of the unit are on opposite sides of and border a finger of the Thorne River 

inventoried roadless area.

 SOILS/WETLANDS:

In the northern portion of the unit, slopes range from 10 to 30%. In the southern portion of the unit, slopes range from 35 to 

65%. Forested wetlands occupy approximately 40% of the unit. About 18 acres were excluded due to colluvial activity on the 

soil surface, active and historic landslides, and steep wet slopes. A partially revegetated debris avalanche that is less than 

1/4 acre in size is located within the soil exclusion area. A 4 acres debris avalanche is also mapped between the proposed 

harvest areas. In the remainder of the unit, a minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 

acres.
3023520

3023525

3000306

3023525

3000306

1

1.1R

2

1

3

A1

A1

4.1R

1.3R.1R

4

1

1.1L

1.3R

1

4

1.2L

1

1965

1963

1960

1995

174

175

175

175

177

178

174

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 175 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000306

3023525

3023525

3023520

3000306

4.1R

1.3R.1R

4

1

1.1L

1.3R

1

4

1.2L

1

1

1.1R

2

1

3

A1

A1

1965

1995

1963

1960

174

175

177

178

563

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 175 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023520

3023525

3023525

3000306

3000306

1

1

1.1R

2

1

3

A1

A1

4.1R

1.3R.1R

4

1

1.1L

1.3R

1

4

1.2L

1965

1963

1960

1995

174

175

175

175

177

178

563

174

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 175 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023520

3023525

3023525

3000306

3000306

1

1

1.1R

2

1

3

A1

A1

4.1R

1.3R.1R

4

1

1.1L

1.3R

1

4

1.2L

1965

1963

1960

1995

174

175

175

175

177

178

563

174

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 175 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 177

Total Unit

Acres:

58.6 Prescription: 2, 3, 4 - 50% 

Removal

5 - 25% Removal

VCU

Number:

583

0

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 4 - 781

5 - 391 LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: Unit 177 has old-growth stand structure. Overstory is western hemlock, Sitka spruce and Alaska-cedar 

with some scattered western redcedar. The stand is high defect due to heavy stem decay and poor stem form. Mistletoe is 

light and windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings. 

A Tongass Wide Young Growth Study site (POW Ratz Experiment #4) is to the southeast of this unit. Protection of this site is 

required. Contact the Forest Science Lab in Juneau for additional information. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 50 percent in Alternatives 2, 3, and 4, and 75 percent in Alternative 5 (due to watershed concerns) of the 

setting pretreatment basal area, based on standing live tree total for the unit, uncut. Individual trees selected for harvest may 

occur in small groups but will generally be evenly distributed across the stand. Any small groups will usually be less than one 

acre but may occasionally go up to two acres in size where needed to address insect and disease issues or capitalize on 

existing advanced regeneration of desirable tree species. Trees selected for harvest will generally be well distributed and no 

large openings will occur as a result of the harvest. Review the marking guides and silvicultural prescription for more detailed 

information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternative 2, 5: This unit is planned for helicopter yarding to landings on the existing NFS road 3023500

Alternatives 3, 4: This unit is planned for helicopter yarding to landings on the proposed temporary road in Unit 557.

 ENGINEERING/ROADS:

This unit utilizes the proposed temporary road constructed into Unit 557 in Alternatives 3 and 4, totaling 2,800 feet, as 

displayed on the unit card for Unit 557. This entire road will be constructed across decommissioned road bed. 

Unit is accessed by reconstructed existing NFS road 3023500 in Alternatives 2 and 5, totaling 2,300 feet. This road is also 

utilized by Units 167-169, and 552. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 177 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 177

Streams are tributaries to Ratz Creek. Stream 1, A1, 5 characteristics do not contain project specific field verified information.

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none known

Buffer (RMA): Class III for HCM to the top of side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B and C 

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown, active erosion, mobile particles and bedrock side-slopes

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed. 

Protection: Category B and C

Stream#: 3 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown, active erosion, mobile particles and bedrock side-slopes

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed. 

Protection: Category B and C

Stream#: 3.1R Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown, active erosion, mobile particles and bedrock side-slopes

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed. 

Protection: Category B and C 

Stream#: 3.3R Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown, active erosion, mobile particles and bedrock side-slopes

Buffer (RMA): Class III for HCD to the top of the side-slope break, Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B and C 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B

Stream#: 5 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but unit borders the Thorne River roadless area on its northern border.

 SOILS/WETLANDS:
Unit 177 SOILS/WETLANDS:

Slopes in this unit range from 30 to greater than 90%. The majority of the slopes average 55 to 70%. There is a small area in 

the middle of the unit that contains forested wetlands. An alder vegetated debris avalanche initiated near the southwester 

boundary and continues out of the unit. There are about 4 acres of slopes greater than 72% in the southwest corner of the 

unit that are suitable for harvest with full suspension. About 9 acres were excluded due to very high landslide potential, 

colluvial activity, MMI4 soils, steep slopes, and unstable drainages. In the remainder of the unit, full suspension is required to 

meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU. No Legacy 

acres required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger 

than 20 acres).
3023530

3 3. R

2

3 1. R.1L 3.2R

4

A2

3

5

3.1 R

2

1

A1.13L

A1.10L.1R.1R

A1.12L

1963

1995

177

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 177 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3023530

3023530

3 3. R

2

3 1. R.1L 3.2R

4

A2

3

5

3.1 R

2

1

A1.13L

A1.10L.1R.1R

A1.12L

1963

1995

177

557

558

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 177 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3023530

3023530

3 3. R

2

3 1. R.1L 3.2R

4

A2

3

5

3.1 R

2

1

A1.13L

A1.10L.1R.1R

A1.12L

1963

1995

177

557

558

558

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 177 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3023530

3 3. R

2

3 1. R.1L 3.2R

4

A2

3

5

3.1 R

2

1

A1.13L

A1.10L.1R.1R

A1.12L

1963

1995

177

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 177 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 178

Total Unit

Acres:

8.6 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

128

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with a western hemlock overstory. Sitka spruce, western 

redcedar and Alaska-cedar are intermixed in the overstory. The dominant damage agents are heart rot, stem decay and 

patches of stem deformity (pistol butts). Alaska-cedar are generally poor quality and over-mature with high defect. Mistletoe 

is light and windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for uphill and downhill cable yarding to landings on the proposed temporary road. 

Alternative 4: This unit is planned for helicopter yarding to landings on the existing NFS road 3000000.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2, 3, and 4, totaling 1,600 feet, as displayed on the unit card. 

Approximately 1,200 feet of this road will be constructed across decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 2 Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: Blowdown and active erosion

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: 2.1R Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: Blowdown and active erosion

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category A and B 

Unit

Number 178 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 178

Stream#: 1 Class: III Flagging: O/W C- Type: HCD

Concerns: Blowdown 

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B

All other streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

Temporary roads (new and reopened decommissioned) for Unit 178: Alternatives 2, 3, and 4 -- One Class III stream 

crossing. The new temporary road will reopen a decommissioned road. The temporary roads have not been field verified 

and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation 

with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but unit abuts the Thorne River inventoried roadless area on the south.

 SOILS/WETLANDS:

Slopes range from 30 to 65%. A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 

13.5, and 13.9).

Alternatives 2, 3, and 4: A temporary road will impact about 1/4 acre of emergent sedge/forested wetland complex within the 

unit and 1/4 acre outside the unit. Wetland avoidance was not practicable due to the extent of wetlands in the area, 

engineering constraints and risk to downstream resources. (BMP 12.5, 13.2). Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern 1/2 of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.
3026000

3000000

2.1R.1L

4

4.1R

2.2L

TRIB

1.2 R

1.1R

1.3R

2

2

2.1R

1

A1

A7

1965

1990

1965

1989

1995

175

178

179

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 178 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3000000

2.1R.1L

4

4.1R

2.2L

TRIB

1.2 R

1.1R

1.3R

2

2

2.1R

1

A1

A7

1965

1990

1965

1989

1995

175

178

179

564

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 178 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026000

3000000

2.1R.1L

4

4.1R

2.2L

TRIB

1.2 R

1.1R

1.3R

2

2

2.1R

1

A1

A7

1965

1990

1965

1989

1995

175

178

179

564

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 178 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026000

3000000

2.1R.1L

4

4.1R

2.2L

TRIB

1.2 R

1.1R

1.3R

2

2

2.1R

1

A1

A7

1965

1990

1965

1989

1995

175

178

179

564

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 178 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 179

Total Unit

Acres:

6.1 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

190

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: Unit 179 has old-growth stand structure with a western hemlock overstory with Sitka spruce, western 

redcedar and Alaska-cedar intermixed. The dominant damage agents are heart rot, stem decay and patches of stem 

deformity (pistol butts). Alaska-cedar is generally poor quality and over-mature with high defect. Mistletoe is light and 

windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for helicopter yarding to landings on the proposed temporary road accessing Unit 

178.

Alternative 5: This unit is planned for helicopter yarding to landings on existing NFS road 3000000.

 ENGINEERING/ROADS:

This unit is utilizing the proposed temporary road accessing Unit 178 in Alternatives 2, 3, and 4, totaling 1,600 feet. 

Approximately 1,200 feet of this road will be constructed across decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. Stream 1.3 characteristics do not contain project specific field verified information.

Stream#: 1 Class: III Flagging: O/W C- Type: HCD

Concerns: none 

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B 

Stream#: 1.3 Class: III Flagging: O/W C- Type: HCM

Concerns: none 

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Unit

Number 179 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 179

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but unit abuts the Thorne River inventoried roadless area on the south.

 SOILS/WETLANDS:

Slopes range from 50 to 105%. There are intermittent forested wetland areas located within the unit. Most slopes greater 

than 72% are located within the unsuitable soil exclusion area, except for the northern corner of unit, which is also over 72% 

and should be excluded from harvest as well. About 6 acres were excluded due to colluvial activity on the soil surface, active 

and historic landslides, extremely steep slopes, and MMI4 soils. In the remainder of the unit, a minimum of partial suspension 

would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.
3026000

3000000

2.1R.1L

2.2L

1

TRIB

1.2 R

1.1R

2.1L

1.3R

2

2

2.1R

2

1

1965

1989

1989 1965

1995

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 179 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3000000

2.1R.1L

2.2L

1

TRIB

1.2 R

1.1R

2.1L

1.3R

2

2

2.1R

2

1

1965

1989

1989 1965

1995

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 179 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026000

3000000

2.1R.1L

2.2L

1

TRIB

1.2 R

1.1R

2.1L

1.3R

2

2

2.1R

2

1

1965

1989

1989 1965

1995

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 179 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026000

3000000

2.1R.1L

2.2L

1

TRIB

1.2 R

1.1R

2.1L

1.3R

2

2

2.1R

2

1

1965

1989

1989 1965

1995

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 179 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 180

Total Unit

Acres:

5.9 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

120

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: Unit 180 has old-growth stand structure with western hemlock, Sitka spruce, western redcedar and 

Alaska-cedar common in the overstory. The dominant defects are stem decay and stem deformity (pistol butts). Lower bole 

damage is common. Mistletoe is light and windthrow risk is moderate. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is partially within the moderate SIO foreground area; however, this area only covers approximately 1 acre and is 

therefore not a concern. The rest of the unit has a low SIO. This stand is being recommended for harvest at this time 

because it is not expected to obtain the desired condition given the current growth trajectory. This stand is mature with 

moderate levels of decay and defect resulting in a situation where stand growth is being offset by decay. Even-aged clear 

cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, promote natural regeneration by 

opening up the canopy, and minimize defect and disease in the future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill cable yarding to landings on the existing NFS road 3000000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 1 Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Stream#: 2 Class: II, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated with 

wetland fens. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Stream#: 2.1L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break, Class IV for HCO none

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Unit

Number 180 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 180

Protection: Category A and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is only 6 acres in size, but does occur along NFS Road 3000000. It consists mostly of Low SIO but includes 1 acre of 

Moderate SIO as well. Views are partially screened by riparian buffers which overlap road. Moderate SIO with Intermediate 

VAC have a typical opening size allowed by the Forest Plan of 15 to 40 acres. No concerns.

 RECREATION:

No Concerns; however, yarding activities will need to coordinate with recreational and other use of the mainline NFS Road 

3000000.

 SOILS/WETLANDS:

Slopes range from 50 to 85%. No wetlands have been mapped in the unit. All slopes greater than 72% are located within the 

soil exclusion area. About 14 acres were excluded due to colluvial activity on the soil surface, active and historic landslides, 

extremely steep slopes, and MMI4 soils. In the remainder of the unit a minimum of partial suspension would meet soil and 

wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 

acres.
3026000

3000000

1.3R

1.5R

14R. 1R

1

1.2 R

1.1R

2.1L

A1

1.3R

1.4R

LAKE A1

2

1

1990

1991

1991

1989

1989

1989

178

179

180

181

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 180 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3000000

1.3R

1.5R

14R. 1R

1

1.2 R

1.1R

2.1L

A1

1.3R

1.4R

LAKE A1

2

1

1990

1991

1991

1989

1989

1989

178

179

180

181

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 180 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026000

3000000

1.3R

1.5R

14R. 1R

1

1.2 R

1.1R

2.1L

A1

1.3R

1.4R

LAKE A1

2

1

1990

1991

1991

1989

1989

1989

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 180 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026000

3000000

1.3R

1.5R

14R. 1R

1

1.2 R

1.1R

2.1L

A1

1.3R

1.4R

LAKE A1

2

1

1990

1991

1991

1989

1989

1989

178

179

180

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 180 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 181

Total Unit

Acres:

5.8 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

155

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 181 has old-growth stand structure with significant recent windthrow. The overstory consists of 

western hemlock, Sitka spruce and Alaska-cedar. Distribution is patchy due to windthrow. The dominant defect agent is 

weather related breakage. Light mistletoe infection is throughout. There are standing Sitka spruce and salvable Alaskacedar in the unit that would carry logging costs. Windthrow risk is high. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3026000.

 ENGINEERING/ROADS:

Np proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Little Lake. Stream A1 characteristics do not contain project specific field verified information.

Stream#: 1.3R Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Stream#: 1.5R Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Unit

Number 181 Alternatives 2, 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 181

Stream#: Lake-A1 (Little Lake) Class: 1 Flagging: B/W C- Type: L

Concerns: none known.

Buffer (RMA): Class I for Lake-1 greater of 100 horizontal feet or to the extent of the flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or one site-potential tree height. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit contains 6 acres of Low SIO. Even with Low VAC, typical unit openings allowed by the Forest Plan are 15 to 40 acres. 

No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 40 to 100%. All slopes exceeding 72% are located within the soil exclusion area. About 43 acres were 

excluded due to colluvial activity on the soil surface, active and historic landslides, extremely steep slopes, and MMI4 soils. 

Wetlands were not observed during field review. In the remainder of the unit, a minimum of partial suspension would meet 

soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (southern 1/2 of unit). Eagles and loons observed at Little Lake. Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped to minimize impacts to marten habitat and deer winter range.
3026000

3000000

3026000

3026000

1

2

3

2

1 3. R

1.5R

14R.1R

1.4R

LAKE A1

4

A1

1990

1992

1990

1991

1991

1989

1989

1990

180

181

182

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 181 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3000000

3026000

3026000

1

2

3

2

1 3. R

1.5R

14R.1R

1.4R

LAKE A1

4

A1

1990

1992

1990

1991

1991

1989

1989

1990

180

181

182

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 181 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 182

Total Unit

Acres:

24.9 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

514

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 182 has old-growth stand structure comprised of western hemlock, Sitka spruce and Alaska-cedar. 

The dominant defect is stem decay with an overall average defect rating of moderate. Windthrow risk is high. The unit rated 

low for mistletoe. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 11 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to 

reduce road requirements and block up POG above stream on NW side of unit. Total mapped legacy is approximately 11 

acres. Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, and cable yarding. Cable settings are planned for uphill and downhill yarding 

to landings on the proposed temporary roads and the existing NFS road 3026000. Shovel settings are planned for yarding to 

the south proposed temporary road and existing NFS road 3026000.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads, totaling 2,500 feet, as displayed on the unit card. Approximately 1,500 

feet of this road will be constructed across decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek.

Stream#: 1.1L Class: II, III Flagging: B/W, O/W C- Type: MMS, HCM

Concerns: none known

Buffer (RMA): Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 182: All Alternatives -- One Class IV stream crossing. The new temporary road stream crossing 

Unit

Number 182 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 182

would be on a new temporary road that is an extension of an existing decommissioned road that would be reopened. The 

temporary roads have not been field verified and will be surveyed before implementation. Crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 55 to 100%. Wetlands were not observed during field review. The soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Shovel 

yarding should only occur on the more gentle slopes on the lower portion of the unit. Slopes over 25% gradient may not be 

suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1/4 acre of emergent short sedge/forested wetland complex and about 1/4 acre of 

forested wetland. Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross 

drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (northern and southern ends of unit). Legacy standard and guideline applies in 

this VCU; positioning of Legacy acres protects some deer winter range.
3026000

3026000

3026000

.5R

14R.1R1.3R

3

2

1.1L. 2L

1.4R

1.2R.2R

1.1L .1L

1

1.2R.1R

.2R

1

4

A1

1.1L

1989

1990

1992

1990

1991

1990

181

182

183

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 182 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3026000

3026000

.5R

14R.1R1.3R

3

2

1.1L. 2L

1.4R

1.2R.2R

1.1L .1L

1

1.2R.1R

.2R

1

4

A1

1.1L

1989

1990

1992

1990

1991

1990

181

182

183

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 182 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026000

3026000

3026000

.5R

14R.1R1.3R

3

2

1.1L. 2L

1.4R

1.2R.2R

1.1L .1L

1

1.2R.1R

.2R

1

4

A1

1.1L

1989

1990

1992

1990

1991

1990

182

183

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 182 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026000

3026000

3026000

.5R

14R.1R1.3R

3

2

1.1L. 2L

1.4R

1.2R.2R

1.1L .1L

1

1.2R.1R

.2R

1

4

A1

1.1L

1989

1990

1992

1990

1991

1990

182

183

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 182 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 183

Total Unit

Acres:

26.1 Prescription: 2, 3, 5 - Clearcut

4 - 25% and 

33% Removal

VCU

Number:

583 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 569

4 - 155 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with overstory species composition consisting of a mix between 

western hemlock, Alaska-cedar and mountain hemlock. The dominant defects are stem decay and weather breakage. The 

overall average defect rating is high. In general there are mixed values in over-mature timber of overall low quality. Mistletoe 

is light. Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3, 5)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of polygons that are less than 20 acres; 

therefore no legacy set-aside is required.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4 Helicopter Settings)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife. 

Silvicultural Prescription: Uneven-age Management Group Selection (Alternative 4 Shovel Settings)

Harvest up to 33% of the planned setting acreage in groups of trees up to two acres in size. Group selections should be well 

distributed across the stand. Locate groups to address insect and disease issues or capitalize on existing advanced 

regeneration of desirable tree species where possible. Locate group selections to maintain wildlife travel ways and important 

habitat while maximizing the economics of this entry and also maintaining the feasibility of future harvest entries in the 

remaining old growth portions of the unit. The uneven-aged group selection regeneration method is being prescribed for the 

unit or portions of the unit as a means to maintain large amounts of diverse structure to benefit wildlife in perpetuity.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding to the existing 

NFS road 3026000. The helicopter yarding is planned to landings on the existing NFS road 3026000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

Unit

Number 183 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:
Unit 183

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 1.3R Class: III Flagging: O/W C- Type: HCV

Concerns: blowdown, active erosion, very steep side-lopes, very shallow soils, and exposed bedrock. 

Buffer (RMA): Class III for HCV to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category B 

Stream#: 1.2R Class: II, III Flagging: B/W, O/W C- Type: HCL

Concerns: blowdown and active erosion 

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL to the top of the 

side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed .

Protection: Category A and B

Stream#: 1.2R.1R Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown, active erosion, very steep side-lopes, very shallow soils, and exposed bedrock. 

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1.2R.2R Class: III Flagging: O/W, G/W C- Type: HCL, AFH, HCD

Concerns: blowdown, active erosion, very steep side-lopes, very shallow soils, and exposed bedrock. 

Buffer (RMA): Class III for HCL and HCD to the top of the side-slope break. Class III for AFH greater of 140 feet or active 

portion of the alluvial fan.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be determined by IDT during layout.

Protection: Category B 

Stream#: 1.1R Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM, AFH, HCD

Concerns: blowdown and active erosion 

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL, HCM, and HCD to 

the top of the side-slope break. Class III for AFH greater of 140 feet or active portion of the alluvial fan.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Buffer (RAW): no review needed 

Protection: Category A and B 

Stream#: 1.3R Class: III Flagging: O/W C- Type: HCV

Concerns: blowdown and active erosion 

Buffer (RMA): Class III for HCV to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Buffer (RAW): no review needed 

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Th northern portions of the unit are within about 150 ft of the Ratz inventoried roadless area.

 SOILS/WETLANDS:

 INVASIVE SPECIES:

No Concerns
Unit 183 SOILS/WETLANDS:

Slopes range from 25% to greater than 120%. Wetlands were not noted during field review. Most of the slopes greater than 

72% are located within the soil exclusion areas. Approximately 24 acres were excluded due to very high landslide potential, 

colluvial activity, MMI4 soils, steep slopes, and unstable drainages. Approximately 5 acres of steep slopes located on the 

southern half of the western polygon of the unit are suitable for harvest with full suspension requirements. The full 

suspension area includes two small, revegetated debris avalanches that total less than 1/4 acre in size. In the remainder of 

the unit, soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems 

should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel yarding under some soil 

moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (northern 1/2 of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because all settings are less than 20 acres.

Alternative 4: Ground-based yarding of group selection with 33% basal area removal and helicopter yarding with 25% basal 

area removal to maintain connectivity and deer winter range.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, and 5: Current OGR boundary not adjacent to unit.

Alternative 3: OGR acres added along northern boundary of VCU to the north of unit.
3026000

3026100

1.1L. 2L

1 4. R

1.5R

1 2. R.2R 2. R

1.2R.1L.1L

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1L

1.1R

1.1R.1L

1.2R.2 R

1.3R

1.2R.2R.1R

1.1R

1

1.2R.2R

1.2R

1.1L

1.2R

1989

1989

1990

183

184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 183 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026000

3026100

1.1L. 2L

1 4. R

1.5R

1 2. R.2R 2. R

1.2R.1L.1L

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1L

1.1R

1.1R.1L

1.2R.2 R

1.3R

1.2R.2R.1R

1.1R

1

1.2R.2R

1.2R

1.1L

1.2R

1989

1989

1990

183

184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 183 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026000

3026100

1.1L. 2L

1 4. R

1.5R

1 2. R.2R 2. R

1.2R.1L.1L

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1L

1.1R

1.1R.1L

1.2R.2 R

1.3R

1.2R.2R.1R

1.1R

1

1.2R.2R

1.2R

1.1L

1.2R

1989

1989

1990

183

184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 183 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026000

3026100

1.1L. 2L

1 4. R

1.5R

1 2. R.2R 2. R

1.2R.1L.1L

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1L

1.1R

1.1R.1L

1.2R.2 R

1.3R

1.2R.2R.1R

1.1R

1

1.2R.2R

1.2R

1.1L

1.2R

1989

1989

1990

183

184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 183 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 184

Total Unit

Acres:

15.3 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

518

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with overstory species composition consisting of a mix between 

western hemlock, Alaska-cedar and mountain hemlock. The dominant defects are stem decay and weather breakage. The 

overall average defect rating is moderate. Mistletoe is light. Windthrow risk is high. All adjacent past harvest areas have 

regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the planned unit opening is less than 20 acres, therefore no 

legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for downhill cable yarding to landings on the existing NFS road 3026100.

 ENGINEERING/ROADS:

Unit is accessed by reconstructed existing NFS road 3026100, totaling 1800 feet.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 1.1R Class: III Flagging: O/W C- Type: HCM

Concerns: blowdown and active erosion 

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Buffer (RAW): no review needed 

Protection: Category B

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit

Number 184 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 184

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 25% to greater than 120%. No wetlands were noted during field observations. About 24 acres were 

excluded due to very high landslide potential, colluvial activity, MMI4 soils, steep slopes, and unstable drainages. All slopes 

over 72% are located in the soil exclusion area. In the remainder of the unit, the soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes 

over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving 

shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit except southern edge). Legacy standard and guideline applies in 

this VCU, however there are no requirements for this unit because it is less than 20 acres.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, and 5: Current OGR boundary not adjacent to unit. 

Alternative 3: OGR acres added along northern boundary of VCU to the north of unit.
3026100

3026000

3026100

1.2R 2. R.2R

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1R

1.1R.1L

1.2R.2 R

1.2R

2

1

1.2R.2R.1R

1.1R

1.2R.2R

1.2R

1989

1989

1993

1964

183 184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 184 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3026100

3026000

3026100

1.2R 2. R.2R

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1R

1.1R.1L

1.2R.2 R

1.2R

2

1

1.2R.2R.1R

1.1R

1.2R.2R

1.2R

1989

1989

1993

1964

183 184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 184 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3026100

3026000

3026100

1.2R 2. R.2R

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1R

1.1R.1L

1.2R.2 R

1.2R

2

1

1.2R.2R.1R

1.1R

1.2R.2R

1.2R

1989

1989

1993

1964

183 184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 184 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3026100

3026000

3026100

1.2R 2. R.2R

1.1R.1L.1L

1.2R.5L

1.2R.1R

1.1R

1.1R.1L

1.2R.2 R

1.2R

2

1

1.2R.2R.1R

1.1R

1.2R.2R

1.2R

1989

1989

1993

1964

183 184

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 184 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 185

Total Unit

Acres:

20.4 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

333

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock, mountain 

hemlock, Sitka spruce and western redcedar. The dominant defects are stem form and stem decay. Mistletoe is light. 

Windthrow risk is moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 9 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy is planned to 

coincide with areas that were dropped from the unit due to soils concerns. Total mapped legacy is approximately 10 acres. 

Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives: 2, 3, 4: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill 

yarding to landings on the proposed NFS road 3025550. Shovel settings are planned for yarding to the proposed NFS road 

3025550. 

Alternative 5: This unit is planned for helicopter yarding to landings on the existing NFS road 3025500.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3025550, totaling 2,300 feet, as displayed on the unit card. See road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Creek. 

Stream#: 1.1R Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO 

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

Unit

Number 185 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 185

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns, but the Ratz inventoried roadless area is within about 250 ft of the northwest border.

 SOILS/WETLANDS:

Slopes range from about 35 to greater than 72%. No wetlands were identified during field surveys. About 1/2 acre of slopes 

greater than 72% are suitable for harvest with partial suspension. About 8 acres were excluded due to steep slopes, MMI 4 

soils, and unstable drainages. The soils and wetlands are suitable for a minimum partial suspension yarding or shovel 

yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit except western edge). Legacy standard and guideline applies in 

this VCU; positioning of Legacy acres covers some deer winter range.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, and 5: Current OGR boundary near unit to the east. 

Alternative 3: OGR acres added along northern boundary of VCU to the north of unit.
3025000

3026100

3025500

3025500

3025550

1.2 L 1.3L

1.1L

1.2R

1

A1.1L

1

A2

.1R

1994

1994

1993

1964

2006 1994

184

185

186

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 185 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3025000

3026100

3025500

3025500

3025550

1.2 L 1.3L

1.1L

1.2R

1

A1.1L

1

A2

.1R

1994

1994

1993

1964

2006 1994

184

185

186

460

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 185 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3025000

3026100

3025500

3025500

3025550

1.2 L 1.3L

1.1L

1.2R

1

A1.1L

1

A2

.1R

1994

1994

1993

1964

2006 1994

184

185

186

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 185 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3025000

3026100

3025500

3025500

1.2 L 1.3L

1.1L

1.2R

1

A1.1L

1

A2

.1R

1994

1994

1993

1964

2006 1994

184

185

186

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 185 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 186

Total Unit

Acres:

7.5 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

175

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This old growth structured unit consists of western hemlock and scattered Sitka spruce with mountain 

hemlock and Alaska-cedar in the southwest. The average defect rating is light to moderate. Windthrow risk is high. All 

adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill cable yarding to landings on the existing NFS road 3025500. OGR adjacent to or 

near unit in all alternatives.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Ratz Harbor.

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

Unit

Number 186 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 186

 SOILS/WETLANDS:

Slopes range from about 17 to 40%. No wetlands were identified during field surveys. Partial suspension yarding would meet 

soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, and 5: Current OGR boundary adjacent to unit to south. 

Alternative 3: OGR acres added along northern boundary of VCU so OGR acres adjacent to unit to the north.
3025520

3025000

3025500

3025550

1.2L 1.3L

1.1L

1.2R

1

A1

1

A2

.1R

A1

A1.1L

A1.1R

1994

1994

1964

2006

1994

185

186

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 186 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3025520

3025000

3025500

3025550

1.2L 1.3L

1.1L

1.2R

1

A1

1

A2

.1R

A1

A1.1L

A1.1R

1994

1994

1964

2006

1994

185

186

460

461

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 186 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3025520

3025000

3025500

3025550

1.2L 1.3L

1.1L

1.2R

1

A1

1

A2

.1R

A1

A1.1L

A1.1R

1994

1994

1964

2006

1994

185

186

461 461

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 186 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3025520

3025000

3025500

1.2L 1.3L

1.1L

1.2R

1

A1

1

A2

.1R

A1

A1.1L

A1.1R

1994

1994

1964

2006

1994

185

186

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 186 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 187

Total Unit

Acres:

3.2 Prescription: Clearcut

VCU

Number:

581,

 583

Harvest

System:

Cable

Net Harvest

Volume

(MBF):

92

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with mature timber exhibiting static growth. The overstory 

consists of Alaska-cedar and western hemlock along with scattered Sitka spruce. The dominant damage is mainly crook and 

sweep. The overall defect rating for the entire unit is moderate. Smaller diameter Alaska-cedar dominate the entire unit. 

Mistletoe is light. Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in these VCU's; however, the planned unit is less than 20 acres, therefore no legacy 

set-aside is required.

 TIMBER/LOGGING:

This unit is planned for downhill cable yarding to landings on the proposed NFS road 3026500.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3026500, totaling 600 feet, as displayed on the unit card. See road card for detailed 

information.

 BOTANY:

No Concerns

 FISHERIES:

No streams found in unit at time of survey. If streams found during implementations a fish biologist would be notified and 

appropriate protections would be applied.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Unit

Number 187 Alternatives 2, 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 187 SOILS/WETLANDS:

Slopes range from about 40 to 100%. There is approximately 20% forested wetlands in the southeast corner of the unit. All 

slopes over 72% are in the soil exclusion area. Less than 1 acre was excluded due to high landslide potential, colluvial 

activity, and steep slopes. In the remainder of the unit, a minimum of partial suspension yarding would meet soil and wetland 

resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (southern 1/2 of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because it is less than 20 acres.
3000000

3026000

3026500

20

21

2

3

1

1971

1990

1971 1992

1972

187

189

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 187 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581,583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3026000

3026500

20

21

2

3

1

1971

1990

1971 1992

1972

187

189

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 187 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581,583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3026000

3026500

20

21

2

3

1

1971

1990

1971 1992

1972

187

189

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 187 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581,583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 189

Total Unit

Acres:

28.7 Prescription: 2, 3 - Clearcut

4 - 25% Removal

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 1,105

4 - 276 LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: Unit 189 is old growth consisting primarily of western hemlock as the dominant species along with Sitka 

spruce as a secondary component. Alaska-cedar is present in lesser amounts more so at the highest elevations. The 

average defect rating is considered to be moderate. Weather related damage is the main issue affecting the stand (stem 

breakage, checks, cracks, black seams, pistol butts). Mistletoe is light. Windthrow risk is high. All adjacent past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut (Alternatives 2, 3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 36 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy is planned to 

coincide with areas that were dropped from the unit due to soils concerns. Total mapped legacy is approximately 90 acres 

due entirely to soils drops. Any adjustments to the planned unit during implementation must consider the planned acreage 

and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

The uneven-aged single tree selection regeneration method is being prescribed for this unit in Alternative 4 specifically to 

maintain intact diverse structure for wildlife needed at this time and place in the landscape to meet the objectives of this 

alternative. This system is not optimum for promoting timber production but is being prescribed primarily to mitigate the 

overall effects of the project on wildlife.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on proposed NFS road 3026500 and existing NFS road 3000000.

 ENGINEERING/ROADS:

This unit is utilizing new landings on the proposed NFS road 3026500 being constructed for Unit 187 in Alternatives 2, 3, and 

4, totaling 600 feet. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 189 Alternatives 2, 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 189

Streams are tributaries to Luck Creek. (Stream A5, A6, A7, and A8 characteristics do not contain project specific field 

verified information.)

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed. 

Protection: Category B and C 

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 3 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout

Protection: Category B and C 

Stream#: 21 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: active erosion and unstable banks

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): Will be identified by IDT during layout

Protection: Category B and C 

Stream#: 18 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed.

Protection: Category B and C 

Stream#: 17 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top fo the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed

Protection: Category B and C

Stream#: 15 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed

Protection: Category B and C

Stream#: A5 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed.

Protection: Category B 

Stream#: A6 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed

Protection: Category B

Stream#: A7 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A8 Class: III Flagging: O/W C- Type: HCM
Unit 189

Concerns: none known

Buffer (RMA): Class III for HCM to the topp of the side-slope break.

Alternatives: 2, 3, and 4 Buffer (RAW): no review needed

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Most of the northeast border of unit borders the Ratz inventoried roadless area.

 SOILS/WETLANDS:

Slopes range from 30 to 105%. Forested wetlands occur on the shoulder slope in places. There are areas of slopes greater 

than 72% that are suitable for harvest with full suspension requirements. About 81 acres were excluded due to very high 

landslide potential, colluvial activity, MMI4 soils, steep slopes, and unstable drainages. In the remaining unit, full suspension 

yarding would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). Full suspension would be required in 

the unit to protect soils and wetlands (BMPs 12.5, 13.5, and 13.9)

 WILDLIFE:

Unit includes average snow deer winter range (southern 1/2 of unit). Legacy standard and guideline applies in this VCU; 

positioning of Legacy acres covers some deer winter range.

Alternative 4: Prescription is 25% basal area removal to minimize impacts to deer winter range. No Legacy acres required 

because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
3000330

3000305

3000000

A6

A1

A 3

A15

A 7

20

18

21

16

17

16

21.1L

17.1L

18

15

21

17

3

19

2

3

1

A8

A4

A5

A2

1970

1969

1971

2006

1995 1995

1969

1973 1971

1972

189

187

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 189 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000305

3000000

3000330

A5

A2

A6

A1

A 3

17

A15

A 7

18

21

16

17

16

21.1L

17.1L

18

15

21

3

20

19

2

3

1

A8

A4

1971

1969

2006

1970

1995 1995

1973 1971

1969

1972

189

581

582

187

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 189 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000330

3000305

3000000

A8

A4

A5

A2

A6

21

A1

A 3

A15

A 7

18

21

16

17

16

21.1L

17.1L

18

15

3

17

20

19

2

3

1

1995

1969

1971

2006

1970

1995

1969

1973 1971

1972

189

581

581

582

582

187

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 189 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 190

Total Unit

Acres:

22.7 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

742

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 190 is old-growth with the overstory consisting of western hemlock with variable amounts of Sitka 

spruce, western redcedar and Alaska-cedar. Stem decay is the primary damage. Alaska-cedar are experiencing decline in 

the area. Mistletoe is light. Windthrow risk is high. An even-age harvest with origin in 2000 is along the northern edge of 

these units, this past harvest marginally meets green-up requirements (14 acres). A two-aged clearcut with origin in 2006 is 

adjacent to the southwest boundary (56 acres). There has been heavy blowdown in this unit since harvest. This blowdown 

has continued across the boundary into unit 190. A partial cut timber harvest was conducted in the setting along the 

northwestern corner of this unit in 2010. No modifications to the size of unit 190 are needed to meet NFMA requirements for 

opening size. The combined acreage of these past harvest openings with the planned acreage of this harvest will not exceed 

100 acres. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 11 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy is planned to 

coincide with areas that were dropped from the unit due to karst and RMA's. Total mapped legacy is approximately 12 

acres. Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for a combination of cable and helicopter yarding. Cable settings are planned for 

uphill and downhill yarding to landings on the proposed temporary road and existing NFS road 3030110. Helicopter settings 

are planned for yarding to landings on the existing NFS road 3030110. 

Alternative 5: This unit is planned for a combination of cable and helicopter yarding. Cable settings are planned for downhill 

yarding to landings on existing NFS road 3030110. Helicopter settings are planned for yarding to landings on the existing 

NFS road 3030110.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2, 3, and 4, totaling 2100 feet, as displayed on the unit card. 

Approximately 500 feet of this road will be constructed across decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 190 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 190

Streams are tributaries to Luck Lake.

Stream#: LR1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed

Protection: Category B and C

Stream#: 1 Class: I Flagging: B/W C- Type: FPM

Concerns: none

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 190: Alternatives 2, 3, and 4 -- No known stream crossings. The new temporary road stream 

crossing would be on a new temporary road that is an extension of an existing decommissioned road 3030110_3.53R that 

would be reopened. The temporary roads have not been field verified and will be surveyed before implementation. Crossings 

structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction 

(BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

Although this unit is adjacent to significant karst resources to the north and east, there are no known karst or cave resource 

concerns with the harvest areas as currently mapped. Karst rock is mapped within the northeastern edge of the unit. Any 

adjustments to the planned unit during implementation must consider the adjacent karst.

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from gentle to 75%. All slopes greater than 72% are suitable for harvest with partial suspension. There are 

about 5 acres of slopes greater than 72% that are suitable for harvest with partial suspension. No wetlands were identified 

during field investigation. .A minimum of partial suspension yarding would meet soil and wetland resource concerns (BMPs 

12.5, 13.5, and 13.9). 

Alternatives 2, 3, and 4: The proposed temp road will not traverse wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit except southern edge). Legacy standard and guideline applies in 

this VCU; positioning of legacy acres covers some deer winter range.
3030114

3030110

3030110

LR1

A3

1

A2

2004

1993

1969

1969

2006

1993 1996

1969

2010

190

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 190 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030114

3030110

3030110

LR1

A3

1

A2

2004

1993

1969

1969

2006

1993 1996

1969

2010

190

580

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 190 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030114

3030110

3030110

LR1

A3

1

A2

2004

1993

1969

1969

2006

1993 1996

1969

2010

190

580

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 190 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3030114

3030110

3030110

LR1

A3

1

A2

2004

1993

1969

1969

2006

1993 1996

1969

2010

190

580

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 190 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 191

Total Unit

Acres:

14.1 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

275

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old growth structure consisting primarily of western hemlock. Sitka spruce and western 

redcedar are present, but as secondary components. Most of the stand has experienced heavy windthrow. This windthrow 

has created two distinct cohorts consisting of old growth western hemlock and Sitka spruce over young intermediate Sitka 

spruce and western hemlock. In the old growth western hemlock, heart rot and stem decay are high, while mistletoe is 

moderate. Defect and damages are also high in the oldest Sitka spruce. The western redcedar has moderate defect. 

Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for 

no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This unit is adjacent to the Coffman Cove Loop road and due to the combination of moderate SIO and foreground distance 

zone, requires minimal visibility of harvest openings from this road. In order to meet this requirement a screen of trees is 

being prescribed to be maintained to block the harvest area from view. Design this screen approximately as shown on the 

unit card map. Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as 

needed. 

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for downhill yarding to 

landings on the proposed temporary roads. Shovel settings are also planned for yarding to the proposed temporary roads.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary roads, totaling 700 feet, as displayed on the unit card.

 BOTANY:

One large population (565 individuals) of lesser round-leaved orchid (sensitive species) adjacent to unit on the northeast. No 

concerns.

 FISHERIES:

Unit

Number 191 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 191

Streams are tributaries to Eagle Creek. 

Stream#: 7 Class: II, III Flagging: B/W, O/W C- Type: HCM

Concerns: exposed bedrock

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and B 

Stream#: 4 Class: II, III Flagging: B/W, O/W C- Type: AFH, HCM, HCD

Concerns: blowdown, active erosion, steep side-slopes with loose soils and exposed bedrock, bedload storage.

Buffer (RMA): Class II for AFH greater of 140 feet or active portion of alluvial fan. Class II for HCM greater of 100 feet or to 

the top of the side-slope break. Class III for HCM and HCD to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and B 

Stream#: 4.1L Class: II, III Flagging: B/W, O/W C- Type: HCL

Concerns: blowdown

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL to the top of the 

side-slope break

Alternatives: 2, 3, and 5 Buffer (RAW): Will be determined by IDT during layout

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Most of the unit has a Moderate SIO and unit is along the 3030000 Road. A visual buffer is prescribed along the road to 

screen most views into unit. This screen will be designed for windfirmness. See silviculture section. With the screen, VAC 

is expected to be Intermediate and 15 to 40 acre openings are considered typical by the Forest Plan.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 30 to 50%. No wetlands have been identified in the unit. The area above the 3030000 road is suitable for 

harvest with partial suspension requirements. The soils and wetlands are suitable for a minimum partial suspension yarding 

or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be 

suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

The proposed temporary roads do not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 

acres .

Alternative 4: Unit dropped to maintain connectivity in the corridor from the Luck Lake area to the small OGR at the mouth of 

Eagle Creek in VCU 5810, and maintain deer winter range and marten habitat.
3030000

3030100

3030202

3030105

3030200

LAKE A1

7

4

2

3

4.1L

7.1 L

1.1R.7L.1L

7.1L.1L

7.1L

1.1R.7L.3L

1.1R

4

7.1L.2R

6

5

1.1R.7L.2R

7

4

1. 1R.7L.1L

1.1R.7L

1974

2005

1969

1989

1969

192

191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 191 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030000

3030202

3030105

3030200

3030100

4

1. 1R.7L.1L

1.1R.7L

LAKE A1

7

4

2

3

4.1L

7.1 L

1.1R.7L.1L

7.1L.1L

7.1L

1.1R.7L.3L

1.1R

4

7.1L.2R

6

5

1.1R.7L.2R

7

1974

2005

1969

1989

1969

192

469

470

572

191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 191 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030000

3030200

3030100

3030202

3030105

1.1R.7L

LAKE A1

7

4

2

3

4.1L

7.1 L

1.1R.7L.1L

7.1L.1L

7.1L

1.1R.7L.3L

1.1R

4

7.1L.2R

6

5

1.1R.7L.2R

7

4

1. 1R.7L.1L

1974

2005

1969

1989

1969

192

572

191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 191 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 192

Total Unit

Acres:

19.1 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

401

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The stand is mostly western hemlock with scattered western 

redcedar. Defect and damages are moderate for most species, but high in the larger western hemlock. The incidence of 

mistletoe is light to moderate. Little past windthrow is found within the stand, however exposure and timber type combine to 

increase risk. Moderate risk is estimated. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 8 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Part of the legacy is planned 

to coincide with areas that were dropped from the unit due to RMA's. The remaining required legacy was placed to block up 

POG, incorporate sensitive/rare plants, and reduce visibility from Luck Lake. Total mapped legacy is approximately 8 acres. 

Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill yarding to landings 

on the existing NFS road 3030000. Shovel settings are planned for yarding to the existing NFS road 3030000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

One population (7 plants) of lesser round-leaved orchid (sensitive plant) and one population (3 plants) of lance-leaf grapefern 

(rare plant) were entirely incorporated into legacy with a buffer, where they overalapped this unit. The lance-leaf grapefern 

population is the only known population of this species in the project area. Because of legacy, including the buffer, no direct 

or indirect effects to these populations are expected.

 FISHERIES:

Streams are tributaries to Eagle Creek. 

Stream#: 7 Class: I, II, III Flagging: B/W, O/W C- Type: HCM

Concerns: heavy braiding with exposed roots; steep side-slopes, shallow soils, bedrock

Buffer (RMA): Class I and II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of 

the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A and B 

Stream#: 7.1L Class: I, II, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none

Unit

Number 192 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 192

Buffer (RMA): Class I and II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 8 Class: I, II Flagging: B/W C- Type: FPL, HCO

Concerns: blowdown

Buffer (RMA): Class I for FPL greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Class I and II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

Stream#: 9 Class: I, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: Lake-A1 (Luck Lake) Class: 1 Flagging: B/W C- Type: L

Concerns: none known.

Buffer (RMA): Class I for Lake-1 greater of 100 horizontal feet or to the extent of the flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or one site-potential tree height. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The unit is along the 3030000 road and is Moderate SIO. Some screening occurs due to trees along the road, but much of 

the unit is visible. However, the unit is long and relatively narrow and it is not all visible at the same time. The unit is mostly 

screened from view from Luck Lake. Typical opening size given in the Forest Plan for Moderate SIO with Intermediate VAC 

is 15 to 40 acrrs.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from nearly level to 35%. Forested wetlands occur in the western tip of the unit and the center-southeast tip of 

the unit. The soils and wetlands are suitable for partial suspension cable yarding or shovel yarding. Shovel yarding should 

follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient are not recommended for shovel yarding due to wet conditions. 

Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and marten 

habitat and blocks up POG creating larger patch with adjacent Class I stream RMA and Luck Lake shore RMA.

Alternative 4: Unit dropped to maintain connectivity in the corridor from the small OGR in VCU 5810 to the Luck Lake area 

and to maintain more marten habitat and deer winter range around Luck Lake.
3030200

3030000

3030105

3030202

3030100

10

7 .1L

LUCK LAKE

8

4

10.1R

LAKE A1

7

1

10.2R

7.1L.1L

10.1R.2L

10.2R.1L

7.1L

7.1L.2R

6

10.2R.2L

10.1R.2L.1L

10

7

2

9

10.1R

7

10.2R

3

10.1R.2L

10.1R.1L

2005

1974 1989

1969

1989

1968

1969

1969

1969

192

193

194

191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 192 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030202

3030100

3030200

3030105

3030000

10.1R.2L

10.1R.1L

10

7 .1L

LUCK LAKE

8

10.2R.1L

1

LAKE A1

7

4

10.2R

7.1L.1L

10.1R.2L

7.1L

7.1L.2R

6

10.2R.2L

10.1R.2L.1L

10

10.1R

7

2

9

10.1R

7

10.2R

3

1974

2005

1989

1969

1989

1969

1969

1969

1968

192

193

194

571

191 572

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 192 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030202

3030100

3030200

3030105

3030000

10.1R.2L

10.1R.1L

10

7 .1L

LUCK LAKE

8

10.2R.1L

1

LAKE A1

7

4

10.2R

7.1L.1L

10.1R.2L

7.1L

7.1L.2R

6

10.2R.2L

10.1R.2L.1L

10

10.1R

7

2

9

10.1R

7

10.2R

3

1974

2005

1989

1969

1989

1969

1969

1969

1968

192

193

194

571

191 572

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 192 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

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Unit 193

Total Unit

Acres:

8.9 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

307

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 193 has old-growth stand structure with overstory species consisting of western hemlock, Sitka 

spruce and western redcedar. The average defect for the unit is light to moderate with stem decay as the dominant defect. 

Overall this unit has mature timber that is high volume, high quality and relatively healthy. Growth is static. Mistletoe is light. 

Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for 

no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

Due to this unit being in a moderate SIO and foreground distance zone, harvest opening of 5 to 10 acres are allowed. The 

unit is currently slightly less than this as designed. This stand is being recommended for harvest at this time because it is not 

expected to obtain the desired condition given the current growth trajectory. This stand is mature with low to moderate levels 

of decay and defect resulting in a situation where stand growth is being offset by decay. Even-aged clear cutting is being 

prescribed to preclude or minimize the risk of windthrow post harvest, promote natural regeneration by opening up the 

canopy, and minimize defect and disease in the future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for uphill cable yarding to landings on existing NFS road 3030000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Eagle Creek. 

Stream#: 8 Class: I, II Flagging: B/W C- Type: FPL, HCO

Concerns: blowdown

Buffer (RMA): Class I for FPL greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Class I and II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed.

Protection: Category A 

Stream#: 9 Class: I, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed.

Protection: Category A and C

Stream#: 10 Class: I Flagging: B/W C- Type: AFM, MMS, HCL 

Concerns: blowdown

Unit

Number 193 Alternatives 2, 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 193

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of alluvial fan. Class I for MMS greater of 120 feet, flood 

plain, riparian vegetation or soils, or riparian associated wetland fens. Class I for HCL greater of 100 feet or to the top of the 

side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C

Stream#: 10.1R Class: I, II, III Flagging: B/W, O/W C- Type: AFM, HCM 

Concerns: blowdown

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of alluvial fan. Class I and II for HCM greater of 100 feet 

or to the top of the side-slope break. Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and B 

Stream#: 10.1R.1L Class: I, II, IV Flagging: B/W, G/W C- Type: MMO, HCO 

Concerns: blowdown

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C 

Stream#: 10.1R.2L Class: I, II, IV Flagging: B/W, G/W C- Type: MMO, HCO 

Concerns: blowdown

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens side-slope break. Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C 

Stream#: 10.1R.2L.1L Class: I, IV Flagging: B/W, G/W C- Type: HCO 

Concerns: blowdown

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C 

Stream#: 10.2R	 Class: I, II, IV Flagging: B/W, G/W C- Type: MMO, HCO 

Concerns: blowdown

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens side-slope break. Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed. 

Protection: Category A and C

Stream#: Lake-A1 (Luck Lake) Class: 1 Flagging: B/W C- Type: L

Concerns: none known.

Buffer (RMA): Class I for Lake-1 greater of 100 horizontal feet or to the extent of the flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or one site-potential tree height. 

Alternatives: 2, 3, and 5 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

The unit is along the 3030000 road and is in Moderate SIO. Screening occurs due to riparian buffers that cross the unit, so 

that only small portions of the unit are visible at a time. Also, the unit is long and relatively narrow. The unit is mostly 

screened from view from Luck Lake. Typical opening size given in the Forest Plan for Moderate SIO with Intermediate VAC 

is 15 to 40 acrrs.
Unit 193

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 15 to 35%. Forested wetlands are dominant in the unit. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 

acres .

Alternative 4: Unit dropped to maintain connectivity in the corridor from the small OGR in VCU 5810 to the Luck Lake area, to 

maintain a greater buffer around Luck Lake, and maintain marten habitat and deer winter range.
3030202

3030000

1.1L

LUCK LAKE

8

LAKE A1

LAKE A1

7

10.1R.2L.1L

2

A10

A9

1

2L.1L .1L.1R

10.2R

1.3 L

7.1L.1L

5

10.1R.2L

10.2R.1L

4

7.1L

3

7.1L.2R

10.2R.2L

10

10.1R

9

2

1.2L

1.1L

10.1R

7

10.2R

3

10.1R.2L

10.1R.1L

10

2

7.1L

1969

1989

1969

1969

1968

1968

1968

1969

193

194

192

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 193 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

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3030000

3030202

2

7.1L

LUCK LAKE

8

LAKE A1

LAKE A1

10.2R.2L

7

2

A10

A9

1

1.1L

2L.1L .1L.1R

10.2R

1.3 L

7.1L.1L

5

10.1R.2L

10.2R.1L

4

7.1L

3

7.1L.2R

10

10.1R.2L.1L

10.1R

9

2

1.2L

1.1L

10.1R

7

10.2R

3

10.1R.2L

10.1R.1L

10

1989

1969

1969

1969

1969

1968

1968

1968

193

194

570

571

192

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 193 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030000

3030202

2

7.1L

LUCK LAKE

8

LAKE A1

LAKE A1

10.2R.2L

7

2

A10

A9

1

1.1L

2L.1L .1L.1R

10.2R

1.3 L

7.1L.1L

5

10.1R.2L

10.2R.1L

4

7.1L

3

7.1L.2R

10

10.1R.2L.1L

10.1R

9

2

1.2L

1.1L

10.1R

7

10.2R

3

10.1R.2L

10.1R.1L

10

1989

1969

1969

1969

1969

1968

1968

1968

193

194

570

571

192

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 193 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 194

Total Unit

Acres:

2, 3 - 76.2

4, 5 - 81.7

Prescription: 25% & 33% 

Removal, 

Clearcut

VCU

Number:

581 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

2, 3 - 1,650

4 - 708

5 - 1,181

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock with Sitka 

spruce, western redcedar and Alaska-cedar mixed. Overall the unit rated high for wind risk and has light mistletoe. There is 

evidence of high defect, primarily stem decay, in the western hemlock and Sitka spruce overstory. The average damage and 

defect rating is moderate to high. The Alaska-cedar had evidence of decline along the transition to muskeg on the northwest 

boundary. A two-age stand adjacent to the boundary south has lost 25% of residual trees since harvest in 2005. The 

combined acreage of this past harvest and the maximum proposed clear cut acreage for unit 194 is approximately 77 acres. 

No adjustments to unit 194 are required to meet NFMA opening size requirements under any alternative. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management (Alternatives 2, 3, 5 Cable and Shovel Settings)

This unit has a low SIO and is primarily in the middleground. This classification allows for harvest openings of 40 to 60 acres. 

The unit as currently desined will have 51 acres of clearcut in Alternatives 2 and 3. This stand is being recommended for 

harvest at this time because it is not expected to obtain the desired condition given the current growth trajectory. This stand 

is mature with moderate to high stem decay and defect resulting in a situation where stand growth is being offset by decay. 

Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, promote natural 

regeneration by opening up the canopy, and minimize defect and disease in the future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. Alternatives 2 and 3 consist of 52 acres of even-age management, and 

require approximately 23 acres of legacy. Alternative 5 has 28 acres of even-age management and requires 14 acres of 

legacy. Alternative 4 consists entirely of uneven-age management and doesn't require any legacy retention. Required legacy 

should consist of productive old growth representative of the overall composition of the planned harvest area, and will be 

maintained indefinitely. A large portion of the original unit prescribed partial harvest. Legacy to cover remaining opening is 

provided by RMA complex and connecting polygons of legacy, which blocks up POG and is adjacent to partial harvest. Total 

mapped legacy is approximately 23 acres in Alternatives 2 and 3 and 17 acres in Alternative 5. Any adjustments to the 

planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 2, 3, 4, 5 Helicopter Settings)

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription. 

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

Silvicultural Prescription: Uneven-age Management Group Selection (Alternative 4 Cable and Shovel Settings)

Harvest up to 33% of the planned setting acreage in groups of trees up to two acres in size. Group selections should be well 

distributed across the stand. Locate groups to address insect and disease issues or capitalize on existing advanced 

regeneration of desirable tree species where possible. In general, locate group selections to maintain wildlife travel ways and 

important habitat while maximizing the economics of this entry and also maintaining the feasibility of future harvest entries in 

the remaining old growth portions of the unit. The uneven-aged group selection regeneration method is being prescribed for 

the unit or portions of the unit as a means to maintain large amounts of diverse structure to benefit wildlife in perpetuity. 

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

Unit

Number 194 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation
Unit 194

 TIMBER/LOGGING:

Alternatives 2, 3, 5: This unit is planned for a combination of cable, shovel and helicopter yarding. Cable settings are 

planned for uphill and downhill yarding to landings on the proposed temporary roads. Shovel settings are planned for yarding 

to the proposed temporary roads and existing NFS roads 3030200 & 30302022. Helicopter settings are planned for yarding 

to landings on existing NFS road 3030202. 

Alternative 4: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding 

to the existing NFS roads 3030200 & 30302022. Helicopter settings are planned for yarding to landings on the existing NFS 

road 3030202.

Alternatives 2 and 3 propose even-age management on cable and shovel settings, and uneven-age management single tree 

selection with 75% retention on helicopter settings. Alternative 4 proposes uneven-age management group selection with 

67% retention on cable and shovel settings, and uneven-age management single tree selection with 75% retention on 

helicopter settings. Alternative 5 proposes even-age management on shovel settings, and uneven-age management single 

tree selection with either 75% or 50% retention on helicopter settings.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternatives 2, 3, and 4, totaling 2,400 feet, as displayed on the unit 

card. Approximately 2,000 feet of this road will be constructed across previously decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Eagle Creek. 

Stream#: 7 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion, unstable side-slopes

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): none

Protection: Category B and C

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCM

Concerns: blowdown and active erosiont 

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCM none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 1.3L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 1.2L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 1.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC and MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 INVASIVE SPECIES:

No Concerns
Unit 194

Temporary roads for Unit 194: Alternatives 2, 3, and 4 -- Two Class III crossings and two Class IV crossings. The temporary 

roads have not been field verified and will be surveyed before implementation. If any stream crossings are found, crossings 

structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction 

(BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely in Low SIO. Legacy screens much of the harvest. No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15 to 75%. There is about 1 acre of slopes greater than 72% that are suitable for harvest with full 

suspension; these slopes are in the area to be logged by helicopter. Forested wetlands are intermittent in the unit. Full 

suspension yarding is required in the southern quarter of the unit in order to meet soil and wetland resource concerns (BMPs 

12.5, 13.5, and 13.9). In the remainder of the unit, a minimum of partial suspension yarding would meet soil and wetland 

resource concerns (BMPs 12.5, 13.5, and 13.9). In the north part of the unit, soils and wetlands are suitable for shovel 

yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel 

yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid 

track slippage and rutting. 

Alternatives 2-4: A temporary road will impact 2 acres of forested wetland within the unit and less than 1/4 acre outside of 

the unit, necessary to provide road access the southern half of the unit. Wetland avoidance was not practicable due to the 

abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the road after harvest (BMP 

14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (southeastern lobe of unit). Bald eagles observed in unit. Legacy standard and guideline applies in this VCU; 

positioning of Legacy acres covers some deer winter range and martenhabitat.

Alternative 4: Includes settings with 25% basal area removal and small patch cuts with 33% removal by acreage to maintain 

habitat values in the vicintiy of Luck Lake. No Legacy acres required because adequate structure retained in unit under 

uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
3030000

3030200

3030202

3030200

10.2R 1

1.1L

2

1

1.3L

8

1.2L

10.1R

7

1

10.2R

1.1L.1L

1.1L.1R

10.1R.1L

1.3L.1R

1.1R

1.3L.1L

1.1L

5

1.2R

10.1R.2L

10

4

1.2L 1.2L.1L

3

1.2L.3R

1.2R

7.2L

10.2R.2L

1.4L

1.2L.1R

7.1R

1.1L

3

2

2

1989

1989

1990

2005

1969

1990

1968 1968

194

195

193

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 194 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030200

3030000

3030200

3030202

10.1R

2

1

1.1L

2

1

8

1.3L

1.2L

10.2R

7

1

10.2R

1.1L.1L

1.1L.1R

10.1R.1L

1.3L.1R

1.1R

1.3L.1L

1.1L

5

1.2R

10.1R.2L

10

4

1.2L 1.2L.1L

3

1.2L.3R

1.2R

7.2L

10.2R.2L

1.4L

1.2L.1R

7.1R

1.1L

3

2

1989

1989

1969

2005

1990

1990

1968 1968

194

195

571

193

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 194 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030000

3030200

3030202

3030200

10.2R 1

1.1L

2

1

1.3L

8

1.2L

10.1R

7

1

10.2R

1.1L.1L

1.1L.1R

10.1R.1L

1.3L.1R

1.1R

1.3L.1L

1.1L

5

1.2R

10.1R.2L

10

4

1.2L 1.2L.1L

3

1.2L.3R

1.2R

7.2L

10.2R.2L

1.4L

1.2L.1R

7.1R

1.1L

3

2

2

1989

1989

1990

2005

1969

1990

1968 1968

195

571

194

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 194 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3030200

3030000

3030200

3030202

10.1R

2

1

1.1L

2

1

8

1.3L

1.2L

10.2R

7

1

10.2R

1.1L.1L

1.1L.1R

10.1R.1L

1.3L.1R

1.1R

1.3L.1L

1.1L

5

1.2R

10.1R.2L

10

4

1.2L 1.2L.1L

3

1.2L.3R

1.2R

7.2L

10.2R.2L

1.4L

1.2L.1R

7.1R

1.1L

3

2

1989

1989

1969

2005

1990

1990

1968 1968

194

195

571

193

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 194 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 195

Total Unit

Acres:

39.6 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,297

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. Windthrow risk is moderate throughout the stand. Mistletoe was 

rated low. The overstory is made of widely-spaced mature western hemlock and Alaska-cedar with scattered Sitka spruce 

and western redcedar. The primary defect in the overstory is stem decay. Alaska cedar decline was also evident in the upper 

elevations where drainage is restricted. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high stem decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 17 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The largest portion of legacy 

was placed to coincide with areas dropped due to soils and RMA. 2.7 ac of legacy was added adjacent to RMAs to divide 

unit into two openings and for RAW. Total mapped legacy is approximately 17 acres.

 TIMBER/LOGGING:

Alternatives 2, 3, 4: This unit is planned for a combination of shovel, helicopter, and cable yarding. Cable settings are 

planned for uphill yarding to landings on the proposed temporary road. Shovel settings are planned for yarding to the 

proposed temporary road. Helicopter settings are planned for yarding to landings on the proposed temporary road. 

Alternative 5: This unit is planned for helicopter yarding to landings on existing NFS road 3030200.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternatives 2, 3, and 4, totaling 2100 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Eagle Creek. 

Stream#: 1 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCM, HCO

Concerns: active erosion, unstable side-slopes

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break. Class IV for HCM none.

Alternatives: 2, 3, 4, and 5			 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 1.1L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCM, HCO

Concerns: blowdown, active erosion, and unstable side-slopes

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5			 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Unit

Number 195 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 195

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none			 Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 195: Alternatives 2, 3, and 4 -- Two Class III crossings and two Class IV crossings. The temporary 

roads have not been field verified and will be surveyed before implementation. If any stream crossings are found, crossings 

structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction 

(BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is almost entirely in Very Low SIO, with 4 acres of Low. No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from nearly level to 45% in the area proposed for harvest. About 8 acres outside of the unit were excluded due 

to steep slopes and soil concerns. A minimum of partial suspension yarding would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). Forested wetlands are located throughout the unit, especially in the upper elevations of the unit.

Alternatives 2-4: A temporary road will impact about 2 acres of forested wetland and about 1/4 acre of emergent short sedge 

wetland to access the southern portion of the unit. About an additional 1/4 acre of forested wetland outside of the unit will be 

impacted by a temporary road needed to access the unit. Wetland avoidance was not practicable due to the abundance of 

forested wetland. Provide adequate cross drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR 

BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (southeastern edge of northern portion of unit). Legacy standard and guideline 

applies in this VCU; positioning of Legacy acres covers some deer winter range.
3030200

3030200

1.2

1.2R

1.4L

1

1.3L.1R

1.3L.1L

1.6L

1.3R

1.2R

1.4L

1

1.2L.3R

1.1L.2R

1.2L

1.1L

1.1L.1L

1.5R

1.3L

1.1L

1

1990

2005

1968

1990

194

195

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 195 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030200

3030200

1.2

1.2R

1.4L

1

1.3L.1R

1.3L.1L

1.6L

1.3R

1.2R

1.4L

1

1.2L.3R

1.1L.2R

1.2L

1.1L

1.1L.1L

1.5R

1.3L

1.1L

1

1990

2005

1968

1990

194

195

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 195 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030200

3030200

1.2

1.2R

1.4L

1

1.3L.1R

1.3L.1L

1.6L

1.3R

1.2R

1.4L

1

1.2L.3R

1.1L.2R

1.2L

1.1L

1.1L.1L

1.5R

1.3L

1.1L

1

1990

2005

1968

1990

194

195

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 195 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3030200

3030200

1.2

1.2R

1.4L

1

1.3L.1R

1.3L.1L

1.6L

1.3R

1.2R

1.4L

1

1.2L.3R

1.1L.2R

1.2L

1.1L

1.1L.1L

1.5R

1.3L

1.1L

1

1990

2005

1968

1990

194

195

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 195 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 197

Total Unit

Acres:

13.3 Prescription: 25% Removal

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

54

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with overstory consisting of western hemlock and Alaska-cedar 

with a minor component of Sitka spruce and western redcedar. This is a high elevation stand of mature timber with declining 

growth. The main damage is stem decay with moderate rating. Mistletoe was rated low. Windthrow risk is moderate. An 

adjacent past harvest to the east has regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives.

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species.Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3030000.

 ENGINEERING/ROADS:

Np proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Eagle Creek. Streams A8, A8.1R, and A8.2R characteristics do not contain project specific field 

verified information.

Stream#: A8 Class: III, IV Flagging: O/W, G/W C- Type: HCDw, HCLw

Concerns: none known

Buffer (RMA): Class III for HCDw to the top of the side-slope break. Class IV for HCLw none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review required

Protection: Category B and C 

Stream#: A8.1R Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review required

Protection: Category B 

Stream#: A8.2R Class: III Flagging: O/W C- Type: HCDw

Concerns: none known

Buffer (RMA): Class III for HCDw to the top of the side-slope break.

Unit

Number 197 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 197

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review required

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

SIO is Low and VAC is also Low because of steepness. With uneven-aged management there are no concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 30 to 85%. There is a 1⁄2 acre of slopes greater than 72% that is suitable for harvest with partial cut and full 

suspension. There are isolated pockets of forested wetland in the unit. These areas are located in the southwestern 

boundary of the unit between 30 to 55%. In the remainder of the unit, about 15% of the unit is forested wetlands. About 4 

acres were excluded due to very high landslide potential, colluvial activity, steep slopes, and unstable drainages. The 

remainder of the unit is suitable for harvest with full suspension and partial harvest. (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because adequate structure retained in unit under uneven-aged harvest prescription 

(i.e., no openings larger than 20 acres).
3030000

A8

1

3

2

A6

A7

A8.29

A8.1R

A8

A8

1968

1968

1968

1968

2006

1995

2010

197

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 197 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030000

A8

1

3

2

A6

A7

A8.29

A8.1R

A8

A8

1968

1968

1968

1968

2006

1995

2010

197

570

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 197 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3030000

A8

1

3

2

A6

A7

A8.29

A8.1R

A8

A8

1968

1968

1968

1968

2006

1995

2010

197

570

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 197 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3030000

A8

1

3

2

A6

A7

A8.29

A8.1R

A8

A8

1968

1968

1968

1968

2006

1995

2010

197

570

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 197 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 200

Total Unit

Acres:

18.3 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

222

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure with over-mature timber that shows declining volume growth. The 

overstory consists of western hemlock as the dominant species. Secondary species include Sitka spruce, and patchy Alaskacedar with widely scattered western redcedar. The dominant damage is stem decay as indicated by cracks and black 

seams. Mistletoe was rated low. Windthrow risk is moderate. A past even-age harvest with origin in 1987 is to the east. An 

even-age harvest from 1992 and a partial cut cable unit from 2000 are to the north. These areas all meet the green-up 

requirements of NFMA.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. Original opening size was 28 acres; this requires that approximately 8 

1/2 acres of productive old growth representative of the overall composition of the planned harvest area be maintained 

indefinitely. Legacy was placed to block up POG and divde unit into two smaller openings, as well as reduce visibility of most 

visible area. Total mapped legacy is approximately 9 3/4 acres. Any adjustments to the planned unit during implementation 

must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of cable and helicopter yarding. Cable settings are planned for downhill yarding to 

landings on the existing NFS road 3000329. Helicopter settings are planned for yarding to landings on existing NFS road 

3000329.

 ENGINEERING/ROADS:

Np proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. 

All streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

Unit

Number 200 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 200

 SCENERY:

Unit is mostly Very Low SIO with 4 acres of Low. No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 35 to over 72%. There are about 2 acres of slopes greater than 72% that are suitable for harvest with full 

suspension. A 2002 debris avalanche runs downslope in the middle of the southern setting. A second debris avalanche 

enters the northern legacy patch adjacent to the northern setting. No wetlands have been mapped in the unit. Full 

suspension yarding is required to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some marten habitat and deer winter 

range.
3000329

3030000

3000328

3000000

2

2

1

6

6

1

3

9

8

A1.1L

15

A1 A1

5

5.1L

7

4

8.1R

6

1968 1968 2006

1972

1969

1969

1973

1992

2005

1968

1987

1987

1969

1971

201

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 200 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000328

3000000

3030000

3000329

8.1R

2

2

1

6

6

1

3

9

A1.1L

15

A1

8

A1

5

5.1L

6

7

4

1968 1968 2006

1972

1969

1969

1992

2005

1973

1987

1969

1971

1968

1987

201

568

569

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 200 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000329

3000000

3000328

3030000

8.1R

6

2

2

1

5.1L

6

1

3

9

A1.1L

15

A1

8

A1

5

6

7

4

1968 1968 2006

1972

1969

1973

1992

2005

1969

1969

1971

1987

1968

1987

201

568

568

569

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 200 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000329

3000000

3000328

3030000

8.1R

6

2

2

1

5.1L

6

1

3

9

A1.1L

15

A1

8

A1

5

6

7

4

1968 1968 2006

1972

1969

1973

1992

2005

1969

1969

1971

1987

1968

1987

201

568

568

569

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 200 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 201

Total Unit

Acres:

2, 3, 5 - 94.9

4 - 114.6

Prescription: 2, 3, 5 - 

Clearcut, 50% 

Removal

4 - 50% Removal

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2, 3, 5 - 

2,240

4 - 1,537

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: Unit 201 has old-growth stand structure. The overstory consists of western hemlock as the dominant 

species. Secondary species include Sitka spruce, and patchy Alaska-cedar with western redcedar in the southern half of the 

unit. The dominant damage is stem decay, indicated by cracks and black seams. Mistletoe was rated low. Windthrow risk is 

moderate. An adjacent past harvest to the east has regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut (Alternatives 2, 3, 5 settings as shown on unit card)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. About 103 acres of the unit represented a potential opening; this requires 

approximately 31acres of productive old growth representative of the overall composition of the planned harvest area be 

maintained indefinitely. Legacy within these 103 acres included RMAs and to block up large areas building off of RMAs, to 

divide the opening into three openings, also reducing visibility. Total mapped legacy is approximately 31 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4, Alternatives 2, 3, 5 settings as 

shown on unit card)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS roads 3000329, 3000328, and 3000331.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 201 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 201

Streams are tributaries to Luck Creek. (Location is depicted from confluence to headwaters)

Stream#: 3 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCD, HCO

Concerns: Active erosion

Buffer (RMA): Class III or HCM and HCD to the top of the side-slope break. Class IV HCO none.

Alternatives: 2, 3, and 5 Buffer (RAW): Will be identified by IDT during layout.

Alternative: 4 Buffer (RAW): no review needed.

Protection: Category B and C 

Stream#: 5 Class: III, IV Flagging: O/W, G/W C- Type: HCV, HCO

Concerns: Blowdown and active erosion

Buffer (RMA): Class III for HCV to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 6 Class: III, IV Flagging: O/W, G/W C- Type: HCV, HCO

Concerns: Blowdown and active erosion

Buffer (RMA): Class III for HCV to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C

Stream#: 8 Class: III Flagging: O/W C- Type: HCM, HCO

Concerns: blowdown

Buffer (RMA): Class III for HCM and HCO to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B 

Stream#: 9 Class: III Flagging: O/W C- Type: HCD

Concerns: blowdown

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B 

Stream#: 15 Class: III Flagging: O/W C- Type: HCD

Concerns: active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B 

Stream#: 16 Class: III Flagging: O/W C- Type: HCD

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B 

Stream#: 16.1R Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and Active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C

Stream#: 16.2R Class: III, IV Flagging: O/W, G/W C- Type: HCM

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCM none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

No Concerns
Unit 201

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely Very Low SIO. No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from nearly level to 100%. There are about 9 acres of mapped slopes greater than 72% in the harvest unit that 

are suitable for full suspension harvests. Forested wetlands occur in about 1/3 of the unit. Full suspension yarding is required 

to meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (southern 3/4 of unit). Legacy standard and guideline applies in this VCU; 

positioning of Legacy acres covers some deer winter range.

Alternative 4: Prescription is 50% basal area removal for entire unit to minimize impacts to connectivity and marten habitat in 

the Luck Creek drainage. No Legacy acres required because adequate structure retained in unit under uneven-aged harvest 

prescription (i.e., no openings larger than 20 acres).
3000000

3000328

3000329

15

3

9

8

17

15

16

5

5.1L

7

19

6 2. R

4

2

18

16

8.1R

6

6.1R

2

1

6

1

6

1972

1973

1992

2005

1987

1969

1987

1995

201

202

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 201 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000328

3000329

15

3

9

8

17

15

16

5

5.1L

7

19

6 2. R

4

2

18

16

8.1R

6

6.1R

2

1

6

1

6

1972

1973

1992

2005

1987

1969

1987

1995

201

202

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 201 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3000328

3000329

15

3

9

8

17

15

16

5

5.1L

7

19

6 2. R

4

2

18

16

8.1R

6

6.1R

2

1

6

1

6

1972

1973

1992

2005

1987

1969

1987

1995

201

202

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 201 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

3000328

3000329

15

3

9

8

17

15

16

5

5.1L

7

19

6 2. R

4

2

18

16

8.1R

6

6.1R

2

1

6

1

6

1972

1973

1992

2005

1987

1969

1987

1995

201

202

200

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 201 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 202

Total Unit

Acres:

49.6 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

1,429

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: Unit 202 has old-growth stand structure with an overstory composition of western hemlock, western 

redcedar, Sitka spruce and Alaska-cedar. Moderate heart rot and stem decay are the primary damages. Mistletoe is low. 

Windthrow risk is moderate. This is a mature stand with static to declining growth. All adjacent past harvest areas have 

regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm, stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 22 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to build 

off RMAs, and add RAW. Total mapped legacy is approximately 23 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS roads 3000331 and 3000334.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. 

Stream#: 29 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown, active erosion, with rubble piles present in channel.

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C

Stream#: 24 Class: III Flagging: O/W C- Type: HCM

Concerns: blowdown and active erosion, steep side-slopes with shallow soils and exposed bedrock

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B 

Stream#: 23 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: Blowdown and active erosion, steep side-slopes with shallow soils and exposed bedrock

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Unit

Number 202 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 202

Protection: Category B and C 

Stream#: 19 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: Blowdown and active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C 

Stream#: 17 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category B and C

All other streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely Very Low SIO. No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from nearly level to 90%. There are about 20 acres of mapped slopes greater than 72% in the harvest unit that 

are suitable for full suspension harvest. An alder revegetated debris torrent initiated near the upper unit boundary and 

extends below the unit. This debris torrent can be operated around. Full suspension yarding is required to meet soil and 

wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

There are approximately 5 acres (10% of the unit) of forested wetland adjacent to the southwestern unit boundary of the west 

polygon (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (eastern 1⁄2 of unit). Legacy standard and guideline applies in this VCU; 

positioning of Legacy acres covers some deer winter range.
3000334

3000328

3000000

6 1.

19

23

29.1L

27

18

29

31

33

32

30

16

23

26

45

25

29

17

24

1973

1988

1995

1973

1972

201

202

202

202

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 202 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000334

3000328

3000000

6 1.

19

23

29.1L

27

18

29

31

33

32

30

16

23

26

45

25

29

17

24

1973

1988

1995

1973

1972

201

202

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 202 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000334

3000328

3000000

6 1.

19

23

29.1L

27

18

29

31

33

32

30

16

23

26

45

25

29

17

24

1973

1988

1995

1973

1972

201

202

202

202

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 202 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000334

3000328

3000000

6 1.

19

23

29.1L

27

18

29

31

33

32

30

16

23

26

45

25

29

17

24

1973

1988

1995

1973

1972

201

202

202

202

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 202 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 203

Total Unit

Acres:

72.1 Prescription: Clearcut, 50% 

Removal

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

2,130

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit is old-growth timber with the overstory consisting primarily of western hemlock, Alaska-cedar 

and Sitka spruce. Mountain hemlock are abundant in the higher elevations. The unit has over-mature timber with moderate 

stem decay and defects. Mistletoe is low. Windthrow risk is moderate. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut (Alternatives 2, 3, 4, 5 settings as shown on unit card)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 26 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy consists of soils 

drops and RMAs. Total mapped legacy is approximately 36 acres and consists entirely of drops for soils and RMAs. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternatives 2, 3, 4, 5 settings as shown on unit 

card)

Maintain at least 50 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on existing NFS road 3000340 and the proposed temporary road 

accessing Unit 206. Helicopter yarding would occur over existing NFS road 3000000, and traffic control would likely be 

necessary.

 ENGINEERING/ROADS:

Unit utilizes the proposed temporary road constructed in Unit 206, totaling 1,100 feet, as shown on the Unit 206 unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 203 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 203

Streams are tributaries to Luck Creek. 

Stream#: 6 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: blowdown and active erosion

Buffer (RMA): Class III for HCD and HCO to the top of the side-slope break. Class IV for HCO none.

Protection: Category B and C 

Stream#: 20 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown and active erosion in Class III, steep side-slopes with shallow soils and exposed bedrock.

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout

Protection: Category B and C 

Stream#: 10 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCM

Concerns: blowdown and active erosion in Class III, steep side-slopes with shallow soils and exposed bedrock.

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout

Protection: Category B and C

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

 GEOLOGY/KARST:

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from 40 to greater than 72%. Slopes inside the V-notches range from 100 percent to near vertical. Slopes 

outside of the V-notches range from 35 to 60 percent. Minor areas of forested wetlands were identified. All slopes exceeding 

72% are included in soil exclusion area. About 26 acres was excluded due to very high landslide potential, colluvial activity, 

steep slopes, and unstable drainages. The remainder of the unit is suitable for harvest with full suspension and partial 

harvest.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; positioning of 

Legacy acres covers some deer winter range.
3000000

20

6.2L

6.1L

6.1R

7

8

6.2R

6

10

45

1.1R

20

1973

1972

1987

1994 1994

1974

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 203 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

574,581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

20

6.2L

6.1L

6.1R

7

8

6.2R

6

10

45

1.1R

20

1973

1972

1987

1994 1994

1974

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 203 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

574,581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

20

6.2L

6.1L

6.1R

7

8

6.2R

6

10

45

1.1R

20

1973

1972

1987

1994 1994

1974

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 203 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

574,581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

20

6.2L

6.1L

6.1R

7

8

6.2R

6

10

45

1.1R

20

1973

1972

1987

1994 1994

1974

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 203 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

574,581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 204

Total Unit

Acres:

8.9 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

176

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth structure. The overstory consists of a mixture of western hemlock and western 

redcedar. Sitka spruce are present in lesser amounts. The main damage is stem form with light to moderate stem decay. 

Overall the average defect rating for the whole unit is moderate. Mistletoe was rated as low. Windthrow risk is moderate. All 

adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 3000000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. 

Stream#: 1.11R.1R Class: I Flagging: B/W C- Type: FPO, FPS, PAB, AFM

Concerns: extreme braiding present

Buffer (RMA): Class I for FPO and FPS greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class I for PAB greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Class I for AFM greater of 140 feet or active portion of alluvial fan.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

Stream#: 1.11R.1R.1R Class: I Flagging: B/W C- Type: MMO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A

Stream#: 1 Class: I Flagging: B/W C- Type: FPM

Concerns: none

Unit

Number 204 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 204

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A

Stream#: 1.10R Class: I Flagging: B/W C- Type: PAO

Concerns: none

Buffer (RMA): Class I for PAO greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): no review needed.

Protection: Category A 

Temporary roads for Unit 206: Alternatives 2, 3, 4, and 5 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. Forested wetlands are located throughout the unit. The soils and wetlands are suitable 

for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the 

small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding 

under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track 

slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.
3000000

3000336

3000331

3000341

3000340

1.11 R

1.10 R

1.11R.1R

1.11R.1 R

20

1.1 R

1.20R

1

1

1.11R.1R.1R

6.2L

6.1L

6.1R

7

8

6.2R

6

1.20R.3R

1973

1987

1973

1973

1974

1974

1974

1991

1974

1974

204

203

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 204 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000000

3000336

3000331

3000341

3000340

1.11 R

1.10 R

1.11R.1R

1.11R.1 R

20

1.1 R

1.20R

1

1

1.11R.1R.1R

6.2L

6.1L

6.1R

7

8

6.2R

6

1.20R.3R

1973

1987

1973

1973

1974

1974

1974

1991

1974

1974

204

203

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 204 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000000

3000336

3000331

3000341

3000340

1.11 R

1.10 R

1.11R.1R

1.11R.1 R

20

1.1 R

1.20R

1

1

1.11R.1R.1R

6.2L

6.1L

6.1R

7

8

6.2R

6

1.20R.3R

1973

1987

1973

1973

1974

1974

1974

1991

1974

1974

204

203

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 204 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000000

3000336

3000331

3000341

3000340

1.11 R

1.10 R

1.11R.1R

1.11R.1 R

20

1.1 R

1.20R

1

1

1.11R.1R.1R

6.2L

6.1L

6.1R

7

8

6.2R

6

1.20R.3R

1973

1987

1973

1973

1974

1974

1974

1991

1974

1974

204

203

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 204 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 206

Total Unit

Acres:

3.6 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

83

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists mostly of western Hemlock and Sitka 

Spruce. The major damage agent is stem decay. Mistletoe is low. Windthrow risk is high. There is extensive recent 

windthrow in the unit. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for 

no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1100 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. (Location is depicted from confluence to headwaters)

Stream#: 1 Class: I Flagging: B/W C- Type: PAM

Concerns: none

Buffer (RMA): Class I for PAM greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during Layout.

Protection: Category A 

Stream#: -1.1R Class: I Flagging: B/W C- Type: PAS, PAB

Concerns: blowdown

Buffer (RMA): Class I for PAS and PAB greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens.

Alternatives: 2, 3, 4, and 5 Buffer (RAW): Will be identified by IDT during Layout.

Protection: Category A

Temporary roads for Unit 206: Alternatives 2, 3, 4, and 5 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

Unit

Number 206 Alternatives 2, 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 206

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. Forested wetlands are located throughout the unit. The soils and wetlands are suitable 

for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the 

small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding 

under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track 

slippage and rutting.

A temporary road will impact about 1/4 acre of forested wetland within the unit and less than 1/4 acre outside of the unit. 

Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, 

remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.
3000331

3000000

6.1R

6.2L

1

6.2R

10

1.10 R

45

20

1 1.1 R

6

1988

1992

1973

1972

1972

1973

1972

1992

1973

1987

1973

1973

202

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 206 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3000331

3000000

6.1R

6.2L

1

6.2R

10

1.10 R

45

20

1 1.1 R

6

1988

1992

1973

1972

1972

1973

1972

1992

1973

1987

1973

1973

202

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 206 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000331

3000000

6.1R

6.2L

1

6.2R

10

1.10 R

45

20

1 1.1 R

6

1988

1992

1973

1972

1972

1973

1972

1992

1973

1987

1973

1973

202

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 206 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3000331

3000000

6.1R

6.2L

1

6.2R

10

1.10 R

45

20

1 1.1 R

6

1988

1992

1973

1972

1972

1973

1972

1992

1973

1987

1973

1973

202

203

204

206

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 206 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 207

Total Unit

Acres:

12.4 Prescription: Clearcut

VCU

Number:

582 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

442

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 207 has old-growth stand structure with an overstory consisting of western hemlock and western 

redcedar. Sitka spruce and Alaska-cedar are secondary components. This is a mature stand with moderate to heavy areas 

of mistletoe, stem decay and breakage. Windthrow risk is high. All adjacent past harvest areas have regeneration at least 5 

feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to heavy levels of decay and defect resulting in a situation 

where stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for uphill cable yarding to landings on the proposed temporary road. Unit borders the Ratz roadless area.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1600 feet, as displayed on the unit card. Approximately 200 feet of 

this road will be constructed across decommissioned road bed. Reconstruction of existing NFS road 3030100, totaling 

12,000 feet, will be required to access this unit. This road also is used to access Units 464, 577, 578, 212, and 213.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait.

 

All streams in unit: Class: IV Flagging: G/W C- Type: HC

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C 

Temporary roads for Unit 153: Alternatives 2 and 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 207 Alternatives 2, 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 207

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No concerns, but unit is adjacent to the Ratz Roadless Area along southeast border.

 SOILS/WETLANDS:

Most slopes range from 35 to 55%. Intermittent areas of forested wetlands are located along the proposed road line. A 

minimum of partial suspension yarding would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

A temporary road will impact about 1 acre of forested wetland in the unit and about 1/2 acre outside of the unit. Wetland 

avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern 3/4 of unit). Loons observed in small lake to west. Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped because location is adjacent to the biologically preferred small OGR and to provide better 

connectivity with OGR to the northwest of unit.

Old-growth Reserve (OGR) Boundary

Alternatives 2: Current OGR boundary is not near unit. 

Alternative 3: OGR acres were added in a discrete piece north of existing small OGR in VCU 582, but to the south of unit.

Alterative 4: Unit dropped.

Alternative 5: Unit dropped.
3030100

3030100

1

9.6L

9 .1L

11

9.3L

9.4L

9.2R

12.1L

10

9.5R

9.1L.1R

9

8

12

9

9

9.1L

1969

1969

207

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 207 Alternative 2 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Partial Cut

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

582

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt2.mxd 14 July 2012

RR

SR
3030100

3030100

1

9.6L

9 .1L

11

9.3L

9.4L

9.2R

12.1L

10

9.5R

9.1L.1R

9

8

12

9

9

9.1L

1969

1969

207

578

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 207 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

582

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 212

Total Unit

Acres:

35.4 Prescription: 25% Removal

VCU

Number:

582 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

310

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 212 has old-growth stand structure. The overstory consists of western hemlock. Sitka spruce, 

western redcedar, Alaska-cedar and mountain hemlock are secondary species. Primary damages are stem decay and stem 

form (crooks, sweeps and splits). The average defect rating is moderate. Mistletoe was rated as low. Windthrow risk 

moderate. There are no adjacent harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Review the marking 

guides and silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for helicopter yarding to landings on the proposed temporary road accessing Unit 207. 

Alternative 5: Helicopter settings are planned for yarding to landings on the existing NFS road 3030112.

 ENGINEERING/ROADS:

Reconstruction of existing NFS road 3030100, totaling 12,000 feet, is used to provide access in Alternative 3. This road also 

is used to access Units 464, 577, 578, 207, and 213.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream 7.1L characteristics do not include project specific field verified information.

Stream#: 7 Class: III Flagging: O/W C- Type: AFH, HCD, 

Concerns: blowdown, steep side-slopes with exposed bedrock and loose soil

Buffer (RMA): Class III for AFH greater of 140 feet or active portion of the alluvial fan. Class III for HCD to the top of the sideslope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category B 

Stream#: 7.1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO, 

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed.

Protection: Category C

Unit

Number 212 Alternatives 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 212

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is in Middleground and has Low VAC, No concerns because of uneven-age management.

 RECREATION:

No Concerns, but unit is adjacent to the Ratz Roadless Area along its southwestern border.

 SOILS/WETLANDS:

Slopes range from 50 to greater than 72%. No wetlands were identified during field investigations. About 1⁄2 acre of slopes 

greater than 72% occur along the top of the unit. Full suspension and partial harvest is required on these steep slopes. 

About 1.5 acres were excluded due to colluvial activity on the soil surface, active and historic landslides, extremely steep 

slopes, wet steep slopes, and MMI4 soils. In the remaining unit, full suspension and partial harvest is required to meet soil 

and wetland concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern 1/2 of unit). Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternative 2: Unit dropped.

Alternative 3: OGR acreage added in an isolated piece north of the existing OGR, adjacent to north boundary of unit. 

Alterative 4: Adopts Interagency OGR adjacent to north boundary of unit.

Alternatives 5: Current OGR boundary not located near unit.
4.11R

7.1L

6

9.1 L

4.11R.1R

5.1L.1L

9.1L.1R

5.1L

5

8

4.2L

4

4.1L

4

9.1L

7

212

213

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 212 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

582

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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4.11R

7.1L

6

9.1 L

4.11R.1R

5.1L.1L

9.1L.1R

5.1L

5

8

4.2L

4

4.1L

4

9.1L

7

212

213

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 212 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

582

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Unit 213

Total Unit

Acres:

65.2 Prescription: 3, 5 - 50% 

Removal

5 - 25% Removal

VCU

Number:

582 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

689

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit has old-growth stand structure. The overstory consists primarily of western hemlock with Sitka 

spruce and western redcedar common. The dominant damage agents are stem decay, along with wind damage and 

mistletoe. The average defect rating for the unit as a whole is moderate. Mistletoe is present, but patchy and ranges from 

light to heavy ratings. Much of the area has high wind exposure, with some micro-sites having very high risk exposure. 

Repeated windthrow events are evident in the stand structure. Wind risk rating is high. There are no adjacent harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the eastern setting and 50 percent of the western setting pretreatment basal area uncut, 

based on standing live tree total for the unit. The western settings has generaly north exposure, and is expected to be less 

susceptible to windthrow than the eastern setting. Individual trees selected for harvest may occur in small groups but will 

generally be evenly distributed across the stand. Any small groups will usually be less than one acre but may occasionally go 

up to two acres in size where needed to address insect and disease issues or capitalize on existing advanced regeneration 

of desirable tree species. Trees selected for harvest will generally be well distributed and no large openings will occur as a 

result of the harvest. Review the marking guides and silvicultural prescription for more detailed information and direction 

regarding how to implement this prescription.

 TIMBER/LOGGING:

A portion of unit borders the Ratz roadless area. This unit has long yarding distances (approximately 10,000 feet)

Alternative 3: This unit is planned for helicopter yarding to landings on the proposed temporary road accessing Unit 207. 

Alternative 5: Helicopter settings are planned for yarding to landings on the existing NFS road 3025500.

 ENGINEERING/ROADS:

Reconstruction of existing NFS road 3030100, totaling 12,000 feet, is used to provide access in Alternative 3. This road also 

is used to access Units 464, 577, 578, 207, and 212.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream A1.1R characteristics do not contain project specific, field verified information. 

Stream #: A1.1R Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category B 

Stream #: 1 Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV none.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Unit

Number 213 Alternatives 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 213

Protection: Category A and C

Stream #: 2 Class: II , IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV none.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category A and C

Stream #: 3 Class: II , IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV none.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category A and C 

Stream #: 4 Class: II Flagging: B/W C- Type: HCM

Concerns: blowdown

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category A 

Stream #: 4.1L Class: II Flagging: B/W C- Type: HCO

Concerns: blowdown

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category A

Stream #: 4.2L Class: II, II Flagging: B/W, O/W C- Type: AFH

Concerns: blowdown

Buffer (RMA): Class II and III for AFH greater of 140 feet or the active portion of the alluvial fan.

Alternatives: 3 and 5 Buffer (RAW): no review needed.

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns because of uneven-age management.

 RECREATION:

No concerns, but unit is adjacent to the Ratz Roadless Area.

 SOILS/WETLANDS:

Slopes range from gentle to 90%. Forested wetlands are intermixed with uplands in the lower elevations of the unit. There is 

a small area of slopes greater than 72% that is suitable for harvest with full suspension. Most of the upper elevations of the 

unit are about 70% slopes and are suitable for harvest with full suspension. About 2 acres were excluded due to colluvial 

activity on the soil surface, active and historic landslides, extremely steep slopes, and MMI4 soils. A small landslide was 

identified during field investigations that is within the soil exclusion area. Full suspension yarding is required to meet soil and 

wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern 1/2 of unit). Legacy standard and guideline does not apply in this VCU.

Alternative 4: Dropped to maintain connectivity.

Old-growth Reserve (OGR) Boundary

Alternative 2: not in alternative

Alternative 3: OGR acres around southern end of unit relocated; OGR now adjacent to southeastern boudary of unit. 

Alterative 4: Adopts Interagency OGR (shifting boundary farther south); no unit under this alternative.
Unit 213

Alternatives 5: Current OGR boundary adjacent to southern end of unit.

Total Unit

Acres:

Prescription:

VCU

Number:

Harvest

System:

Net Harvest

Volume

(MBF):

0

LUD:

 SILVICULTURE:

 TIMBER/LOGGING:

 ENGINEERING/ROADS:

 BOTANY:

 FISHERIES:

 GEOLOGY/KARST:

 HERITAGE RESOURCES:

 SCENERY:

 RECREATION:

 SOILS/WETLANDS:

 WILDLIFE:

Unit

Number 300 Alternatives

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:
5.1L.1

2

3

1

4.2L

4

4.1L

4

A1

A1.2R

A1

A1.1R

212

213

463

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 213 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

582

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
5.1L.1

2

3

1

4.2L

4

4.1L

4

A1

A1.2R

A1

A1.1R

212

213

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 213 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

582

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Unit 360

Total Unit

Acres:

20.9 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

331

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: Unit 360 is predominantly a western hemlock stand that transitions to western hemlock and Alaska-cedar 

in the upper elevations. Old-growth stand structure dominates. Light to moderate windthrow, moderate defect, and a common 

incidence of mistletoe defines the health of the stand. All adjacent past harvest areas have regeneration at least 5 feet tall, 

meeting NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for a combination of helicopter, shovel, and cable yarding. Cable settings are planned for 

uphill and downhill yarding to landings on the proposed temporary roads. Shovel settings are planned for yarding to the 

proposed temporary roads. 

Alternative 5: This unit is planned for helicopter yarding. Helicopter settings are planned for yarding to the existing NFS road 

2000400.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternative 3, totaling 2200 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A15.1R Class: II Flagging: B/W C- Type: HCL, HCLw

Concerns: none known

Buffer (RMA): Class II for HCL and HCLw greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category A 

Stream#: A15.1R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A15.1R.1R.1R	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Unit

Number 360 Alternatives 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 360

Protection: Category B 

Stream#: A15.1R.2R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A15.1R.3R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A10.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category B

Temporary roads for Unit 360: Alternatives 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns. Unit is entirely in Very Low SIO.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 10 to 80 percent. Most slopes are between 25 and 50%. There are less than 1/2 acre of slopes over 

72% within the unit that are suitable for harvest. About 3 acres were excluded due to steep slopes, dissected slopes, and 

landslides. The remaining the soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All 

logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small nonforested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil 

moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

There is about 1/4 acre (0.4% of the unit) of emergent sedge/forested wetland complex along the southeastern edge of the 

unit (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western 1/3 of unit). Unit is located in an area of known wolf use near Control Lake. Legacy standard and guideline 

does not apply in this VCU.

Alternative 4: Unit dropped because majority of unit coincides with the biologically preferred small OGR.

Old-growth Reserve (OGR) Boundary

Alternative 2: Unit not in alternative

Alternatives 3: OGR shifted slightly further west of unit. 

Alternative 4: Adopts Interagency OGR which coincides with unit.

Alternative 5: Current OGR boundary near unit to the west.
2000400

2000440

1.1L.1

1.1L.10L.3R

A10

A14

1.1L.10L

A1

A10.1L

A15.1R.1R.1R

A15.1R

A15.1R.1R

A15.1R.22

A10

A10.1L.1L

A15.1R.3R

A9

A15

A8

A10.2L

2003

1991

2003

24

360

361

407

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 360 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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2000400

2000440

1.1L.1

1.1L.10L.3R

A10

A14

1.1L.10L

A1

A10.1L

A15.1R.1R.1R

A15.1R

A15.1R.1R

A15.1R.22

A10

A10.1L.1L

A15.1R.3R

A9

A15

A8

A10.2L

2003

1991

2003

24

360

361

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 360 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

595

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Unit 361

Total Unit

Acres:

3, 5 - 10.3

4 - 6.0

Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

3, 5 - 285

 4 - 166 LUD:

Modified Landscape,

Timber Production

 SILVICULTURE:

Existing Condtion: Unit 361 is predominantly a Sitka spruce stand that transitions to western hemlock on the northern 

slopes. Old-growth stand structure dominates. Moderate to high windthrow and past weather damage, moderate defect, and 

moderate mistletoe define the stand. This stand is over-mature with declining growth. All adjacent past harvest areas have 

regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 2000400.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A15.1R.3R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 4, and 5	 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A8 Class: II, III Flagging: B/W, O/W C- Type: HCDw, HCM

Concerns: none known

Buffer (RMA): Class II for HCDw and HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM to the 

top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category A and B 

Stream#: A9 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A10 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Unit

Number 361 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 361

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A10.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns. Unit consists of Low and Very Low SIOs.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

No wetlands have been mapped in the unit. About 5 acres are considered unsuitable due to steep slopes and were excluded 

from unit. GIS analysis indicates that most slopes are less than 65% in the remainider of unit. About 4 acres of steep slopes 

occur within the unit that are suitable with partial suspension requirements. In the remaining unit, a minimum of partial 

suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit) and is located in an area of known wolf use near Control Lake. 

Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternative 2: Unit not in alternative.

Alternative 3: OGR boundary shifted further west of unit.

Alterative 4: Adopts Interagency OGR shifting boundary to the east, OGR boundary is adjacent to west unit boundary

Alternative 5: Current OGR boundary near unit to the west.
2000440

2000440

2000400

2000440

A15

A15.1R.3R

A9

A15

A10.2L

A8

A10

A13

A12

A13.1L

A10.1L

1

A13

1.10 R

A15.1R.1R.1R

A14

A15.1R

A15.1R.1R

A15.1R.22

A10

A10 1. L.1L

2003

1991

2003

25

360

361

405 406

407

24

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 361 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
2000440

2000400

2000440

A13

A12

A13.1L

A10.1L

1

A13

1.10 R

A15.1R.1R.1R

A14

A15.1R

A15.1R.1R

A15.1R.22

A10

A10 1. L.1L

A15

A15.1R.3R

A9

A15

A10.2L

A8

A10

2003

1991

2003

24

25

361

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 361 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
2000440

2000400

2000440

A13

A12

A13.1L

A10.1L

1

A13

1.10 R

A15.1R.1R.1R

A14

A15.1R

A15.1R.1R

A15.1R.22

A10

A10 1. L.1L

A15

A15.1R.3R

A9

A15

A10.2L

A8

A10

2003

1991

2003

24

25

360

361

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 361 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 363

Total Unit

Acres:

100.5 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

3,453

LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: This unit consists of old-growth stand structure. The overstory is made up of unevenly-spaced, 

moderately stocked, mature western hemlock and western redcedar, with scattered Alaska-cedar and Sitka Spruce. 

Windthrow risk is moderate. Mistletoe in the stand is low overall. Damages and defects were rated as moderate. All adjacent 

past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered 

openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

Total size of unit slightly exceeds 100 acres (0.5 acre). The entire unit represents a logical block of timber and would be 

most efficient to harvest at one time, rather than deferring an acre of two for later and returning with equipment and redeveloping landings again in the future. Therefore the unit meets the criteria for exceeding 100 acres.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to existing NFS roads 3015000 and 3015600.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCD, HCM, HCD

Concerns: none known

Buffer (RMA): Class III for HCM and HCD to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A1.1L Class: III Flagging: O/W C- Type: HCM, HCD

Concerns: none known

Buffer (RMA): Class III for HCM and HCD to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A1.1L.1R Class: III, IV Flagging: O/W, G/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCM none.

Unit

Number 363 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

Two populations of common tansy located about 500 ft. west of the unit along roads 3015000 and 3015600. These locations 

should be treated and then monitored.
Unit 363

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

Stream#: A1.1L.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM 

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCM none.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C

Stream#: A1.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A1.3L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A1.4L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A2 Class: III, IV Flagging: O/W, GW C- Type: MMS, HCM

Concerns: none known

Buffer (RMA): Class III for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCM none.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

Stream#: A2.2R Class: III, IV Flagging: O/W, GW C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCM none.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

Stream#: A2.3R Class: III, IV Flagging: O/W, GW C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCM none.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A2.4L Class: III Flagging: O/W C- Type: HCL, HCD 

Concerns: none known

Buffer (RMA): Class III for HCL and HCD to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A2.5L Class: III, IV Flagging: O/W, G/W C- Type: HCL 

Concerns: none known

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCL none.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C

Stream#: A3 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3, 4, and 5 Buffer (RAW): no review needed 

Protection: Category B
Unit 363

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit consists of about 32 acres of Low and 68 acres of Very Low SIOs. Half or less of the unit may be visible from some 

locations in the Snakey Lakes area. No Concerns.

 RECREATION:

Unit is about 1 mile from the Scenic River LUD, but is not likely to be visible from any location except on the river, at a 

distance of about 1 1/2 miles or more. No Concerns

 SOILS/WETLANDS:

GIS analysis indicates that slopes range from nearly level up to about 90%, though no steep slopes are mapped within the 

unit. There is a historic landslide (pre-1971) in the north end of the unit. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

There are approximately 13 acres (13% of the unit) of forested wetland in the southeastern portion of the unit (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (along southern edge of unit). Unit is near the Honker large OGR complex. 

Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternative 2: Unit not in alternative.

Alternative 3: OGR boundary relocated north and further away from unit. 

Alteratives 4 and 5: Current OGR boundary near unit to the north and west.
3015600

3015000

A1.1L.1L

A1.4L

1.1R

A1.2L

A2.4L

A1.3L

A2.3R

A1.1L.1R

A2.2R

A2.5L

A1.1R

A1.1L

A4

A2.1R

A3.1L

A3.2L

A2

A1

A2.1R

A3

A1

A2.1L

1976

1988

1976

1988

1987

363

395

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 363 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3015000

3015600

A3.2L

A2

A1

A2.1R

A3

A1

A2.1L

A1.1L.1L

A1.4L

1.1R

A1.2L

A2.4L

A1.3L

A2.3R

A1.1L.1R

A2.2R

A2.5L

A1.1R

A1.1L

A4

A2.1R

A3.1L

1976

1988

1976

1988

1987

395

395

395

363

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 363 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3015000

3015600

A3.2L

A2

A1

A2.1R

A3

A1

A2.1L

A1.1L.1L

A1.4L

1.1R

A1.2L

A2.4L

A1.3L

A2.3R

A1.1L.1R

A2.2R

A2.5L

A1.1R

A1.1L

A4

A2.1R

A3.1L

1976

1988

1976

1988

1987

395

395

395

363

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 363 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

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Unit 365

Total Unit

Acres:

10.7 Prescription: Clearcut

VCU

Number:

579 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

221

LUD:

Timber Production

 SILVICULTURE:

Existing Condition: This unit consists of old-growth stand structure. Windthrow risk is low. Mistletoe was generally absent 

from the stand. Alaska cedar decline was evident with both past and recent mortality. The overstory is poorly-stocked, overmature, western hemlock and Sitka spruce with groups of dead Alaska-cedar and scattered western redcedar. Mountain 

hemlock is also common in the upper elevations. Heavy defects are present consisting of stem decay and weather 

associated cracks and seams. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with heavy levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the original planned unit is less than 20 acres, therefore no 

legacy set-aside is required.

 TIMBER/LOGGING:

Alternatives 3, 4: This unit is planned for shovel yarding to the proposed NFS road 3017100. 

Alternative 5: This unit is planned for helicopter yarding to landings on the existing NFS road 3017100.

 ENGINEERING/ROADS:

Unit is accessed by proposed extension of NFS road 3017100 in Alternatives 3 and 4, totaling 700 feet, as displayed on the 

unit card. See road card for detailed information on the proposed NFS road. Unit is also accessed by reconstruction of 

existing NFS road 3017100, totaling 2,200 feet. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams tributaries to Gravelly Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A2 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Unit

Number 365 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 365

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

No steep slopes are mapped in the unit. Slopes in about 2/3 of unit are below 35%. There is less than 1/4 acre (1% of the 

unit) of emergent sedge/forested wetland complex near the eastern edge of the unit (BMP 12.5). The soils and wetlands are 

suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 

13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 

25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (southern end of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because it is less than 20 acres.
3017170

3017100

3017100

3017200

2.1R

2

A2

A1

1971

1996

1966

1995

1995

120

365

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 365 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3017170

3017200

3017100

3017100

2.1R

2

A2

A1

1971

1996

1966

1995

1995

120

365

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 365 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3017170

3017200

3017100

2.1R

2

A2

A1

1971

1996

1966

1995

1995

120

365

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 365 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 368

Total Unit

Acres:

3 - 22.7

4, 5 - 22.3

Prescription: Clearcut

VCU

Number:

579 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

3 - 543

4, 5 - 535 LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condition: This unit has old-growth structure. Windthrow risk is moderate. Mistletoe occurrence in the stand is light. 

Alaska cedar decline is evident throughout the unit. The overstory is primarily mature western hemlock, with Alaska cedar 

common in the south and Sitka spruce occurring in the northernmost tip of the unit. The primary defects are stem decay and 

stem form defects. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with heavy stem decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 10 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG at north end of unit, expanding off the RMA and providing RAW. Also, it was placed to block up POG across the 

north-center of unit to divide opening into smaller openings and maintain east-west connectivity. Total mapped legacy is 

approximately 10 acres. Any adjustments to the planned unit during implementation must consider the planned acreage and 

location of legacy.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding 

to the proposed temporary road. Helicopter settings are planned for yarding to the existing NFS road 3017200. 

Alternatives 4, 5: This unit is planned for helicopter yarding to the existing NFS roads 3017200.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternative 3, totaling 1100 feet, as displayed on the unit card. This unit is 

also accessed by reconstruction of existing NFS road 3017200, totaling 11,800 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 368 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 368

Streams tributaries to Gravelly Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: 1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: 1.2L Class: III Flagging: O/W C- Type: HCV

Concerns: none known

Buffer (RMA): Class III for HCV to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: Lake A2 Class: III Flagging: O/W C- Type: L

Concerns: none known

Buffer (RMA): Class III for Lake-A2 none. 

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed

Protection: Category B 

Temporary roads for Unit 368: Alternative 3 -- One Class IV stream crossing. The temporary roads have not been field 

verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.16, 13.10, 13.11, 13.17, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes generally range from about 20% to about 50%. No slopes over 72% have been mapped in the unit. Approximately 

1/4 of the unit is forested wetland. The soils and wetlands are suitable for a minimum partial suspension yarding or shovel 

yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small 

non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under 

some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage 

and rutting.

Alternative 3: A temporary road will impact about 2 acres of forested wetland in the unit and about 1 acre outside of the unit. 

Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, 

remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; positioning of 

Legacy acres covers some deer winter range.

Alternatives 4 and 5: All helicopter yarding to minimize road building and associated impacts to wildlife due to increased 

access.
3017300

3017200

3017210

1.1L

3

LAKE A1

4

2

LAKE A2

5

A2

1.2L

A1

A3

1

A10

1995

1993

1963

1971

368

369

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 368 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3017200

3017300

3017210

1.1L

3

LAKE A1

4

2

LAKE A2

5

A2

1.2L

A1

A3

1

A10

1995

1993

1963

1971

368

369

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 368 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3017200

3017300

3017210

1.1L

3

LAKE A1

4

2

LAKE A2

5

A2

1.2L

A1

A3

1

A10

1995

1993

1963

1971

368

369

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 368 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 369

Total Unit

Acres:

3 - 15.1

4, 5 - 15.4

Prescription: Clearcut

VCU

Number:

579 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

3 - 392

4, 5 - 399 LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 369 has old-growth stand structure comprised of mature western hemlock, western redcedar, Alaskacedar and scattered Sitka spruce. Windthrow risk is moderate. Mistletoe occurrence is moderate. Stem decay is moderate. 

All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 7 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. In Alternative 3 legacy was 

placed to block up POG at the south and east sides of unit and adjacent to RMA in center and to shorten required roads. In 

Alternatives 4 and 5 legacy was placed to block up POG at south end of unit and in middle of unit and to divide unit into two 

openings. Total mapped legacy is approximately 7 acres. Any adjustments to the planned unit during implementation must 

consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for a combination of cable and shovel yarding. Shovel settings are planned for yarding to 

the proposed temporary road. Cable settings are planned for uphill yarding to landings on the proposed temporary road. 

Alternatives 4, 5: This unit is planned for helicopter yarding to landings on the existing NFS roads 3017200 and 3017210.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternative 3, totaling 2,000 feet, as displayed on the unit card. This unit is 

also accessed by reconstruction of existing NFS road 3017200, totaling 11,600 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 369 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 369

 FISHERIES:

Streams tributaries to Gravelly Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A3 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A2 Class: III, IV Flagging: O/W, GW C- Type: HCD, HCM

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCM none.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B and C 

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B 

Temporary roads for Unit 369: Alternative 3 -- One Class III and one Class IV stream crossings. The temporary roads have 

not been field verified and will be surveyed before implementation. Crossings structures and locations will be approved by 

USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of 

temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 10 to 50%. The soils and wetlands are suitable for full or partial suspension yarding or shovel yarding. 

Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel yarding 

under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track 

slippage and rutting. 

Alternative 3: A temporary road will impact about 1 acre of forested wetland within the unit and an additional 1 acre outside 

the unit. Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross 

drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; positioning of 

Legacy acres covers some deer winter range. 

Alternatives 4 and 5: Helicopter yarding of entire unit will minimize road building and associated effects to wildlife due to 

increased access.
3017300 3017000

3017000

3017350

3017000

3017210

3017200

2

3

4

LAKE A2

5

1.2L

A1

A10

A3

A2

A1

1995

1973

1963

1971

368

369

525

527

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 369 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3017300

3017200

3017000

3017000

3017200

3017350

3017200

3017000

3017210

2

3

4

LAKE A2

5

1.2L

A1

A10

A3

A2

A1

1995

1973

1963

1971

368

369

525

527

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 369 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3017300

3017200

3017000

3017000

3017200

3017350

3017200

3017210

2

3

4

LAKE A2

5

1.2L

A1

A10

A3

A2

A1

1995

1973

1963

1971

368

369

525

528

529

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 369 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 370

Total Unit

Acres:

3 - 20.6

4, 5 - 21.8

Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

3 - 709

4, 5 - 751 LUD:

Modified Landscape, 

Timber Production

 SILVICULTURE:

Existing Condtion: This unit has old-growth stand structure in the southern half that transitions to even-age appearing 

understory re-initiation structure as you move up in elevation and to the north. The overstory consists of western hemlock, 

western redcedar, Alaska-cedar and Sitka spruce. The even-age area has a strong component of Sitka spruce due to the 

past disturbance. The even-age portion of the stand is approximately 150 years old and meets culmination requirements. 

The old growth area has moderate damage and defect. Windthrow risk is high. Mistletoe is light. All adjacent past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate stem decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 7 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. In Alternative 3 legacy was 

placed to block up POG at north end of unit and on west side of unit (adjacent to RMA) and to shorten required roads. In 

Alternatives 4 and 5 legacy was placed to block up POG at north end of unit and in middle of unit and to divide unit into three 

openings. Total mapped legacy is approximately 9 acres in Alternative 3 and 7 acres in Alternatives 4 and 5. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill yarding 

to landings on the proposed temporary roads. Shovel settings are planned for yarding to the proposed temporary roads. 

Alternatives 4, 5: This unit is planned for helicopter yarding to landings on the existing NFS road 2030952.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary roads in Alternative 3, totaling 3100 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 370 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 370

 FISHERIES:

Streams drain to Thorne Bay. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category B

Temporary roads for Unit 370: Alternative 3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns. Units mostly in Low SIO, with 3 acres of Moderate, but majority of unit is well screened from VPRs along the 

Thorne River and saltwater areas.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15% to about 65%. The soils and wetlands are suitable for a minimum partial suspension yarding or 

shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable 

for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% 

gradient. Avoid track slippage and rutting.

No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (western half of unit), all of which is also deep snow marten habitat/deer winter 

range. Legacy standard and guideline applies in VCU 5860; positioning of Legacy acres covers some deer winter range.

Alternatives 4 and 5: Helicopter yarding to minimize road building and associated effects to wildlife.
RR

2030960

2030952

KASAAN ROAD

2030952

KASAAN ROAD

A3

A5

A5.1L

A5

A5.1R

A 5

A5.2R

A7

A6

A4

1962

1962

1990

1990

1997

1997 1990

1990

1976

370

516

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 370 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586,598

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
RR

2030960

2030952

KASAAN ROAD

2030952

KASAAN ROAD

A3

A5

A5.1L

A5

A5.1R

A 5

A5.2R

A7

A6

A4

1962

1962

1990

1990

1997

1997 1990

1990

1976

370

370

516

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 370 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586,598

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
RR

2030960

2030952

KASAAN ROAD

2030952

KASAAN ROAD

A3

A5

A5.1L

A5

A5.1R

A 5

A5.2R

A7

A6

A4

1962

1962

1990

1990

1997

1997 1990

1990

1976

370

370

516

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 370 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586,598

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

SR
Unit 371

Total Unit

Acres:

18.8 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

551

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: Unit 371 has old-growth stand structure across the majority of the acreage. There are areas with patchy 

two-age structure resulting from older windthrow. The overstory of the unit consists of western hemlock, western redcedar 

and scattered Sitka spruce. Alaska cedar is present where the stand transitions into non-commercial timber along the 

southern boundary. The overstory has moderate damage and defect. Mistletoe is present but light. Windthrow risk is high. 

All nearby past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for uphill and downill cable yarding to landings on the proposed temporary road and existing NFS road 

2030798.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 700 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are Tributaries to Setter Lake and Thorne Bay. Stream characteristics do not include project-specific, field-verified, 

information.

 

Stream#: 1 Class: II Flagging: B/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A

Stream#: 1.1L Class: II Flagging: B/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A

Stream#: A1	 Class: II Flagging: B/W C- Type: HCLw

Concerns: none known

Unit

Number 371 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 371

Buffer (RMA): Class II for HCLw greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 4, and 5 Buffer (RAW): no review needed 

Protection: Category A 

Temporary roads for Unit 371: Alternatives 3, 4 and 5 -- No known stream crossings. The temporary roads have not been 

field verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and 

locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). 

During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 30 to 50%. About 2 acres of slopes greater than 72% are mapped in the unit. The soils and wetlands are 

suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 

13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 

25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

There is a small area (less than 1/4 acre) of moss muskeg near the eastern unit boundary (BMP 12.5).

A temporary road will impact less than 1/4 acre of moss muskeg within the unit and less than 1/4 acre outside the unit. 

Wetland avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, 

remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern and southern ends of unit). Legacy standard and guideline applies in this VCU, however there are no 

requirements for this unit because it is less than 20 acres.
KASAAN ROAD

2030798

1 .1 L

1

A1.1L

A1

1962

1997

1962

1962

1997

371

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 371 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
KASAAN ROAD

2030798

1 .1 L

1

A1.1L

A1

1962

1997

1962

1962

1997

371

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 371 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
KASAAN ROAD

2030798

1 .1 L

1

A1.1L

A1

1962

1997

1962

1962

1997

371

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 371 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 372

Total Unit

Acres:

15.5 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

236

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This area consists of old-growth timber. Windthrow risk is high. Mistletoe is light. The overstory is mature 

western hemlock, western redcedar and Sitka spruce. Damages are considered moderate across the stand. All nearby past 

harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

Alternative 3: This unit is planned for shovel yarding to the proposed temporary roads. 

Alternative 5: This unit is planned for helicopter yarding to the existing NFS road 3000200.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads in Alternative 3, totaling 700 feet, as displayed on the unit card. This unit 

is also accessed by reconstruction of existing NFS road 3000215, totaling 1200 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 1 Class: I Flagging: B/W C- Type: MCM

Concerns: blowdown, bank erosion

Buffer (RMA): Class I for MCM greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 and 5 Buffer (RAW): no review needed 

Protection: Category A 

Stream#: 1.2R Class: II Flagging: B/W C- Type: HCO

Concerns: blowdown observed

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Temporary roads for Unit 372: Alternatives 3 -- No known stream crossings. The temporary roads have not been field 

verified and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations 

Unit

Number 372 Alternatives 3, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 372

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mostly Low SIO and is mostly screened from NFS Road 3000000, which is at a distance of more than 1/2 mile. No 

concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15 to 30%. Most of the southern half of the unit is forested wetland (BMP 12.5). The soils and 

wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 

12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. 

Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

The proposed temporary road in Alternative 3 would not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern half of unit). Legacy standard and guideline applies in this VCU, however there are no requirements for this 

unit because it is less than 20 acres.

Alternative 4: Unit dropped to maintain connectivity, deer winter range, and marten habitat.
3000190

3000200

3000191

3000215

3000190

3000200

3000215

3000210

1.2R.1L

1

1.1L

5.1R

1.1R

1

1.1L

1.2L

1.1L.1L

1.1L.3L

5.1R.2L

1.2R

1.1L.1R

5.1R.3R

1.2R

1.1L.2L

1992

1966

1997

1974

1966

1968

1992

1966

145

146

148 147

372

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 372 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3000190

3000215

3000190

3000200

3000200

3000191

3000210

1.2R

1.1L.2L

1.2R.1L

1

1.1L

5.1R

1.1R

1

1.1L

1.2L

1.1L.1L

1.1L.3L

5.1R.2L

1.2R

1.1L.1R

5.1R.3R

1992

1966

1966

1997

1974

1966

1992

1968

145

146

148 147 146

372

143

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 372 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

RR

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Unit 380

Total Unit

Acres:

35.0 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

1,395

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This area consists of old-growth that is comprised of mature western hemlock, western redcedar and 

Sitka spruce with scattered Alaska-cedar in the northwest. Windthrow risk is high. Mistletoe was practically absent in the 

stand. There is moderate stem form defect and stem decay. All adjacent past harvest areas have regeneration at least 5 feet 

tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

Legacy is not required in this VCU.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill yarding to landings on the proposed temporary road and existing NFS road 

3016000.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road in Alternative 3, totaling 3,400 feet, as displayed on the unit card. 

Approximately 500 feet of this road will be constructed across decommissioned road bed. This road is also used to access 

Units 381 and 382. This route has not been field verified and may require adjustements to its location to allow operational 

feasibility.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A3 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A3.1R	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A2 Class: III Flagging: O/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class III HCL to the top of the side-slope break.

Unit

Number 380 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 380

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Temporary roads for Unit 380: Alternative 3 -- One Class III stream crossing. The temporary road had not been field verified 

and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation 

with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely in Low SIO and is partially visible from portions of the lakes along the Honker Divide trail at a distance of about 

1 1/4 miles or more. Typical opening sizes described in the Forest Plan for Low SIO areas are 15 to 40 acres for Low VAC 

and 40 to 60 acres for Intermediate VAC. The area is mostly Low with some Intermediate VAC so unit is expected to meet 

the SIO. If Units 380, 381, and 382 are to be harvested together, visible opening size is estimated at 40 acres or less and 

the combination still appears to meet the SIO.

 RECREATION:

Unit is about 3/4 mile outside of the Scenic River corridor. It is partially visible from some portions of the lakes along the 

Honker Divide trail in the center of the Scenic River corridor, at a distance of about 1 1/4 miles or more. The northeastern 

boundary of the unit coincides with the boundary of the Thorne River inverntoried roadless area, which also occurs about 1/4 

mile southwest of the unit.

 SOILS/WETLANDS:

Slopes range from about 40% to greater than 72%. About 2 acres were excluded due to very steep slopes. About 8 acres of 

slopes greater than 72% that are suitable for partial suspension yarding remain in the unit. A minimum of partial suspension 

yarding would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

Approximately 20% of the unit is forested wetland - mostly in the southern portion of the unit (BMP 12.5).

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is adjacent to the Honker large OGR complex (OGR to the 

south). Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
3016000

A2

A3

A3.1 R

A4

A1

1991

1991

1991

1991

380

381

382

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 380 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 381

Total Unit

Acres:

46.2 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

1,442

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is old-growth timber comprised mostly of western hemlock and Alaska-cedar. Windthrow risk is 

moderate to high throughout the stand with some evidence of older blowdown in the central to southeast portion of the unit 

and more recent blowdown along past harvest edges. Mistletoe was on average moderate throughout the stand. Primary 

defect is stem decay and form defects. Alaska-cedar decline was also evident in the southeastern corner. All adjacent past 

harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, and cable yarding. Shovel settings are planned for yarding to the proposed 

temporary road and existing NFS road 3016000. Cable settings are planned for uphill and downhill yarding to landings on the 

proposed temporary road. 

A portion of the unit on the west side of the road is adjacent to the Honker OGR boundary.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road, totaling 2,900 feet, as displayed on the unit card. Approximately 500 feet of 

this road will be constructed across decommissioned road bed. Part of this road is also used to access Unit 380 and 382. 

This route has not been field verified and may require adjustements to its location to allow operation feasibility.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A5 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A4 Class: III Flagging: O/W C- Type: MMS, HCV

Unit

Number 381 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 381

Concerns: none known

Buffer (RMA): Class III for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III HCV to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B 

Temporary roads for Unit 381: Alternative 3 -- Two Class III stream crossings. The temporary roads had not been field 

verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 37 acres of Low SIO and 9 acres of Very Low. It is partially visible from portions of the lakes along the Honker 

Divide trail at a distance of about 1 1/4 miles or more. Approximate opening sizes described in the Forest Plan for Low SIO 

areas are 15 to 40 acres for Low VAC and 60 to 100 acres for High VAC. About half the unit is Low and half is High. If Units 

380, 381, and 382 are to be harvested together, visible opening size is estimated at 40 acres or less and the combination still 

appears to meet the SIO.

 RECREATION:

Unit is about 3/4 mile outside of the Scenic River corridor. It is partially visible from some portions of the lakes along the 

Honker Divide trail in the center of the Scenic River corridor, at a distance of about 1 1/4 miles or more. A portion of the 

northeastern boundary of unit is within about 50 ft of the Thorne River inventoried roadless area boundary.

 SOILS/WETLANDS:

Slopes range from about 20 to over 72%. About 4 acres of slopes greater than 72% are mapped in the unit that are suitable 

for harvest with partial suspension. There are approximately 8 acres of forested wetland in the northern portion of the unit 

(BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging 

systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas 

of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture 

conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1/2 acre of forested wetland in the unit. Wetland avoidance was not practicable due to 

the abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the road after harvest 

(BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is adjacent to the Honker large OGR (OGR to the west). 

Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
3016000

A4

A2

A5

A6

A4

A1

1991

1991

1991

1991

1991

380

381

382

383

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 381 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 382

Total Unit

Acres:

9.8 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

364

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 382 is a mixed species stand of old-growth timber. Windthrow risk is moderate throughout the 

stand with no significant evidence of blowdown. Mistletoe is light. The overstory is made up of mature western hemlock, 

western redcedar, Alaska-cedar, and Sitka spruce. Damage and defects are moderate. All adjacent past harvest areas have 

regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road in Alternative 3, totaling 3,300 feet, as displayed on the unit card. 

Approximately 500 feet of this road will be constructed across decommissioned road bed. Part of this road is also used to 

access Units 380 and 381. This route has not been field verified and may require adjustements to its location to allow 

operation feasibility.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A4 Class: III Flagging: O/W C- Type: MMS, HCV

Concerns: none known

Buffer (RMA): Class III for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III HCV to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B 

Stream#: A6 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B 

Temporary roads for Unit 382: Alternative 3 -- One Class III stream crossing. The temporary road had not been field verified 

and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation 

with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

Unit

Number 382 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 382

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is 2/3 in Low SIO and 1/3 in Very Low. Unit is small and does not appear to be visible from the Honker Divide trail 

because of topographic and vegetation screening. If Units 380, 381, and 382 are to be harvested together, visible opening 

size is estimated at 40 acres or less and the combination still appears to meet the SIO.

 RECREATION:

The Thorne River inventoried roadless area borders the unit on its northeastern boundary.

 SOILS/WETLANDS:

Slopes range from about 25% to about 40%. The majority of the unit is covered by forested wetland (BMP 12.5). The soils 

and wetlands are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting. 

A temporary road will impact about 3/4 acre of forested wetland in the unit and about 1/4 acre outside the unit. ). Wetland 

avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is near Honker Large OGR complex. Legacy standard and 

guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
3016000

A4.1L.1R.1

A4.1L.2R

L

.1R

A4.1L.1R

A5

A4

A1

A4

A6

1991

1991

1991

380

381

382

383

384

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 382 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 383

Total Unit

Acres:

16.0 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

460

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 383 is predominantly a western hemlock old-growth stand. Western redcedar occurs to the west of 

the road. Moderate windthrow, moderate defect, and low evidence of mistletoe define the stand. All nearby past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 3016000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A4 Class: III Flagging: O/W C- Type: MMS

Concerns: none knonw

Buffer (RMA): Class III for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Stream#: A4.1L Class: III Flagging: O/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class III HCL to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B

Stream#: A4.1L.1R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Stream#: A6 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Unit

Number 383 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 383

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely in Very Low SIO. Unit is small and would not be visible from the Honker Divide trail because of topographic 

and vegetation screening.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20% to 30%. About half of the unit (mostly in the northern portion) is covered by forested wetland 

(BMP 12.5). The soils and wetlands are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. 

Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (nearly entire unit), some of which is also deep snow marten habitat/deer 

winter range (western lobe of unit). Unit is adjacent to the Honker large OGR (OGR boundary to the west). Legacy standard 

and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
3016000

A5

A4.1L.1R.1L

A4.1L

A4.1L.1R

A4.1L.2R.1R

A4

A4

A4.1L.3R

A4.1L.2R

A6

1991

1991

381

382

383

384

386

387

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 383 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 384

Total Unit

Acres:

17.1 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

564

LUD:

Modified Landscape

 SILVICULTURE:

Existing Condition: This unit is predominantly a western hemlock and western redcedar stand with old-growth stand 

structure. The timber is over-mature with declining growth. Moderate windthrow, moderate defect, and low evidence of 

mistletoe define the health of the stand. All nearby past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 3016000 and proposed temporary road.

A portion of the unit on the west side of the road is adjacent to the Honker OGR boundary.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road in Alternative 3, totaling 1,700 feet, as displayed on the unit card. This road is 

also used to access Unit 386.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River (Stream characteristics do not include project-specific, field-verified, information).

Stream#: A4.1L Class: III Flagging: O/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class III HCL to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Stream#: A4.1L.2R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B

Stream#: A4.1L.2R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Unit

Number 384 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 384

Stream#: A4.1L.1R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Stream#: A4.1L.1R.1L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout.

Protection: Category B 

Temporary roads for Unit 384: Alternative 3 -- One Class III stream crossing. The temporary road had not been field verified 

and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation 

with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is approximately 60% in Very Low and 40% in Low SIO and is not visible or only slightly visible from portions of the lakes 

along the Honker Divide trail at a distance of about 1 1/4 miles or more. It is not likely to be visible from the Honker Divide 

trail because of topographic and vegetation screening. Typical opening sizes described in the Forest Plan for Low SIO areas 

with Intermediate VAC are 40 to 60 acres and 60 to 100 acres for High VAC. This unit has a combination of Intermediate 

and High VAC. Total visible size of the opening created by Units 383, 384, 386, and 387 is estimated to be less than 25 

acres. No other units are considered part of the same opening, because Unit 383 is mostly not seen and does not connect 

with Unit 382 to the south and Unit 387 is long and linear and connects to Unit 394 to the north, but is considered not seen.

 RECREATION:

Unit is about 3/4 mile outside of the Scenic River corridor. It is not likely to be visible from the corridor or the Honker Divide 

trail due to topographic and vegetation screening. A portion of the eastern boundary of the unit is adjacent to the Thorne 

River inventoried roadless area.

 SOILS/WETLANDS:

Slopes range from about 15% to about 35%. The majority of the unit is forested wetland (BMP 12.5). The soils and wetlands 

are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not 

be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1/2 acre of forested wetland in the unit and less than 1/4 acre outside of the unit. Wetland 

avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western half of unit). Unit is adjacent to the Honker large OGR (OGR boundary to the west). Legacy standard and 

guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
LAKE A1

3016000

3016400

A4.1L.1R.1L

A4.1L

A4.1L.1R

A4.1L.2R.1R

A4

A4.1L.2R

A4.1L.3R

A6

1992

1991

1991

382

383

384

386

387

394

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 384 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 386

Total Unit

Acres:

28.7 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

873

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 386 is predominantly a western hemlock and western redcedar stand that transitions to pure 

western Hemlock in the southeast. Generally old-growth stand structure dominates. Moderate windthrow, moderate to high 

stem decay and a low instance of physical defects was observed. Mistletoe was rated low. The timber is over-mature and 

shows signs of declining growth. There are no adjacent past harvest units. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road and existing NFS road 3016000.

A portion of the unit on the west side of the road is adjacent to the Honker OGR boundary.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary road in Alternative 3, totaling 900 feet, as displayed on the unit card. This road is 

also used to access Unit 384.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A4.1L.2R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A

Stream#: A4.1L.3R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3	 Buffer (RAW): no review needed 

Protection: Category A

Temporary roads for Unit 386: Alternative 3 -- One Class III stream crossing. The temporary road had not been field verified 

and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation 

with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

Unit

Number 386 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 386

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is about 70% in Low SIO and 30% in Very Low SIO and may be partially visible from portions of the lakes along the 

Honker Divide trail at a distance of about 1 3/4 miles or more. Typical opening sizes described in the Forest Plan for Low 

SIO areas with Intermediate VAC are 40 to 60 acres and 60 to 100 acres for High VAC. This unit has a combination of 

Intermediate and High VAC. Total visible size of the opening created by Units 383, 384, 386, and 387 is estimated to be less 

than 25 acres. No other units are considered part of the same opening, because Unit 383 is mostly not seen and does not 

connect with Unit 382 to the south and Unit 387 is long and linear and connects to Unit 394 to the north, but is considered not 

seen.

 RECREATION:

Unit is about 3/4 mile outside of the Scenic River corridor. It is only partially visible (at most) from the corridor or the Honker 

Divide trail due to topographic and vegetation screening. Eastern and northeastern boundary of unit is adjacent to the 

Thorne River inventoried roadless area.

 SOILS/WETLANDS:

Slopes range from about 20% to about 35%. About half of the unit (western half) is forested wetland (BMP 12.5). The soils 

and wetlands are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting. 

A temporary road will impact about 1 acre of forested wetland in the unit. Wetland avoidance was not practicable due to the 

abundance of forested wetland. Provide adequate cross drainage, remove structures, and close the road after harvest (BMP 

14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is adjacent to the Honker large OGR (OGR boundary to the 

west). Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
LAKE A1

3016000

3016400

A4.1L.1R.1L

A4.1L

A6

A4

A4.1L.1R

A4.1L.2R.1R

A6

A4.1L.2R

A4.1L.3R

1992

1991

382

383

384

386

387

394

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 386 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 387

Total Unit

Acres:

7.7 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

139

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 387 is a low volume western hemlock / Alaska-cedar old growth stand. Moderate windthrow, 

moderate defect, and a moderate occurrence of mistletoe were observed. Timber values are poor in the unit however access 

and logging costs would be minimal due to the close proximity to the road. The timber is over-mature with declining growth. 

There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS roads 3016000 and 3016400.

 ENGINEERING/ROADS:

This unit will utilize part of reconstructed NFS road 3016400, totaling 800 feet. See road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A6 Class: I Flagging: B/W C- Type: MMS, MCS

Concerns: none

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for MCS greater of 100 feet or the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A 

Stream#: A4.1L.3R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit

Number 387 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 387

Unit is entirely in Low SIO and does not appear to be visible from the lakes along the Honker Divide trail due to topographic 

and vegetative screening. Approximate opening sizes described in the Forest Plan for Low SIO areas with Intermediate VAC 

are 40 to 60 acres. Total visible size of the opening created by Units 383, 384, 386, and 387 is estimated to be less than 25 

acres. No other units are considered part of the same opening, because Unit 383 is mostly not seen and does not connect 

with Unit 382 to the south and Unit 387 is long and linear and connects to Unit 394 to the north, but is considered not seen.

 RECREATION:

Unit is over 1 mile outside of the Scenic River corridor and is not likely to be visible from the corridor or the Honker Divide trail 

due to topographic and vegetation screening.

 SOILS/WETLANDS:

Slopes range from about 15% to about 50%. Approximately half of the unit is forested wetland (BMP 12.5). The soils and 

wetlands are suitable for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient 

may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on 

slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is adjacent to the Honker large OGR. Legacy standard and 

guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
LAKE A1

3016000

3016450

3016400

A4.1 L

A4.1L.1R.1L

A4.1L.1R

A4.1L.2R.1R

A4.1L.2R

A4.1L.3R

A6

1992

1992

1992

1991 383

384

386

387

394

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 387 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 392

Total Unit

Acres:

16.7 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

435

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 392 is an old-growth western hemlock and western redcedar stand with Sitka spruce with Alaskacedar only present in the north. Windthrow risk is moderate throughout the stand, with a few small windthrow patches found 

low on the slope in the northwest corner. Mistletoe was light in the eastern portion but heavy in the western lower elevations. 

The primary defect in the overstory is stem decay and wind damage. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

Unit is planned for uphill and downhill cable yarding to landings on the proposed temporary road.

A portion of the unit on the north boundary is adjacent to the Honker OGR boundary.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1,600 feet, as displayed on the unit card. Approximately 400 feet of 

this road will be constructed across decommissioned road bed. Unit is also accessed by reconstruction of NFS road 

3016400, totaling 5,300 feet. See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: AFM, HCD

Concerns: none

Buffer (RMA): Class III AFM greater of 140 feet or active portion of the alluvial fan. Class III HCD to the top of the side-slope 

break.

Alternatives: 3	 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A1.1L Class: III Flagging: O/W C- Type: HCL

Concerns: none

Buffer (RMA): Class III HCL to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 392 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 392

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is about 98% in Very Low SIO and may be partially visible (estimated to be up to 10 acres) from a few locations on the 

lakes along the Honker Divide trail at a distance of about 2 miles. Typical opening sizes described in the Forest Plan for 

Very Low SIO areas with Low VAC are 40 to 60 acres, so no concerns.

 RECREATION:

Unit is over 1 mile outside of the Scenic River corridor and is not likely to be visible from the corridor or the Honker Divide trail 

due to topographic and vegetation screening. The norhern boundary is adjacent to the Thorne River inventoried roadless 

area.

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. There are about 3 acres of slopes greater than 72% that are suitable for 

harvest with partial suspension requirements. There are approximately 3 acres of forested wetland along the eastern edge of 

the unit (BMP 12.5). A minimum of partial suspension yarding would meet soil and wetland resource concerns (BMPs 12.5, 

13.5, and 13.9).

A temporary road will impact about 1/2 acre of forested wetland within the unit and 1/2 acre outside the unit. Wetland 

avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (central portion of unit). Unit is near the Honker large OGR. Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
3016400

3016400

A6

A1

A1.1L

1992

1992

1992

1992

1992

1992

392

394

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 392 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 394

Total Unit

Acres:

28.2 Prescription: Clearcut

VCU

Number:

575 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

752

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 394 is predominantly a western hemlock / western redcedar stand with Alaska-cedar and Sitka 

Spruce present as lesser components. Generally old-growth stand structure dominates, however areas with patchy past wind 

damage throughout the south have a somewhat two-age structure. Moderate to high windthrow was noted. High defect 

occurs west of the road but defect is moderate east of the road. There is low evidence of mistletoe throughout the stand. The 

past harvest area adjacent to the north boundary has regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered an opening.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

Unit is planned for a combination of shovel and cable yarding. Shovel settings are planned for yarding to the existing NFS 

road 3016400. Cable settings are planned for downhill yarding to landings on the proposed NFS road 3016450.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3016450, totaling 700 feet. See corresponding road card for detailed information. 

Unit is also accessed by reconstruction of existing NFS road 3016400, totaling 2700 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A6 Class: I Flagging: B/W C- Type: MMS, MCS

Concerns: none

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for MCS greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A

Stream#: A4.1L.3R Class: III Flagging: O/W C- Type: HCL, HCM

Concerns: none

Buffer (RMA): Class III HCL and HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 394 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 394

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is 70% in Low SIO and 30% in Very Low. It may be partially visible (estimated to be up to 15 acres) from portions of the 

lakes along the Honker Divide trail at a distance of about 1 1/4 miles or more. Typical opening sizes described in the Forest 

Plan for Low SIO areas with Low VAC are 15 to 40 acres, so no concerns.

 RECREATION:

Unit is over 1 mile outside of the Scenic River corridor and may be only slightly visible from the corridor or the Honker Divide 

trail due to topographic and vegetation screening.

 SOILS/WETLANDS:

Slopes range from about 20% to greater than 72%. There are about 2 acres of slopes greater than 72% that are suitable for 

harvest with partial suspension requirements. About 1/4 of the unit in the western lobe and eastern edge is forested wetland 

(BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging 

systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas 

of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture 

conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is near the Honker large OGR (OGR boundary to the west). 

Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped to maintain connectivity and integrity of forest on fringes of Honker large OGR.
LAKE A1

3016000

3016450

3016400

A4.1L.2R

A4.1L.3R

A6

1992 1992

1992

1992

386

387

394

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 394 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

575

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 395

Total Unit

Acres:

19.2 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

550

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This area consists of old-growth structure that is comprised mostly of western hemlock and western 

redcedar with scattered Sitka spruce and Alaska-cedar. Many of the Alaska-cedar are dead. Defect is average for the timber 

type. The primary defect in the overstory is stem decay. Windthrow risk is moderate throughout the stand. Mistletoe infection 

was variable across the stand. Heavy infection occurs in the southern portion in the higher volume classes. All adjacent past 

harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3015000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River (Stream characteristics do not include project-specific, field-verified, information).

Stream#: A4 Class: III Flagging: O/W C- Type: HCD

Concerns: none known 

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A4.1L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A4.3L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A4.4L	 Class: III Flagging: O/W C- Type: HCM

Unit

Number 395 Alternatives 3, 4, 5

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 395

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A4.5L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A4.5L.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A4.6L Class: III Flagging: O/W C- Type: HCM, HCMw

Concerns: none known

Buffer (RMA): Class III for HCM and HCMw to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A3 Class: I, III Flagging: B/W, O/W C- Type: AFM, HCD, HCM

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. Class III for HCD and HCM to the top of 

the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B 

Stream#: A3.1R	 Class: III Flagging: O/W C- Type: HCD, HCM

Concerns: none known

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A3.1L	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A2.1R	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B

Stream#: A2.1L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A1 Class: I, III Flagging: O/W C- Type: HCD, HCM

Concerns: none known

Buffer (RMA): Class I for HCD greater of 100 feet or to the top of the side-slope break. 

Class III for HCM to the top of the side-slope break.

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category A and B

Stream#: A1.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.
Unit 395

Alternatives: 3, 4 and 5 Buffer (RAW): no review needed 

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is entirely in Low SIO and may be partially visible from the Snakey Lakes area at a distance of about 1 mile or more. 

Approximate opening sizes described in the Forest Plan for Low SIO areas with Low VAC are 15 to 40 acres.

 RECREATION:

Unit is less than 1 mile from the Scenic River LUD, near Snakey Lakes, but is not likely visible, except possibly from the 

lakes at a distance of 1 mile or more.

 SOILS/WETLANDS:

About 45 acres were excluded due to extremely steep and wet slopes and debris torrents/avalanches. In the remainder of the 

unit, slopes average from about 20% to about 70%. About 1/3 of unit is covered by forested wetland (northern portion) (BMP 

12.5). A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit is near the Honker large OGR complex. Legacy standard and guideline does not apply in this VCU.
3015000

3016000

A1

A4.1L

A2.1R

A2.1L

A4.4L

A4.5L

1

A4.6L

1.2 R.1R

A1.4L

A1.1L.1R

1.2R

A1.2L

A1.3L

A3.1R

A1.1R

A2

A4.2L

1

A1.1L

A4

A4.3L

A4

A3

A4.5L.1R

A4

A3

A3.1 L

A1

A4.1R

A3.2L

1974

1976

1987

363

395

88

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 395 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3015000

3016000

A4.4L

A1

A4.1R

A1

A4.1L

A1.1R

A2.1R

A2.1L

A3.2L

A4.5L

1

A4.6L

1.2 R.1R

A1.4L

A1.1L.1R

1.2R

A1.2L

A1.3L

A3.1R

A3

A2

A4.2L

1

A1.1L

A4

A4.3L

A4

A3

A4.5L.1R

A4

A3.1 L

1974

1976

1987

363

395

395

395

395

88

395

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 395 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
3015000

3016000

A4.4L

A1

A4.1R

A1

A4.1L

A1.1R

A2.1R

A2.1L

A3.2L

A4.5L

1

A4.6L

1.2 R.1R

A1.4L

A1.1L.1R

1.2R

A1.2L

A1.3L

A3.1R

A3

A2

A4.2L

1

A1.1L

A4

A4.3L

A4

A3

A4.5L.1R

A4

A3.1 L

1974

1976

1987

363

395

395

395

395

88

395

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 395 Alternative 5 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Sytematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt5.mxd 14 July 2012

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Unit 401

Total Unit

Acres:

17.0 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

362

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 401 is made-up of a western hemlock / Alaska-cedar stand in the north that transitions to a mixed 

conifer stand in the center of the unit and then to a Sitka spruce stand in the southwest. Mistletoe was rated as low. Stem 

decay and defect were rated as moderate and high. Windthrow risk is moderate. All adjacent past harvest areas have 

regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings. Portions of the unit in 

NW corner were dropped due to low volume timber and steep slopes. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable and helicopter settings. Shovel settings are planned for yarding to the 

existing NFS road 2000440. Cable settings are planned for downhill yarding to landings on existing NFS road 2000440. 

Helicopter settings are planned for yarding to landings on existing NFS road 2000440.

This unit is adjacent to State lands on the western boundary.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 1600 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A2 Class: I, III Flagging: B/W, O/W C- Type: MMS, HCM

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B 

Stream#: A1 Class: II, III Flagging: B/W, O/W C- Type: HCL, HCD

Concerns: none known

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A and B

Stream#: A2.1R Class: III Flagging: O/W C- Type: HCM

Unit

Number 401 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 401

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: A2.1R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 15 acres of Low and 2 acres of Very Low SIO. It is Seen at a distance of about 1/2 mile or more from portions of the 

Control Lake to Naukati highway. Typical opening sizes described in the Forest Plan are 40 to 60 acres for Low SIO areas 

and 80 to 100 acres for Very Low SIO areas with Intermediate VAC. The seen portion of unit is about 15 acres, so no 

concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20% to about 70%. About 6 acres of the original reconnaissance area (which included additional 

portions of the OGR) were excluded due to soil concerns. There is approximately 1/2 acre of forested wetland in the northern 

portion of the unit (BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension yarding or shovel 

yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small 

non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under 

some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage 

and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern portion of unit). Unit is in an area of known wolf use. Legacy standard and guideline does not apply in this 

VCU.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary is adjacent to unit to the south, west, and east (separated by a stream buffer). 

Alterative 4: Adopts Interagency OGR coinciding with unit location.
2000440

2000441

2000440

A6

A1

A9

A9.1R.1L

A9.1R

A3

A5

A2

A4

A1

A2

A2

A1

A2.1R.1R

A2.1R

A2.1L

A9.3R A9.2R

1986 1986

1989

1989

1989

1989

2005

401

402

403

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 401 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 402

Total Unit

Acres:

6.4 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

172

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 402 is predominantly a western Hemlock / Alaska-cedar stand. Generally old-growth stand 

structure dominates. Moderate windthrow, moderate to high defect, and light evidence of mistletoe define the health of the 

stand. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings. Parts of the original unit in the northwest corner were dropped due to low volume timber and steep 

slopes

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

Unit is planned for helicopter yarding to landings on the existing NFS road 2000440.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 5400 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A9 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A9.1R	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A9.1R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A9.1R.1L Class: III Flagging: O/W C- Type: HCM

Unit

Number 402 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 402

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A9.2R	 Class: III Flagging: O/W C- Type: HCM

Concerns: noneknown

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A9.2R	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A8 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A5 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A4 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A3 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2 Class: I, III Flagging: B/W, O/W C- Type: MMS, HCM

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A2.1L	 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:
Unit 402

All 6 acres of unit are in Low SIO. It is Seen at a distance of 1/2 mile or more from portions of the Control Lake to Naukati 

highway. Approximate opening sizes described in the Forest Plan for Low SIO areas are 15 to 40 acres with Low VAC and 

seen portion of unit is about 6 acres. In addition, unit is broken by riparian buffer and areas dropped due to soils. No 

concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 30% to greater than 72%. There is less than 1/4 acre of slopes over 72% in the unit that are 

suitable for harvest with partial suspension requirements. A total of about 30 acres of the original reconnaissance area were 

dropped due to steep slopes and soil concerns. About 5 of these excluded acres are outside of the modified OGR. In the 

remaining unit, a minimum of partial suspension yarding would meet soil and wetland resource concerns (BMPs 12.5, 13.5, 

and 13.9). No wetlands have been mapped in the unit.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern portion of unit). It is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary ist adjacent to unit to the west. 

Alterative 4: Adopts Interagency OGR, coinciding with location of unit.
925

2000440

A2.1R.1R

A2.1R

A2.1L

A9.3R

A9

A9.2R

A9

a15

A9.1R.1R

A1

A1

A9.1R.1 L

A9.1R

A9.1R

A9

A8

A3

A15

A10

A7

A2

A4

A5

A6

A1

A2

A2

1988

1989

1989

1989

1988 1989

402

403

404

401

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 402 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 403

Total Unit

Acres:

17.5 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

402

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is old-growth timber comprised of patchy, lightly stocked, western hemlock and Alaska-cedar, 

as well as some scattered mountain hemlock and western redcedar in the upper elevations. Windthrow risk is moderate. 

Mistletoe occurrence is light throughout the entire unit. Overall defect is moderate to high with primary defects being stem 

decay, root/butt diseases, and cedar decline. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, and helicopter yarding. Helicopter settings are planned for yarding to 

landings on the existing NFS road 2000440. Shovel settings are planned for yarding to the existing NFS road 2000440.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 6400 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek (Stream characteristics do not include project-specific, field-verified, information).

Stream#: A15 Class: I Flagging: B/W C- Type: FPM

Concerns: none known

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: A10 Class: I, II, III Flagging: B/W, O/W C- Type: HCL, HCD

Concerns: none known

Buffer (RMA): Class I and Class II for HCL greater of 100 feet or the top of the side-slope break. Class III for HCD to the top 

of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A9 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B

Unit

Number 403 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 403

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

All 17 acres of unit are in Low SIO. It is Seen at a distance of 1/2 mile or more from portions of the Control Lake to Naukati 

highway. Typical opening sizes described in the Forest Plan for Low SIO areas are 15 to 40 acres for Low VAC and 40 to 60 

acres for Intermediate VAC. The Seen portion of unit is about 17 acres. Even if combined with Unit 402, which is 6 acres, 

opening size would be about 23 acres. In addition, unit 402 is broken by riparian buffer and areas dropped due to soils, and 

is across another riparian buffer from Unit 403. No concerns.

 RECREATION:

Unit is adjacent to the Kogish Roadless Area and small OGR on the southwest.

 SOILS/WETLANDS:

Slopes range from about 25 to greater than 72%. All slopes greater than 72% are located in the soil exclusion area. About 4 

acres were excluded due to unsuitable steep slopes. In the remainder of the unit, the soils and wetlands are suitable for 

minimum partial suspension yarding or shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 

25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting. No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern portion of unit). It is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary adjacent to unit to the southwest. 

Alterative 4: Adopts Interagency OGR, coinciding with location of unit.
925

2000440

A9.3R

A9

A9.2R

A13

A12

A11

A9

a15

A15

A5

A2.1R

A9.1R.1R

A9.1R.1 L

A9.1R

A9.1R

A15

A2

A6

A9

A8

A10

A7

A2

A13.1L.1R

A2.1L

1988

1989

1989

1988 1989

402

403

404

405

401

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 403 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 404

Total Unit

Acres:

5.0 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

91

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This lower elevation unit consists of old-growth structure that is comprised of western hemlock along with 

some scattered Sitka Spruce. Windthrow risk is low, with only minor indications of past windthrow throughout the stand. 

Mistletoe occurrence is light as well. Overall defect is moderate with primary defect being stem decay. There are no adjacent 

past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 2000440.

Unit is adjacent to the Kogish Roadless Area and small OGR on the southwest.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 6900 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek (Stream characteristics do not include project-specific, field-verified, information).

Stream#: A15 Class: I Flagging: B/W C- Type: FPM

Concerns: none known

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A10 Class: I, II Flagging: B/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class I and Class II for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 404 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 404

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 2 acres in Low and 3 acres in Very Low SIO. Portion of the unit is Seen at a distance of 1/2 mile or more from 

portions of the Control Lake to Naukati highway. Typical opening sizes described in the Forest Plan for Low SIO areas are 

60 to 100 acres for High VAC and seen portion of unit is about 2 acres. Even if combined with Units 402 and 403, opening 

size would be about 25 acres. In addition, unit 402 is broken by riparian buffer and areas dropped due to soils, and is across 

another riparian buffer from Unit 403; unit 404 is across a TTRA buffer from unit 403.

 RECREATION:

Most of the southwestern boundary of unit is adjacent to the Kogish inventoried roadless area. Only about 75 ft of the 

existing road borders the unit outside the roadless area; then the road enters the roadless area and the unit is separated 

from it by the roadless area.

 SOILS/WETLANDS:

Slopes are gentle throughout the unit, ranging from about 10% to about 35%. The soils and wetlands are suitable for shovel 

yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel 

yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid 

track slippage and rutting. No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary adjacent to unit on west. 

Alterative 4: Adopts Interagency OGR, coinciding with location of unit.
925

2000440

2000440

A10

a15

A9.2R

A9

A15

A1

A

1

13

A12

A

A13.1L

A9.1R.1R

A13

A9.1R.1 L

A9.1R

A9.1R

A9

A10

A15

A13.1L.1R

A9

A9.3R

A13.1L

1988

1989

1988 1989

403

404

405

406

402

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 404 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 405

Total Unit

Acres:

4.7 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

62

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 405 is predominantly a western hemlock stand with old-growth stand structure. Sitka spruce are 

scattered. Moderate windthrow, moderate to high defect, and a light occurrence of mistletoe were noted for the stand. There 

are no adjacent past harvest areas. State lands border the unit on the east.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 2000440. Note that the eastern boundary of 

the unit borders State lands.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 9500 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

 

Stream#: A15 Class: I Flagging: B/W C- Type: LCM, FPM

Concerns: none known

Buffer (RMA): Class I for LCM greater of 100 feet or to the top of the side-slope break. Class I for FPM greater of 130 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A 12 Class: I Flagging: B/W C- Type: MCS

Concerns: none known

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A11 Class: I Flagging: B/W C- Type: AFM

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

Unit

Number 405 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 405

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit entirely in Very Low SIO. No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. A minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary near unit to west, but not adjacent. 

Alternative 4: Unit dropped because location coincides with the biologically preferred OGR.
2000430

2000440

925

2000440

A15

A13.1L

A9

A13

A10

A13.1L.1R

A14

A13.1L

A9

A15

A8

A15

A11

A10

A13

A12

1988

2003

1991

361

402

403

404

405

406

407

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 405 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 406

Total Unit

Acres:

4.3 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

136

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is a western hemlock and western redcedar stand with old-growth stand structure. Alaskacedar are present as a lesser component. Moderate windthrow, moderate defect, and light evidence of mistletoe were noted. 

A 2003 even-age past harvest unit is along the southwest boundary. This harvest does not appear to meet green-up 

requirements at this time. The combined acreage of unit 406 and this past harvest do not however exceed 100 acres. No 

adjustments to unit 406 are required as a result. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the existing NFS road 2000440.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 9500 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A14 Class: III Flagging: O/W C- Type: AFH, HCM

Concerns: none known

Buffer (RMA): Class III for AFH greater of 140 feet or active portion of the alluvial fan. Class III for HCM to the top of the sideslope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A13 Class: I, II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class I and II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the sideslope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A13.1L Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the sideslope break. 

Alternatives: 3 Buffer (RAW): no review needed

Unit

Number 406 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 406

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit entirely in Very Low SIO. No concerns.

 RECREATION:

Kogish inventoried roadless area is adjacent to the western boundary of unit.

 SOILS/WETLANDS:

Slopes range from about 20 to 50%. No wetlands have been mapped in the unitThe soils and wetlands are suitable for 

shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped because location coincides with the biologically preferred OGR.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, 5: Unit not in alternative.

Alternative 3: OGR boundary adjacent to unit to the west.
2000440

2000440

A10

A10

A13.1L

A10.2L

A13

A15

A15.1R

A10

A13.1L.1R

A14

A13.1L

A15

A9

A8

A11

A13

A12

2003

2004

1991

2004

360

361

404

405

406

407

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 406 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 407

Total Unit

Acres:

23.2 Prescription: Clearcut

VCU

Number:

595 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

584

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 407 is predominantly a western hemlock and Sitka spruce stand where old-growth stand structure 

dominates. Moderate windthrow, low to moderate defect, and light evidence of mistletoe define the stand. There was some 

evidence of wind shake seams in the Sitka spruce in the south end of the unit. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with low to moderate levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 2000440.

 ENGINEERING/ROADS:

Unit is accessed by reconstruction of existing NFS road 2000440, totaling 9500 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Steelhead Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A15 Class: I Flagging: B/W C- Type: FPM

Concerns: none known

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A8 Class: II, III Flagging: B/W, O/W C- Type: HCDw, HCM

Concerns: none known

Buffer (RMA): Class II for HCDw greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A15.1R Class: II Flagging: B/W C- Type: HCL, HCLw

Concerns: none known

Buffer (RMA): Class II for HCL and HCLw greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

Unit

Number 407 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 407

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit entirely in Very Low SIO. No concerns.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to over 72%. Less than 1/4 acre of slopes greater than 72% are mapped along the westsouthwest side of the unit that are suitable for harvest with partial suspension requirements. A minimum of partial suspension 

would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in an area of known wolf use. Legacy standard and guideline does not apply in this VCU.

Alternative 4: Unit dropped because location coincides with the biologically preferred OGR.

Old-growth Reserve (OGR) Boundary

Alternatives 2, 4, 5: Unit not in alternative.

Alternative 3: OGR boundary is across Class I stream buffer from OGR to the west.
2000400

2000440

2000440

A13.1L

A13

A12

A10.1L

A13

A15.1R.1R.1R

A13.1L

A14

A15.1R

A15.1R.1R

A15.1R.22

A10

A10.1L.1L

A15

A15.1R.3R

A9

A15

A10.2L

A8

A10

2003 2004

1991

2003

360

361

405

406

407

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 407 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

595

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Unit 408

Total Unit

Acres:

53.1 Prescription: 50% Removal

VCU

Number:

597.

2

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

783

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is mostly western hemlock with western redcedar, Alaska-cedar, and Sitka spruce as lesser 

components. Old-growth stand structure dominates. Stem decay and top breakage are common. Moderate to high defect, a 

low incidence of mistletoe and light-patchy Alaska-cedar decline were noted. Windthrow risk for the stand is moderate. All 

adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 50 percent of the pretreatment basal area, based on standing live tree total for the unit, uncut. Individual 

trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any small 

groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address insect 

and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for harvest will 

generally be well distributed and no large openings will occur as a result of the harvest. Review the marking guides and 

silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3013200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

 

Stream#: 1 Class: I Flagging: B/W C- Type: MMM, MCS, HCV, MCS

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for MCS and HCV greater of 100 feet or to the top of the side-slope break. 

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A2 Class: I, III Flagging: B/W, O/W C- Type: MMS, HCM, HCO

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM and HCO to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A2.2L Class: III Flagging: O/W C- Type: HCO

Unit

Number 408 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 408

Concerns: none known

Buffer (RMA): Class III for HCO to the top of the side-slope break

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2.3L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A7 Class: I, III Flagging: B/W, O/W C- Type: MCS, HCM

Concerns: none known

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the sideslope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit borders the Karta inventoried roadless area along its southwestern boundary.

 SOILS/WETLANDS:

Slopes range from about 50 to greater than 72%. About 43 acres of original unit were excluded due to slides, steep slopes, 

and wet notches. In the remaining unit, a minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern end of unit). Unit is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location. 

Prescription is 50% basal area removal to maintain habitat values. Legacy standard and guideline applies in this VCU; 

however, no legacy acres required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., 

no openings larger than 20 acres).
3013200

1

A7

A2.3L

A6

A2.2L

A2

A4

A2.1L

1

A2

A5

A2.1R

1989

408

409

410

413

413

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 408 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

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Unit 409

Total Unit

Acres:

52.7 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,756

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 409 is a western hemlock stand that transitions to western hemlock and Alaska-cedar in the north 

and south-east. Sitka spruce and western redcedar are present as lesser components. Old-growth stand structure dominates 

the area. Moderate windthrow, moderate defect, and light occurrence of mistletoe occur. All adjacent past harvest areas 

have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

The legacy standard and guide applies in this VCU. This requires that approximately 31 acres of productive old growth

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to cover 

unsuitable soils and total mapped legacy is approximately 49 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

Unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

proposed temporary road and existing NFS road 3013200. Cable settings are planned for downhill yarding to landings on the 

proposed temporary road. Helicopter settings are planned for yarding to landings on existing NFS road 3013200.

Unit is adjacent to the Karta Roadless Area on the east.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1900 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: 1 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 4	 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A13 Class: I, III Flagging: B/W, O/W C- Type: MCS, HCD

Concerns: none known

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top of the sideslope break.

Alternatives: 4 Buffer (RAW): no review needed

Unit

Number 409 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 409

Protection: Category A and B

Stream#: A2 Class: I, III Flagging: B/W, O/W C- Type: MMS, HCM, HCO

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCM and HCO to the top of the side-slope break.

Alternatives: 4	 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A2.2L Class: III Flagging: O/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class III for HCO to the top of the side-slope break

Alternatives: 4	 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2.3L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break

Alternatives: 4	 Buffer (RAW): no review needed

Protection: Category B 

Temporary roads for Unit 409: Alternatives 4 -- One Class I stream crossing. The temporary roads have not been field 

verified and will be surveyed before implementation. Crossing structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). The Class 1 and II crossing will be 

designed to provide fish passage, using a log culvert or bridge, will be installed under current timing constrictions and 

concurrence from the State will be solicited prior to starting the work. During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit borders the Karta inventoried roadless area along its eastern boundary.

 SOILS/WETLANDS:

Slopes range from about 40% to 70%. There are approximately 9 acres of forested wetland in the unit (BMP 12.5).The soils 

and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow 

BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent 

rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care 

when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1/2 acre of forested wetland within the unit and about 1/4 acre outside the unit. Wetland 

avoidance was not practicable due to the abundance of forested wetland. Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northwestern portion of unit). Unit is in 2008 Forest Plan OGR, which was exchanged in favor of biologically preferred 

location. Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and 

marten habitat.
3013200

A4

A2

A3

A13

A2

A1

A2.2L

A2.3L

A2.1L

A2.1R

A2

A12

1989

408

409

410

411

413

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 409 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

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Unit 410

Total Unit

Acres:

19.8 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

982

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is a western hemlock and Alaska-cedar stand. Sitka spruce are scattered throughout. Oldgrowth stand structure dominates. Moderate windthrow. Moderate defect and a low to moderate incidence of mistletoe were 

present. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

The legacy standard and guide applies in this VCU. Although unit acres are slightly less than 20, combined with Units 409 

and 411 it represents a larger opening. This requires that approximately 9 acres of productive old growth representative of 

the overall composition of the planned harvest area be maintained indefinitely in this unit. Legacy was placed to block up 

POG in the center of unit to divide opening in two and to cover RMAs. Total mapped legacy is approximately 9 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

existing NFS road 3013200. Cable settings are planned for downhill yarding to landings on the existing NFS road 3013200. 

Helicopter settings are planned for yarding to landings on the existing NFS road 3013200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: 1 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetaion or soils, or riparian associated wetland fens.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A12 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A13 Class: I, III Flagging: B/W, O/W C- Type: MCS, HCM

Unit

Number 410 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 410

Concerns: none known

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the sideslope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

There are no slopes greater than 72% mapped in the unit. There is a small (less than 1 acre) debris torrent that initiated 

within the unit near the north boundary (1991). There is approximately 1 acre of forested wetland in the unit (BMP 12.5). The 

soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should 

follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to 

prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use 

care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. 

A temporary road will impact about 1/4 acre of forested wetland in the unit. Wetland avoidance was not practicable due to 

the abundance of forested wetland in the area needed for access and engineering constraints. Provide adequate cross 

drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western half of unit). Unit is in 2008 Forest Plan OGR, which was exchanged in favor of biologically preferred location. 

Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and marten 

habitat.
3013200

3013220

1.10R

A13

1.11R

A1

1.10R.1L

B1

A2.1L

B3

A11

A2

3.1R

A5

1

A4

3

1

A12

1.9R

A2.2L

B2

A2

A3

1.12R

1989

1989

1989

408

409

410

411

413

413

414

414

46

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 410 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

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Unit 411

Total Unit

Acres:

20.3 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

438

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is predominantly a western hemlock stand with Sitka spruce scattered throughout. Old-growth 

stand structure dominates. Moderate windthrow, moderate defect and a low to moderate incidence of mistletoe were present. 

All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

The legacy standard and guide applies in this VCU. This requires that approximately 12 acres of productive old growth

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to cover 

unsuitable soils and RMAs in orginal unit and the total is approximately 20 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

existing NFS roads 3013200 and 3012220. Cable settings are planned for downhill yarding to landings on the existing NFS 

road 3013220. Helicopter settings are planned for yarding to landings on the existing NFS road 3013200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: 1 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A

Stream#: A11 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A12 Class: III Flagging: O/W C- Type: HCD

Unit

Number 411 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 411

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit borders the Karta inventoried roadless area along its eastern boundary.

 SOILS/WETLANDS:

Slopes range from about 40% to greater than 72%. About 16 acres were excluded due to very steep slopes and landslides. 

In the remainder of the unit, there are no slopes greater than 72% mapped. About 1/4 of the unit is covered by forested 

wetland (BMP 12.5). The soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All 

logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small nonforested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil 

moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western half of unit). Unit is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location. Legacy 

standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and marten habitat.
3013220

3013200

1.10R

B2

A13

1.11R

A1

1.10R.1L

2

B1

B3

A11

A2

B1

1

1

1.7R

1

A12

1.9R

A3

A2

1.12R

1989

1989

1989

409

410

411

413

414

414

414

414

414

46

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 411 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 413

Total Unit

Acres:

3 - 45.4

4 - 56.5

Prescription: 3 - Clearcut

4 - 50% Removal

VCU

Number:

597.

2

Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

3 - 1,135

4 - 706 LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This lower elevation unit consists of old-growth stand structure that is comprised of western hemlock as 

well as moderately-stocked Alaska-cedar and scattered Sitka spruce and western redcedar. Windthrow risk is moderate to 

high. Mistletoe occurrence is low. Physical defects were rated low but stem decay was high. Alaska-cedar decline was 

evident on lower site index, less well drained areas in the west. Portions of the unit were dropped along the southern edge 

due to poor timber. All nearby past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no 

longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut (Alternative 3)

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of stem decay resulting in a situation where stand growth is 

being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, 

promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 19 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to cover 

unsuitable soils and RMAs. Total mapped legacy is approximately 19 acres. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

Silvicultural Prescription: Uneven-age Management Single Tree Selection (Alternative 4)

Maintain at least 50 percent of the pretreatment basal area, based on standing live tree total for the unit, uncut. Individual 

trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any small 

groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address insect 

and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for harvest will 

generally be well distributed and no large openings will occur as a result of the harvest. Review the marking guides and 

silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

Alternative 3: This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for 

yarding to the proposed temporary road. Cable settings are planned for downhill yarding to landings on the proposed 

temporary road. Helicopter settings are planned for yarding to landings on the proposed temporary road. 

Alternative 4: This unit is planned for helicopter yarding to landings on the existing NFS road 3013200.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road in Alternative 3, totaling 2,500 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 413 Alternatives 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 413

 FISHERIES:

Streams are tributaries to Goose Creek. Some stream characteristics do not include project-specific, field-verified, 

information.

Stream#: 1 Class: I Flagging: B/W C- Type: MMM, MCS, HCV

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class I for MSC and HCV greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category A 

Stream#: 1.12R Class: I, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: A2 Class: I, III Flagging: B/W, O/W C- Type: MCS, HCM

Concerns: none known

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the sideslope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A3 Class: I, IV Flagging: B/W, O/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: A4 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category C 

Stream#: A6 Class: I Flagging: B/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class I for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 413 : Alternatives 3 -- One Class I, one Class II, one Class III, and one class IV stream crossings 

and Alternative 4 - no planned roads. The temporary roads have not been field verified and will be surveyed before 

implementation. Crossing structures and locations will be approved by USFS, in consultation with fisheries biologist or 

hydrologist, prior to construction (BMP 14.17). The Class 1 and II crossing will be designed to provide fish passage, using a 

log culvert or bridge, will be installed under current timing constrictions and concurrence from the State will be solicited prior 

to starting the work. During construction of temporary roads implement BMPs 12.16, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns
Unit 413

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 30 to greater than 72%. About 16 acres were excluded due to very high landslide potential, colluvial 

activity, MMI4 soils, steep slopes, and unstable drainages. There are no slopes greater than 72% mapped in the remainder 

of the unit. Approximately 1/4 of the unit in both alternatives consists of forested wetland in the eastern portion of the unit 

(BMP 12.5). In the harvest area of the unit, the soils and wetlands are suitable for a minimum partial suspension yarding or 

shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid 

the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding 

under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track 

slippage and rutting.

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

Alternative 3:

There are approximately 10 acres (24% of the unit) of forested wetland in the eastern portion of the unit (BMP 12.5).

Alternative 4:

There are approximately 10 acres (19% of the unit) of forested wetland in the eastern portion of the unit (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern half of unit). Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some 

deer winter range and marten habitat. 

Alternative 4: Helicopter yarding with 50% basal area removal to minimize road construction and maintain habitat values. Unit 

is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location. No Legacy acres required because 

adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Not in alternative

Alternative 3: OGR boundary adjacent to unit to the south, east, and west. 

Alterative 4: Adopts Interagency OGR in a different location, away from unit to the north.
3013000

3013200

3013220

3013000

3.1R.1R

A4

A5

3

4. 2 L 3.1L .1R

4.1L

3.1 R

5

3.1R

4

1

1

1.10R

1.9R

3.1L

4

3.1R

1

2

A2.1L

1

4

2

A2

A3

A7

1.12R

A11

1

B2

A13

3

1.11R

A1

1.10R.1L

A6

A12

3

B3

A2

1989

1989

1989

47

413

46 414

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 413 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3013220

3013000

3013200

3.1L .1R

A1

1.10R.1L

A6

A12

1

B3

1

A2

A4

A5

4. 2 L

4.1L

3.1 R

5

3.1R.1R

3.1R

4

1

1

1.10R

1.9R

3.1L

4

3.1R

3

2

A2.1L

3

4

2

A2

A3

A7

1.12R

A11

1

B2

A13

3

1.11R

1989

1989

1989

408

409

410

411

413

413

414

414

414

46

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 413 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 414

Total Unit

Acres:

16.2 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

344

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 414 is an old-growth stand of western hemlock. Western redcedar and Sitka spruce are scattered 

throughout. Windthrow risk is high. Mistletoe occurrence is moderate. Physical defects are low but stem decay is moderate. 

Overall defect is moderate. This stand is over-mature with declining growth. All nearby past harvest areas have regeneration 

at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the original unit is less than 20 acres, therefore no legacy setaside is required.

 TIMBER/LOGGING:

This unit is planned for a combination of cable and helicopter yarding. Cable settings are planned for uphill and downhill 

yarding to landings on the existing NFS road 3013200. Helicopter settings are planned for yarding to landings on the existing 

NFS road 3013200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek (Some stream characteristics do not include project-specific, field-verified, 

information).

Stream#: 1 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 1.6R Class: I, III Flagging: B/W, O/W C- Type: MMO, HCD

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCD to the top of the side-slope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: 1.7R Class: III Flagging: O/W C- Type: AFH, HCD

Unit

Number 414 Alternatives 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 414

Concerns: none known

Buffer (RMA): Class III for AFH greater of 140 feet or active portion of the alluvial fan. Class III for HCD to the top of the sideslope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: B1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the side-slope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: B2 Class: I, III Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none known

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCO to the side-slope break.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and B

Stream#: 1.9R Class: I, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: none known

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: B3 Class: I, III, IV Flagging: B/W, O/W, G/W C- Type: MMO, HCO

Concerns: none known

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCO to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A, B and C 

Stream#: 1.10R Class: I, II, III Flagging: B/W, O/W C- Type: MMO, HCD

Concerns: none known

Buffer (RMA): Class I and II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class III for HCD to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and B

Stream#: 1.11R Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category A and C

Stream#: 1.12R Class: I, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 and 4 	Buffer (RAW): no review needed

Protection: Category A and C

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none	 Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.
Unit 414

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. About 29 acres were excluded due very high landslide potential, colluvial 

activity, MMI4 soils, steep slopes, and unstable drainages. In the remainder of the unit, there are no slopes greater than 72%. 

A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). No wetlands 

have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location under Alt 4. Legacy standard and 

guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 acres.

Old-growth Reserve (OGR) Boundary

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: OGR boundary adjacent to unit to the east. 

Alterative 4: Adopts Interagency OGR in a different location, away from unit to the north.
3013200

3013220

3013000

3.1 R

A12

B1

B3

A11

1

3

A2

A4

1.7R

A13

1.7R.1R

1

1.6R

1

1.10R

3

1.7R.1R.2 L

1.9R

3.1R

1.7R.1

1.1R

R

1.7R.4R

1.7R.1R.1L

2

A2

1.5R.1L

1.6R.1L

1.12R

1.6R

1

1.1L

1.7R.3R

B2

1

1.11R

1.7R.2R

1.10R.1L

1.5R

B1

2

1989

1989

1989

1989

1989

47

413

414

46

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 414 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3013000

3013200

3013220

1.7R.2R

1.7R.1R.1L

1.10R.1L

1.5R

B1

1

A12

1.7R.1R

B1

B3

A11

2

A2

A4

3.1 R

1.7R

A13

1.7R.1R

1

1.6R

1

1.10R

3

1.7R.1R.2 L

1.9R

3.1R

1.11R

1.1R

1.7R.4R

3

2

A2

1.5R.1L

1.6R.1L

1.12R

1.6R

1

1.1L

1.7R.3R

B2

1

1989

1989

1989

1989

1989

410

411

413

414

414

414

414

415

414

46

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 414 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 415

Total Unit

Acres:

5.4 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable

Net Harvest

Volume

(MBF):

91

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is a western hemlock old-growth stand with high windthrow risk, moderate to high defect, and 

light evidence of mistletoe. The timber is over-mature and shows signs of declining growth. All nearby past harvest areas 

have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is over-mature with moderate to high levels of decay and defect resulting in a situation 

where stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

Unit is planned for downhill cable yarding to landings on the existing NFS road 3013220.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit

Number 415 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 415

No Concerns

 SOILS/WETLANDS:

Slopes range from about 45% to greater than 72%. Less than 1/4 acre was excluded due to a landslide, wet slopes, slopes 

greater than 72%. In the remainder of the unit, about 1/2 acre of slopes greater than 72% are mapped that are suitable for 

harvest with partial suspension requirements. A minimum of partial suspension would meet soil and wetland resource 

concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location. Legacy standard and guideline applies 

in this VCU, however there are no requirements for this unit because it is less than 20 acres.
3013200

3013220

3013000

1.7R.2R

B2

B3

A2

1

1.7R.1R.1L

1.4R

A2.1L

1.5R.1L

1.5R

A2.1L.1R

B1

1.11R

A2.1L

1.7R

A11

1.10R.1L

1

1.7R.1R

1.6R

1.10R

2

B1

1.7R.4R

1.7R.1R.2 L

1.9R

1.7R.1R

1.7R.3R

A2

A1

1.6R.1L

1.6R

1989

1989

1989

1989

1989

1992

1992

414

414

414

414

414

418

411

415

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 415 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 418

Total Unit

Acres:

35.9 Prescription: 50% Removal

VCU

Number:

597.

2

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

595

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 418 is predominantly a western hemlock and western redcedar stand with an area of more pure 

western hemlock in a narrow central band. Generally old-growth stand structure dominates, however large areas of 

windthrow origin even-age structure in the original planned unit have been removed from harvest consideration. Moderate to 

heavy past windthrow, moderate defect and low occurrence of mistletoe were noted in the stand. The windthrow risk rating is 

high. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 50 percent of the pretreatment basal area, based on standing live tree total for the unit, uncut. Individual 

trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any small 

groups will usually be less than one acre but may occasionally go up to 2 acres in size where needed to address insect and 

disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for harvest will 

generally be well distributed and no large openings will occur as a result of the harvest. Review the marking guides and 

silvicultural prescription for more detailed information and direction regarding how to implement this prescription.

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3013150.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: Lake A1 Class: I Flagging: B/W C- Type: L

Concerns: none known

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2 Class: I Flagging: B/W C- Type: FPM

Unit

Number 418 Alternatives 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 418

Concerns: none known

Buffer (RMA): Class I for FPM greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland fens.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A2.1L Class: I, III Flagging: B/W C- Type: AFM, HCD

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. Class III for HCD to the top of the sideslope break.

Alternatives: 4 Buffer (RAW): no review needed

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 37% to greater than 72%. About 5 acres were excluded due to landslides, wet slopes, and slopes 

greater than 72%. In the remainder of the unit, there are no slopes greater than 72% mapped. There is less than 1/4 acre of 

forested wetland in the unit (BMP 12.5). A minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northwestern portion unit). Unit is in 2008 Forest Plan OGR exchanged in favor of biologically preferred location. Unit 

is adjacent to new OGR on the north. Prescription is 50% basal area removal to maintain habitat value. 

Legacy standard and guideline applies in this VCU. No Legacy acres required because adequate structure retained in unit 

under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
LAKE 

A1

3013220

3013150

3013200

2 2

1.3R

A2

A2.1L

B1

A2.1L.1R

A2.1L

A2

A1

1989

1992

1989

1989

1989

1992

1992

44

418

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 418 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 419

Total Unit

Acres:

3.0 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable

Net Harvest

Volume

(MBF):

85

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is characterized by old-growth stand structure that is comprised of western hemlock and 

western redcedar with scattered patchy Alaska-cedar. Windthrow risk is moderate to low. Mistletoe occurrence is low. Alaska 

cedar decline is evident in the stand along lower productivity edges. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy,and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for uphill yarding to landings on the existing NFS road 3013200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek.

Stream#: 1.2 R Class: III Flagging: O/W C- Type: HCO

Concerns: none

Buffer (RMA): Class III for HCO to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category B 

Stream#: 1.3R Class: II, III Flagging: B/W, O/W C- Type: HCM, HCO

Concerns: none.

Buffer (RMA): Class II for HCM greater of 100 feet or the top of the side-slope break. Class III for HCO to the top of the sideslope break.

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

Unit

Number 419 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 419

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to 60%. No wetlands occur within the unit. A minimum of partial suspension would meet soil and 

wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres. Unit is close to the new OGR boundary on the east.

Alternatives 2 and 5: Unit not in alternative.

Alternative 3: Unit is very close to new OGR boundary on the east.

Alternative 4: Unit dropped because location coincides with the biologically preferred OGR.
LAKE 

A1

LAKE A1

3013200

3013000

3013220

1.1R.6R

1.1R.7R

1.5R

1.4R

A1

A2

5R.1L

1.6R

.1R.10R

B1

87-1.1R

1.6R. 1L

87-1.1R

1.2R

1.6R

1

1.3R

1.1R.9R

1.1R.3L

1.1R.8R

1.1R.2L

A2

A2.1L

A1

1989

1989

1989

1989

43

44

419

42 420

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 419 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 420

Total Unit

Acres:

20.6 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

380

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 420 is predominantly a western hemlock and western redcedar stand with an area of more pure 

western hemlock located in the narrow central area. Generally old-growth stand structure dominates, however many areas of 

past windthrow have created a mosaic of stand structure. Moderate to heavy past windthrow, moderate to high defect and 

low occurrence of mistletoe were noted in the stand. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of stem decay resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 16 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. The required legacy was 

placed to coincide entirely with areas already dropped for soil concerns, which divides unit into three openings. The total 

mapped legacy is about 32 acres. Any adjustments to the planned unit during implementation must consider the planned 

acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3013150.

New OGR boundary follows west and southwest edges of unit.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

One population of lesser round-leaved orchid (sensitive plant) and one population of western meadowrue (rare plant) occur 

outside of the unit, but close to the western border. No direct effects would occur, but the populations could be indirectly 

affected by the harvest.

 FISHERIES:

Streams are tributaries to Goose Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream A4 Class: I Flagging: B/W C- Type: LCM

Concerns: none 

Buffer (RMA): Class I for LCM greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A5 Class: I Flagging: B/W C- Type: MCS

Concerns: none 

Buffer (RMA): Class I for MCS greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Unit

Number 420 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 420

Protection: Category A

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: blowdown present and bank erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15% to greater than 72%. About 32 acres were excluded due to slopes over 72% and unsuitable 

soils. In the remainder of the unit, there are no mapped slopes greater than 72%. The entire unit consists of forested wetland 

(BMP 12.5). A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standards and guidelines applies in this VCU; positioning 

of Legacy acres covers some deer winter range. Unit is adjacent to new OGR.

Alternative 4: Unit dropped because location coincides with the biologically preferred OGR.
LAKE 

A1

LAKE A1

3013200

3013150

3013160

2

2

1.2R

A5

84-1.1R.1R

1

A 2

1.1R

87-1.1R

A6

A1

A4

2.14R

2

1.1L

1

1991

1994

1991

1989

1994

1992

44

51

52

419

420

421

422

423

43

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 420 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 421

Total Unit

Acres:

5.9 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

112

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 421 is western hemlock and western redcedar that changes to mountain hemlock in the northeast 

corner. Old-growth stand structure dominates. Moderate windthrow, moderate to high defect, and low evidence of mistletoe 

define the existing condition. The adjacent past harvest along the southern boundary meets green-up requirements. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3013000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek.

Stream#: 1.1R Class: I, III Flagging: B/W, O/W C- Type: HCD

Concerns: blowdown present and bank erosion

Buffer (RMA): Class I for HCD greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top of the 

side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit

Number 421 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 421

No Concerns

 SOILS/WETLANDS:

Slopes are about 20%. The entire 6-acre unit is forested wetland (BMP 12.5). A minimum of partial suspension would meet 

soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (northern portion of unit). Legacy standard and guideline applies in this VCU, 

however there are no requirements for this unit because it is less than 20 acres. 

Alternatives 2 and 5: Not in alternative.

Alternative 3: Unit is adjacent to new OGR boundary on east.

Alternative 4: Unit dropped because location coincides with biologically preferred OGR.
LAKE A1

3013000

3013150

3013200

1.1R.2L

1.1R.5R

1.1R

1.1R.4R

84-1.1R.1R

A6

A5

A4

87-1.1R

1R.9R

1R.1R

1.1R.3L

2

1.1R

1.1R .1 L

2

1.1R.8R

1

A1

1.1R.3R

A7

1.1R.7R

1.1R.2R

1.1R.6R

1989

1989

1989

43

44

51

421 420

422

423

42

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 421 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 422

Total Unit

Acres:

10.2 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

185

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is an old-growth stand with moderate windthrow, high defect, and a low incidence of mistletoe. 

The over-story of the stand is mainly western hemlock and western redcedar with Sitka spruce, Alaska-cedar and mountain 

hemlock present as lesser components. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3013000.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek. Stream A6 characteristics do not include project-specific, field-verified, information. 

Stream#: 1.1R Class: III Flagging: O/W C- Type: HCD

Concerns: blowdown present and bank erosion

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A6 Class: III Flagging: O/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class III for HCL to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

Unit

Number 422 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 422

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 25% to 40%. The entire 10-acre unit is forested wetland (BMP 12.5). A minimum of partial suspension 

would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU, however 

there are no requirements for this unit because it is less than 20 acres.

Alternative 4: Unit dropped because location coincides with biologically preferred OGR.
LAKE A1

3013000

3013200

3013100

1.1R.6R

1.1R.4R

1.1R.7R

1.1R.5R

84-1.1R.1R

A6

A4

87-1.1R

1.1 R

1.1R.1R

1.1R.3L

A7

1.1R .1 L

2

1

A1

1.1R.3R

1.1R.2R

1.1R.9R

1.1R.8R

1.1R.2 L

A5

1.1R

1989

1992

1989

1989

43

44

420

421

422

423

42

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 422 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 423

Total Unit

Acres:

22.9 Prescription: Clearcut

VCU

Number:

597.

2

Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

337

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 423 is mainly a western hemlock and western redcedar old-growth stand. Sitka Spruce and Alaskacedar are present as lesser components. The unit has moderate windthrow, moderate defect, and low evidence of mistletoe. 

All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of stem decay resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 10 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG on the east side of the unit along the Class 1 TTRA that borders the unit, and building off RMA along south border at 

east and west ends, providing RAW. These POG blocks also eliminate the need for greater oad length. Total mapped 

legacy is approximately 10 acres. Any adjustments to the planned unit during implementation must consider the planned 

acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of cable and helicopter yarding. Helicopter settings are planned for yarding to landings 

on the proposed temporary road. Cable settings are planned for uphill and downhill yarding to landings on the proposed 

temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1600 feet, as displayed on the unit card. Approximately 900 feet of 

this road will be constructed across decomissioned road beds.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Goose Creek (Stream characteristics do not include project-specific, field-verified, information). 

Stream#: A7 Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B 

Stream#: A4 Class: I Flagging: B/W C- Type: LCM

Concerns: none known

Buffer (RMA): Class I for LCM greater of 100 feet or to the top of the side-slope break. 

Unit

Number 423 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 423

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A

Stream#: A6 Class: I, III Flagging: B/W, O/W C- Type: HCL

Concerns: none known

Buffer (RMA): Class I for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL to the top of the 

side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Temporary roads (new and reopened decommissioned) for Unit 423: Alternative3 -- No known stream crossings. The 

temporary roads have not been field verified and will be surveyed before implementation. If any stream crossings are found, 

crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to 

construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 

14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. There are less than 2 acres of slopes greater than 72% mapped in the unit 

that are suitable for harvest with partial suspension requirements. Approximately 3/4 of the unit) is forested wetland (all but 

the northern portion of the unit) (BMP 12.5). A minimum of partial suspension would meet soil and wetland resource 

concerns (BMPs 12.5, 13.5, and 13.9).

A temporary road will impact about 1/2 acre of forested wetland within the unit and less than 1/4 acre outside the unit. 

Wetland avoidance was not practicable due to the location of existing roads, topography, and the extent of wetlands in the 

area, there was not another way to provide road access with less impact (BMP 12.5, 13.2). Provide adequate cross 

drainage, remove structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Legacy standard and guideline applies in this VCU; positioning of 

Legacy acres covers some deer winter range. 

Alternative 4: Unit dropped because location coincides with biologically preferred small OGR.
3013155

3013150

3013000

3013154

1.1R.4R

1.1 R

1.1R.1R

2

1

A1

1.1R.2R

A7

1.1R

84-1.1R.1R

87-1.1R

A6

A5

A4

1989

1991

1989

2007

1989

42

420

421

422

423

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 423 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

597.2

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 424

Total Unit

Acres:

19.8 Prescription: Clearcut

VCU

Number:

579 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

656

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit has mainly old-growth stand structure. There is an area with heavy past wind damage in the 

center of the unit has a more two-age structure. High windthrow, moderate to high defect, and high incidence of mistletoe 

were noted in the stand. The over-story of the stand is mainly western hemlock and western redcedar with Sitka spruce 

present as a lesser component. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of stem decay resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 9 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG along the north side of unit along the Class 1 & 2 TTRAs that border unit (providing RAW), as well as in the 

southwest and west corners of unit. These POG blocks reduce the required road length needed for harvest. Total mapped 

legacy is approximately 9 acres. Any adjustments to the planned unit during implementation must consider the planned 

acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill cable yarding to landings on the proposed temporary road.

Unit is adjacent to small OGR.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1,000 feet, as displayed on the unit card.

 BOTANY:

One small population of Platanthera (Sensitive species) in TTRA buffer, over 300 ft from nearest harvest.

 FISHERIES:

Streams are tributaries to Thorne River. Some stream characteristics do not include project-specific, field-verified, 

information. 

Stream#: 2.5L.5R.1R Class: I Flagging: B/W C- Type: MMO

Concerns: blowdown present

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 2.5L.5R.2R Class: I Flagging: B/W C- Type: MMO

Concerns: blowdown present

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

Unit

Number 424 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 424

fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: A2.5L.5R Class: III Flagging: O/W C- Type: HCO

Concerns: none known

Buffer (RMA): Class III for HCO to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Temporary roads for Unit 424: Alternative3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20% to 50%. There are no slopes greater than 72% mapped in the unit. A minimum of partial 

suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped 

in the unit.

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (western portion and eastern edge of unit), some of which is also deep snow 

marten habitat/deer winter range (western portion unit). Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3 (unit is adjacent to small OGR on its north, east, and south sides). Legacy standard and guideline applies in 

this VCU; positioning of Legacy acres covers some deer winter range and marten habitat.
3015300

3015000

3015105

2.5 L.7R

2.5L.8R

2.5L.5R.2L

2

2. 5L.4R.1L

2.5L.9 R

2.5L.8R

A2.5L.5R

2.5L.3R

2.5L.4R

2.5L.6R

2.5L.5 R

2.5L.5R.1 R

1974

1972

1990

1990

1988

1990

1990

1975

83

84

424

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 424 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

579

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 426

Total Unit

Acres:

10.2 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

156

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 426 is a low productivity western Hemlock and western redcedar stand with old-growth stand 

structure. High windthrow, high defect, and light evidence of mistletoe were noted. The lowest productivity patches in the 

unit, usually occurring on poorly drained flats and rocky knobs, are stocked with small diameter Alaska-cedar. These trees 

are mostly dead due to decline and of little to no value. Most of the larger diameter western redcedar in the overstory are 

cull. The unit is a narrow strip of marginal value timber located between the beach buffer and the property boundary with the 

State of Alaska. Large areas of recent harvest not yet regenerated have occurred on adjacent State lands.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of windthrow and defect resulting in a situation where stand 

growth is being offset by decay and mortaltiy. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

Unit is adjacent to State lands on the west and a small OGR on the east.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 1,400 feet, as displayed on the unit card. Road is constructed from 

the existing State road and shall be designed to minimize impacts the State lands.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Snug Anchorage. 

All streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 426: Alternative3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 426 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 426

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Moderate SIO and is adjacent to Unit 427 for a combined total of 14 acres. These units form a long and 

narrow (maximum of 300 ft wide) opening that is parallel to the contours. The viewing area of concern is the saltwater use 

area to the east of the units. However, because of topographic and vegetative screening it is estimated that about 10 acres 

or less would be visible from any location, which is within the range of approximate opening sizes identified in the Forest Plan 

for Moderate SIO areas with Low VAC.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 15 to 25%. There are no slopes greater than 72% mapped in the unit. The soils and wetlands are suitable 

for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting. No wetlands have been mapped in the unit. 

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range, 

and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3 (unit is outside of but adjacent to the new OGR on its east, north, and south sides). Legacy standard and 

guideline applies in this VCU, however there are no requirements for this unit because it is less than 20 acres.
3000145

1.1L

24

1

25

23.1L

23

2

21

1

1

22

426

427

428

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 426 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 427

Total Unit

Acres:

3.6 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

69

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is a western hemlock and western redcedar stand with old-growth stand structure. High 

windthrow, high defect, and a light evidence of mistletoe were noted in the stand. The over-story of the stand is mainly 

western hemlock and western redcedar with Alaska-cedar present as a lesser component. The western boundary of the unit 

is along the State of Alaska land border. No past harvest areas are adjacent to the unit.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed NFS road 3000145.

Unit is adjacent to State lands on the west and a small OGR on the east.

 ENGINEERING/ROADS:

Unit is accessed by a portion of proposed NFS road 3000145 in Alternative 3, totaling 900 feet, as displayed on the unit card. 

This road is also used to access Units 428-431. See road card for detailed information on the proposed NFS road. This unit 

will require hauling and road construction across state lands. Road design should be completed to minimize impacts on state 

lands.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Snug Anchorage. 

Stream#: 23 Class: III , IV Flagging: O/W, G/W C- Type: HCL, HCO

Concerns: blowdown in class IV reach

Buffer (RMA): Class III for HCL to the top of the side-slope break. Class IV for HCO none. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C

All other streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 427 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 427

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Moderate SIO and is adjacent to Unit 426 for a combined total of 14 acres. These units form a long and 

narrow (maximum of 300 ft wide) opening that is parallel to the contours. The viewing area of concern is the saltwater use 

area to the east of the units. However, because of topographic and vegetative screening it is estimated that about 10 acres 

or less would be visible from any location, which is within the range of approximate opening sizes identified in the Forest Plan 

for Moderate SIO areas with Low VAC.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 15 to 25%. There are no slopes greater than 72% mapped in the unit. The soils and wetlands are suitable 

for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range, 

and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3 (unit is adjacent to the new OGR to its east and south sides). Legacy standard and guideline applies in this 

VCU, however there are no requirements for this unit because it is less than 20 acres.
3000145

2R.1L

24

25

21.1R

23.1L

23

21.1L

21

21.1L

LAKE A1

22

426

427

428

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 427 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 428

Total Unit

Acres:

59.0 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

1,454

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 428 is predominantly a western redcedar and western hemlock old growth stand. Alaska-cedar 

occurs in the stand on low productivity poorly drained areas. Sitka spruce are scattered. Alaska cedar decline is prominent 

where the species exists in the unit. Mistletoe was rated moderate, windthrow risk is high. Physical defects were rated low but 

stem decay was moderate. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of stem decay resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 27 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely, based on the original area of 

Unit 428 (90 acres). However, Units 428, 429, and 430 were originally connected as one 150-acre opening. Therefore, 

legacy is placed to satisfy the legacy requirements of the combined opening, which is 45 acres. For Unit 428, legacy was 

placed to block up POG, building off TTRA/RMA buffers to provide wider riparian corridors and RAW, to reduce visible 

opening sizes from saltwater use areas, and to avoid conflicts with logging systems and roads. Legacy along east and 

southeast sides was also placed to reduce road length. Legacy between units 428 and 430 is also designed to divide the 

opening created by these two units into two smaller openings. Total mapped legacy within this unit is approximately 31 

acres, which contributes to 45 combined acres for the three adjacent units. Any adjustments to the planned unit during 

implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Shovel settings are planned for yarding to the proposed 

NFS roads 3000145, 3000147, and proposed temporary roads. Cable settings are planned for uphill and downhill yarding to 

landings on the proposed NFS road 3000145 and proposed temporary roads.

Unit boundary is adjacent to new location for small OGR on the north.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS roads 3000145 and 3000147, totaling 7900 feet. Proposed NFS road 3000145 is also 

used to access Units 427, 429, 430, and 431. See corresponding road card for detailed information. Unit is accessed by a 

proposed temporary road, totaling 700 feet, as displayed on the unit card. This unit will require hauling and road construction 

across state lands. Road design should be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 428 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 428

Streams drain to Snug Anchorage. 

Stream#: 22 Class: II Flagging: B/W C- Type: HCL

Concerns: blowdown present

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A

Stream#: 21 Class: II, III, IV Flagging: B/W, O/W, G/W C- Type: HCL, HCD, HCO

Concerns: blowdown present in Class IV section, fresh channel erosion, scour and bedload transport, debris piles, and loose 

mobile bank soils

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCD to the top of the 

side-slope break. Class IV HCO none.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A, B and C 

Stream#: 21.1L Class: II Flagging: B/W C- Type: HCL

Concerns: none

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 21.1R Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C

Stream#: 50.2R.1L Class: I, IV Flagging: B/W, G/W C- Type: HCO

Concerns: blowdown and bank erosion in Class I portion of stream. 

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: Lake- A1 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 428: Alternative 3 -- One Class IV stream crossing. The temporary roads have not been field 

verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has approximately 12 acres mapped as Moderate SIO and 47 acres mapped as Very Low SIO. The viewing area of 

concern is the saltwater use area to the north and east of unit. However, because of topographic and vegetative screening it 

is estimated that about 10 acres or less would be visible from any location, which is within the range of approximate opening 

sizes identified in the Forest Plan for Moderate SIO areas with Low VAC.
Unit 428

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about level to about 50%. There are no slopes greater than 72% mapped in the unit. The soils and wetlands are 

suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 

13.9. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. No wetlands have been mapped in 

the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (entire unit except northern edge), and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 

Forest Plan OGR, which is modified under Alternative 3 (unit is outside of but adjacent to the new OGR). Legacy standard 

and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and marten habitat.
3000147

3000145

50.A

23.1L

50.6R

50.1R

21.1R

50

50.2 R.1L

50.2 R

2 1.1L

50.5R

50

2 1

A50.5R

A50.4R

21.1L

LAKE A1

22

1967

427

428

429

430

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 428 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 429

Total Unit

Acres:

10.9 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

302

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is old-growth timber made up mainly of western hemlock, western redcedar and scattered 

Sitka Spruce. Alaska-cedar occurs throughout the stand but is primarily found were drainage is restricted. Windthrow risk is 

moderate to high, with some blowdown evident both in the stand and at the stand edges. Topographic exposure to storm 

winds is high. State land is to the west. No past harvest areas are adjacent to this unit. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 6 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely, based on the original area of 

Unit 429 (14 acres). However, Units 428, 429, and 430 were originally connected as one 150-acre opening. Therefore, 

legacy is placed to satisfy the legacy requirements of the combined opening, which is 45 acres. For Unit 429, legacy was 

placed to block up POG and avoid conflicts with logging systems and roads. Total mapped legacy within this unit is 

approximately 3 acres, which contributes to 45 combined acres for the three adjacent units. Any adjustments to the planned 

unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

Unit is adjacent to state lands to the west, but separated by legacy.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000145, totaling 7900 feet. This road is also used to access Units 427, 428, 430, 

and 431. See corresponding road card for detailed information. Unit is accessed by a proposed temporary road, totaling 500 

feet, as displayed on the unit card. This road is also used to access Unit 428. This unit will require hauling and road 

construction across state lands. Road design should be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 429 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 429

Streams drain to Clarence Strait. 

Stream#: 50 Class: I, II Flagging: B/W C- Type: MMS, HCD

Concerns: blowdown present

Buffer (RMA): Class I and II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class I for HCD greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A

All other streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 429: Alternative 3 -- One Class IV stream crossing. The temporary roads have not been field 

verified and will be surveyed before implementation. Crossings structures and locations will be approved by USFS, in 

consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads 

implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 10 to 40%. There are no slopes greater than 72% mapped in the unit. The soils and wetlands are suitable 

for shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting. No wetlands have been mapped in the unit. 

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range, 

and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3 (unit is outside of the new OGR, being separated only by Legacy). Legacy standard and guideline applies in this 

VCU; positioning of Legacy acres covers some deer winter range and marten habitat.
3000146

3000145

3000147

50.A

50.6R

50.4L

21

50

21.1R

50.4L

50.2R.1L

LAKE A2

50

21.1L

50.20L

50.3R

50 2. 0L.1R

50 .5R

50

A50.5R

50.4L.1L

50.2 R

50

LAKE A1

A50.4R

21.1L

LAKE A1

50.1R

431

429

430

428

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 429 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 430

Total Unit

Acres:

35.7 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

649

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 430 is predominantly a western redcedar and western hemlock old growth stand with scattered 

Sitka spruce and patches of Alaska-cedar. Mistletoe, defect and windthrow were all rated moderate. No past harvest areas 

are adjacent to this unit. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of stem decay resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 14 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely, based on the original area of 

Unit 430 (46 acres). However, Units 428, 429, and 430 were originally connected as one 150-acre opening. Therefore, 

legacy is placed to satisfy the legacy requirements of the combined opening, which is 45 acres. For Unit 430, legacy was 

placed to block up POG, build off TTRA/RMA buffers, and avoid conflicts with logging systems and roads. Legacy between 

units 428 and 430 is also designed to divide the opening created by these two units into two smaller openings. Total mapped 

legacy within this unit is approximately 10 acres, which contributes to 45 combined acres for the three adjacent units. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of helicopter and cable yarding. Helicopter settings are planned for yarding to landings 

on the proposed temporary road. Cable settings are planned for uphill yarding to landings on the proposed temporary road.

Unit is adjacent to a relocated OGR on east end and is iadjacent to state lands to the west, but is separated by legacy..

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000145, totaling 8,400 feet. This road is also used to access Units 427, 428, and 

430. See corresponding road card for detailed information.This unit will require hauling and road construction across state 

lands. Road design should be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 430 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 430

Streams drain to Clarence Strait. Lakes were thought to be saltwater in the Forest Plan, but were found to be freshwater 

during field verification; as a result, the beach buffer has changed.

Stream#: Lake- A2 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A2 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: Lake- A1 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 50 Class: I Flagging: B/W C- Type: PAB, PAS, MMS

Concerns: none

Buffer (RMA): Class I - greater of 100 feet (PAB and PAS) or 120 feet (MMS), flood plain, riparian vegetation or soils, or 

riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C-Type: HC or MM 

Buffer (RMA): none	Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 430: One Class IV stream crossing. The temporary roads have not been field verified and will be 

surveyed before implementation. Crossings structures and locations will be approved by USFS, in consultation with fisheries 

biologist or hydrologist, prior to construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 

13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 10 to 40%. There are no slopes greater than 72% mapped in the unit. A minimum of partial suspension 

would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit. 

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (eastern portion of unit), and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan 

OGR, which is modified under Alternative 3 (unit is outside of, but adjacent to OGR on east end). Legacy standard and 

guideline applies in this VCU; positioning of Legacy acres covers some deer winter range and marten habitat.
3000145

3000147

21

50.A

50.6R

50.4L

50

50.1R

50.4L

50.2R.1L

LAKE A2

50.20L

50

50.2R

21.1L

21.1L

50.3R

50 2. 0L.1R

50 .5R

50

A50.5R

50.4L.1L

50

LAKE A1

A50.4R

21.1R

430

429

431

428

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 430 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 431

Total Unit

Acres:

67.7 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

1,330

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 431 is a lower elevation, mixed species old growth stand. Areas of the stand are trending toward 

two-age structure due to heavy decay and resulting breakage in the overstory hemlock. The over-story of the stand is a mix 

of western hemlock and redcedar with scattered Sitka spruce and patchy Alaska-cedar. Mistletoe is high, defects are high 

and wind risk was rated high as well. State land is along the southern boundary. There are no adjacent past harvest areas. .

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of stem decay resulting in a situation where stand growth is 

being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post harvest, 

promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 30 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, to coincide with areas dropped for RMA and heritage concerns, to build off TTRA/RMA buffers on streams to the 

south and the lake on the NW to provide RAW, to avoid conflicts with logging systems and roads, to coincide with areas 

dropped for RMA and heritage concerns, and to reduce overall road lengths to the northeast and southeast. Total mapped 

legacy is approximately 31 acres. Any adjustments to the planned unit during implementation must consider the planned 

acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of cable and shovel yarding. Cable settings are planned for uphill and downhill yarding 

to the proposed NFS road 3000145 and the proposed temporary road. Shovel settings are planned for yarding to the 

proposed NFS road 3000145 and the proposed temporary road.

Unit is adjacent to state lands on the south and west and to the new OGR location to the east.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000145, totaling 12,900 feet. This road is also used to access Units 427-430. See 

corresponding road card for detailed information. Unit is also accessed by a proposed temporary road, totaling 600 feet, as 

displayed on the unit card. This unit will require hauling and road construction across state lands. Road design should be 

completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 431 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 431

Streams drain to Clarence Strait. 

Stream#: Lake- A2 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A2 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: Lake- A1 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: 50 Class: I Flagging: B/W C- Type: PAS, MMS

Concerns: none

Buffer (RMA): Class I - greater of 100 feet (PAS) or 120 feet (MMS), flood plain, riparian vegetation or soils, or riparian 

associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: 50.4L.1L Class: I Flagging: B/W C- Type: HCO

Concerns: blowdown present

Buffer (RMA): Class I for HCO greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 50.20L Class: I, IV Flagging: B/W, G/W C- Type: MMO, HCO

Concerns: blowdown present

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCO none

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance. The 

physical boundaries of this unit are not to be modified without input from a Forest Service Heritage specialist.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 5 to 35%. There are no slopes greater than 72% mapped in the unit. The soils and wetlands are suitable for 

a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes 

over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving 

shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. No wetlands have been mapped in the unit. 

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.
Unit 431

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range, 

and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3 (unit is outside of, but adjacent to OGR on east end). Legacy standard and guideline applies in this VCU; 

positioning of Legacy acres covers some deer winter range and marten habitat.
3000147

3000145

50.A

50.6R

50.4L

A50.5

50

50.1R

50.4L

50

A50.4R

LAKE A2

50.20L

50

50.2R

50. 3R

50 2. 0L.1R

50.5R

50.2R.1L

50.4L.1L

50

50.2R

LAKE A1

1973

1950

1950

428

429

430

431

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 431 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 433

Total Unit

Acres:

2.1 Prescription: Clearcut

VCU

Number:

586 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

33

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 433 is predominantly an over-mature, average defect western hemlock and western redcedar stand 

with scattered Sitka spruce. Old-growth stand structure dominates. Stem decay and broken tops were the most common 

damages observed. Mistletoe was rated light, defect and decay were moderate and windthrow hazard was moderate. State 

land is just to the west. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed NFS road 3000144.

Unit is adjacent to state lands to the west and TTRA on the north and east and the OGR boundary to the south.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000144, totaling 1300 feet. This road is also used to access Units 434 and 435. 

See corresponding road card for detailed information. This unit will require hauling and road construction across state lands. 

Road design should be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Snug Anchorage. 

Stream#: 1.1L Class: I Flagging: B/W C- Type: HCL, MMS, MCS

Concerns: none

Buffer (RMA): Class I for HCL and MCS greater of 100 feet or the side-slope break. Class I for MMS greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

Unit

Number 433 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 433

 SCENERY:

Unit is mapped as Very Low SIO. No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. The soils and wetlands are suitable for shovel yarding. Shovel yarding should follow 

BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture 

conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. No 

wetlands have been mapped in the unit.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is within 2008 Forest Plan OGR, which is modified under Alternative 3 so that unit is outside of, but adjacent to OGR to 

the south . Legacy standard and guideline applies in this VCU, however there are no requirements for this unit because it is 

less than 20 acres.
State Road

3000144

1.1L.1R

1.1L.1R. 2L

1.1L.1R.1 R

1.1L .1

R. 1 R .1L

1.1L. 1R 2. R

2

1 .1L .1R.1L

1.1L

2 .1L

3

1.1L.1R

1.1L

1.1L.1R .1R.1R

1

1

426

433

434

435

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 433 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 434

Total Unit

Acres:

18.5 Prescription: Clearcut

VCU

Number:

585,

 586

Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

570

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is a western hemlock and western redcedar stand with old-growth structure. Sitka spruce and 

Alaska-cedar occur as lesser components. Minor windthrow, moderate defect, and patchy mistletoe were found in the stand. 

Mistletoe was noted as heavy in the southeastern corner of the unit. Little mistletoe was seen elsewhere. There are no 

adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in these VCU's; however, the unit is less than 20 acres, therefore no legacy set-aside 

is required.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding to the 

proposed NFS road 3000144. Helicopter settings are planned for yarding to landings on the proposed NFS road 3000144.

Unit is adjacent to relocated OGR to the south and across buffer to the east.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000144, totaling 2,400 feet. This road is also used to access Units 433 and 435. 

See corresponding road card for detailed information. This unit will require hauling and road construction across state lands. 

Road design would be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Snug Anchorage and Clarence Strait. 

Stream#: 1.1L Class: I Flagging: B/W C- Type: HCL, MMS

Concerns: none

Buffer (RMA): Class I for HCL greater of 100 feet or to the top of the side-slope break. Class I for MMS greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 1.1L.1R Class: I Flagging: B/W C- Type: HCL

Concerns: none

Buffer (RMA): Class I for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Unit

Number 434 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 434

Stream#: 1.1L.1R.1R Class: I, II Flagging: B/W C- Type: HCLw

Concerns: none

Buffer (RMA): Class I and II for HCLw greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A

Stream#: 1.1L.1R.1R.1R Class: II Flagging: B/W C- Type: HCLw

Concerns: none

Buffer (RMA): Class II for HCLw greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category A 

Stream#: 2 Class: I Flagging: B/W C- Type: HCL

Concerns: blowdown present

Buffer (RMA): Class I for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 2.1L Class: I, II Flagging: B/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Very Low SIO. No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. The soils and wetlands are suitable for a minimum partial suspension yarding or 

shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable 

for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% 

gradient. Avoid track slippage and rutting. No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within 2008 Forest Plan OGR, which is modified under 

Alternative 3; unit is outside of, but adjacent to OGR to the south and across buffer to the east. Legacy standard and 

guideline applies in these VCUs, however there are no requirements for this unit because it is less than 20 acres.
3000144

3.1L

1.1L.1R

1.1L.1R. 2L

1.1L.1R.1R

1. 1 L.1 R.1R.1L

1.1L . 1R 2. R

6

2

1 .1L .1R.1L

1.1L

2 .1L

1.1L.1R

1.1L

1.1L. 1R.1R.1R

3

1

1

LAKE A 1

433

434

435

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 434 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585,586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 435

Total Unit

Acres:

32.2 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

578

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 435 is a mixed species stand of over-mature timber. Generally old-growth stand structure 

dominates, however areas with heavy past wind damage in upper elevations have a two-age structure. Patchy, moderate 

windthrow, some very recent was evident in the upper elevations. Moderate defect and patchy moderate to heavy mistletoe 

was found in the stand. The over-story of the stand is mainly western hemlock, western redcedar with Sitka spruce and 

Alaska-cedar present as lesser components. State land with extensive past harvest is to the west. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 14 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, building off TTRA/RMA buffers on streams and lakes to provide RAW and wider corridors, to reduce overall road 

lengths, and to avoid conflicts with logging systems and roads. Total mapped legacy is approximately 14 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Shovel settings are planned for yarding to the proposed 

NFS road 3000144, and proposed temporary roads. Cable settings are planned for yarding to landings on the proposed NFS 

road 3000144.

Unit is adjacent to state lands on the southwest and to the relocated OGR boundary on the north and east.

 ENGINEERING/ROADS:

Unit is accessed by proposed NFS road 3000144, totaling 6,000 feet. This road is also used to access Units 433 and 434. 

See corresponding road card for detailed information. This unit is also accessed by two proposed temporary road, totaling 

600 feet, as displayed on the unit card. This unit will require hauling and road construction across state lands. Road design 

should be completed to minimize impacts on state lands.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 435 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 435

Streams drain to Snug Anchorage and Clarence Strait. 

Stream#: 1.1L.1R Class: II, IV Flagging: B/W, G/W C- Type: HCLw, HCO

Concerns: none

Buffer (RMA): Class II for HCLw greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 1.1L.1R.1R Class: II, IV Flagging: B/W, G/W C- Type: HCL, HCO

Concerns: none

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 1.1L.1R.1R.1R Class: II Flagging: B/W C- Type: HCL

Concerns: none

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 1.1L.1R.1R.1L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or ot the top of the the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 3 Class: II Flagging: B/W C- Type: MMS

Concerns: none

Buffer (RMA): Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 3.1L Class: II Flagging: B/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 	Buffer (RAW): no review needed

Protection: Category A 

Stream#: Lake- A1 Class: I Flagging: B/W C- Type: L

Concerns: none

Buffer (RMA): Class I for Lake-A1 greater of 100 horizontal feet or to the extent of flood plain, riparian vegetation or soils, 

riparian associated wetland fens, or height of one site potential tree. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Very Low SIO. No Concerns

 RECREATION:

No Concerns
Unit 435

 SOILS/WETLANDS:

Slopes range from nearly level to about 20%. There are no slopes greater than 72% mapped in the unit. The soils and 

wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 

12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. 

Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting. No wetlands have 

been mapped in the unit.

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western half of unit), and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan 

OGR, which is modified under Alternative 3; unit is outside of but adjacent to the OGR. Legacy standard and guideline 

applies in this VCU; positioning of legacy acres covers some deer winter range and marten habitat.
3000144

3.1L

1.1L.1R

1.1L.1R. 2L

5

4

1.1L.1R.1 R

1. 1 L.1 R.1R.1L

1.1L. 1R 2. R

6

1.1L

1 .1L .1R.1L

1.1L

2.1L

1.1L.1R

1.1L. 1R.1R.1R

3

2

LAKE A2

LAKE A 1

1973

1969

433

434

435

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 435 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585,586

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 438

Total Unit

Acres:

55.7 Prescription: Clearcut

VCU

Number:

585 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

861

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 438 is a mixed species stand with a mosaic of uneven-age and old growth stand structure. 

Moderate to high windthrow, moderate to light defect and a moderate to high occurrence of mistletoe was found. Volume 

Class 5-6 timber occurs throughout the unit with areas of non-merchantable timber in recent windthrow patches. The 

overstory of the stand is mainly Western Hemlock, Western redcedar and Sitka spruce. The average overstory tree class 

rating is unacceptable except in areas of older even-age structure where the average tree class was acceptable. The primary 

damage in the overstory is stem decay. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 26 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG and screen the majority of unit from NFS road 3000000 and Clarence Strait; legacy also widens buffer above road 

along Salamander Creek. Legacy was also used to help divide unit into four separate openings. Total mapped legacy is 

approximately 33 acres; the excess acreage above the minimum required is added to address visual concerns. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill yarding to landings 

on the southern two proposed temporary roads. Shovel settings are planned for yarding to the northernmost proposed 

temporary road and existing NFS roads 3000000 and 3000153. Some shovel yarding through one visual buffer along road 

3000000 will be necessary. Corridors through the visual buffer will be used to minimize impacts.

 ENGINEERING/ROADS:

Unit is accessed by three proposed temporary roads, totaling 3,500 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A1L Class: I, II Flagging: B/W C- Type: MMS, HCV

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCV greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category A 

Temporary roads for Unit 438: Alternative 3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

Unit

Number 438 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 438

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is primarily in Moderate SIO, with a small amount of Very Low in the north. Legacy areas have been placed to screen or 

reduce visibility from the 3000000 Road and saltwater use areas. Acreage in legacy is greater than the minimum because of 

visual concerns. Legacy was also used to help divide unit into four separate openings. Typical opening sizes identified by 

the Forest Plan for Moderate SIO areas with Intermediate VAC are 15 to 40 acres. Because of the separate openings that 

are spread north to south over 1 mile and topographic and vegetative screening, no more than about 10 to 15 acres of each 

opening are visible and, generally,about two openings can be seen at a time.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15% to greater than 72%, with most slopes around 40%. There are about 2 acres of slopes greater 

than 72% mapped in the unit that are suitable for harvest with partial suspension requirements. There is an area about 2 

acres in size where full suspension is required; this area is immediately west of the proposed temporary road in the center of 

the unit, north of the deferral area. Approximately 3/4 of the unit is covered by forested wetland (most of unit except for 

northwest portion) (BMP 12.5). Outside of the identified areas, the soils and wetlands are suitable for a minimum partial 

suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact 2 acres of forested wetland within the unit, about 1 acre of forested wetland outside the unit, and 

about 1/4 acre of moss muskeg outside the unit. Wetland avoidance was not practicable due to the location of existing 

roads, topography, and the extent of wetlands in the area (BMP 12.5, 13.2). Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (western lobe of unit), and low elevation/high volume POG that is limited in the VCU. Unit is within 2008 Forest Plan 

OGR, which was modified under Alternative 3; unit is adjacent to, but outside of OGR (it is separated by legacy at many other 

locations). Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range 

and marten habitat.
3000160

3000160

3000170

3000153

3000000

11.1R

A1

1965

1966

1973

1991

138

438

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 438 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

585

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 439

Total Unit

Acres:

36.3 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

694

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This unit is comprised of five separate polygons each with productive western hemlock, western 

redcedar along with some scattered Sitka spruce and Alaska-cedar. The areas have old-growth stand structure. Windthrow 

risk is moderate across the stands with only minor indications of past windthrow. Mistletoe occurrence is heavy in the south 

and eastern polygons but low to moderate in the two northwestern polygons. Overall defect is high with primary defects being 

stem decay and weather damage as well as some stem form defect. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

These stands are being recommended for harvest at this time because they are not expected to obtain the desired condition 

given the current growth trajectory. The stands are mature with high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

A Tongass Wide Young Growth Study site (POW Thorne River #3) is along the 3015000 road to the northeast of the unit and 

may coincide with potential helicopter landing zones. Protection of this site is required. Contact the Forestry Sciences Lab in 

Juneau for additional information.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS roads 3015000 and 3016015.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

Unit indirectly affects an Alaska rein orchid (sensitive plant) population (8 individuals), located in the northern corner of the 

northern polygon. This 0.05-ac corner of unit was dropped to totally avoid direct effects to population, with only an 

insignificant affect on the unit size. A western meadowrue (rare plant) population occurs about 30 ft west of the northen 

polygon boundary and could be indirectly affected.

 FISHERIES:

Streams are tributaries to Thorne River (Stream characteristics do not include project-specific, field-verified, information). 

Stream#: 1 Class: I Flagging: B/W C- Type: FPL

Concerns: none known

Buffer (RMA): Class I for FPL greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: A1 Class: I Flagging: B/W C- Type: FPL

Concerns: none known

Buffer (RMA): Class I for FPL greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Unit

Number 439 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 439

Protection: Category A

Stream#: A1.2L Class: I Flagging: B/W C- Type: PAB

Concerns: none known

Buffer (RMA): Class I for PAB greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: A1.1L Class: I Flagging: B/W C- Type: PAS

Concerns: none known

Buffer (RMA): Class I for PAS greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A1.1L.1R Class: I, III Flagging: B/W, O/W C- Type: PAS, PAB

Concerns: none known

Buffer (RMA): Class I for PAS greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for PAB consider no or limited harvest areas.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. Approximately 2/3 of unit is forested wetland (mostly in northern polygons). A 

minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (west/central setting). Unit within the 2008 Forest Plan OGR, which was modified under Alternative 3, and is located in 

an area that connects the Honker large OGR with the beach fringe near Sal Creek. Legacy standard and guideline does not 

apply in this VCU.
3015000

A2.2R

A2

A2.2L

A1.1L

1.2L

A2.1L

A1.1L.1R

A1.2L

1

A2

A1

1975

1988

1998

1976

1988

439

440

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 439 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 440

Total Unit

Acres:

78.4 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

1,902

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 440 is a western hemlock and western redcedar stand that changes to near pure western hemlock 

in the far southwestern point of the unit. Old-growth stand structure dominates the area. Minor windthrow, moderate defect, 

and a high incidence of mistletoe define the stand. All adjacent past harvest areas have regeneration at least 5 feet tall, 

meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

A Tongass Wide Young Growth Study site (POW Thorne River #3) is along the southeast boundary. Protection of this site is 

required. Contact the Forestry Sciences Lab in Juneau for additional information.

 TIMBER/LOGGING:

This unit is planned for a combination of cable, helicopter, and shovel yarding. This unit includes two separate polygons. 

The western polygon is mostly shovel, but includes some cable yarding. The northeast polygon includes shovel, cable, and 

helicopter. Shovel settings are planned for yarding to the existing NFS road 3015000 and the proposed temporary road. 

Cable settings are planned for downhill yarding to landings on the existing NFS road 3015000 and the proposed temporary 

road. Helicopter settings are planned for yarding to landings on the existing NFS road 3015000.

Northeast polygon shares its long western border with the modified OGR boundary.

 ENGINEERING/ROADS:

The northeast polygon of this unit is accessed by a proposed temporary road, totaling 1,800 feet, as displayed on the unit 

card. Approximately 800 feet of this road will be constructed across decomissioned road bed. This road is also used to 

access Units 443 and 444.

 BOTANY:

One lesser round-leaved orchid (sensitive species) population entirely inside southwestern portion of unit. Only one plant 

identified in population; founnd in a small patch of blowdown and likelihood of persistence may be low regardles of harvest 

activities.

 FISHERIES:

Unit

Number 440 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 440

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: 1 Class: I Flagging: B/W C- Type: FPL

Concerns: none known

Buffer (RMA): Class I for FPL greater of 130 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A2.1L Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: none known

Buffer (RMA): . Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B

Stream#: A2.2L Class: I, III Flagging: B/W, O/W C- Type: AMF, HCD

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. Class III for HCD to the top of the sideslope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B

Temporary roads (new and reopened decommissioned) for Unit 440: One Class I stream crossings. The temporary roads 

have not been field verified and will be surveyed before implementation. Crossing structures and locations will be approved 

by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). The Class I crossing will be 

designed to provide fish passage, using a log culvert or bridge, will be installed under current timing constrictions and 

concurrence from the State will be solicited prior to starting the work. During construction of temporary roads implement 

BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are about 15 to 22%. There are no slopes greater than 72% mapped in the unit. About 1 acre was excluded due to 

very high landslide potential, active and historic landslides, colluvial activity, steep wet slopes, and unstable drainages. More 

than 90% of unit is forested wetland (BMP 12.5). In the remainder of the unit, the soils and wetlands are suitable for a 

minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Slopes 

over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving 

shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1 acre of forested wetland within the unit and 1/2 acre of forested wetland outside of the 

unit. The road outside the unit will also be used for access to units 443 and 444. Wetland avoidance was not practicable due 

to the extent of wetlands in the area (BMP 12.5, 13.2). Provide adequate cross drainage, remove structures, and close the 

road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within the 2008 Forest Plan OGR, which was moved under 

Alternative 3, and is located in an area that connects the Honker large OGR with saltwater near Sal Creek. Legacy standard 

and guideline does not apply in this VCU.
3015000

2L

1

A2.2L 1. R

4

4.1R

A2

A2

24.1R

A2.2L

3

27

1

1

A2.1L

26

24

2

A2.2L

2 5

A2.2 L

1976

1992

1980

1975

1988

104

439

440

441

443

444

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 440 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 441

Total Unit

Acres:

4.7 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

57

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 441 is predominantly a poorly stocked, over-mature, high defect western hemlock and western 

redcedar stand. Old-growth stand structure dominates. The over-story of the stand is mainly redcedar and western hemlock 

with Sitka spruce and Alaska-cedar present as lesser components. Alaska-cedar occurs primarily in the lower productivity 

areas that split the unit. Mistletoe and windthrow were rated low. All adjacent past harvest areas have regeneration at least 5 

feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible.

A Tongass Wide Young Growth Study site (POW Thorne River #3) is along the south, east and west boundary. Protection of 

this site is required. Contact the Forestry Sciences Lab in Juneau for additional information.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road. The unit consists of two polygons separated by a 

strip of non-merchantable timber. Yarding will occur through corridors in the non-merchantable timber to access the 

proposed temporary road from the eastern setting.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 400 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2.2L Class: I Flagging: B/W C- Type: AMF

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Temporary roads (new and reopened decommissioned) for Unit 441: Alternative 3 -- No known stream crossings. The 

temporary roads have not been field verified and will be surveyed before implementation. If any stream crossings are found, 

crossings structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to 

construction (BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 

14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 441 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 441

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. The entire unit is forested wetland (BMP 12.5). The soils and wetlands are suitable for 

shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

A temporary road will impact approximately 1/2 acre of forested wetland within the unit and about 1/4 acre of forested 

wetland outside the unit. Wetland avoidance was not practicable due to the extent of wetlands in the area (BMP 12.5, 13.2). 

Sufficient cross drainage must be provided for temporary roads. Provide adequate cross drainage, remove structures, and 

close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit within the 2008 Forest Plan OGR, which was modified under 

Alternative 3, and is located in an area that connects the Honker large OGR with saltwater near Sal Creek. Legacy standard 

and guideline does not apply in this VCU.
3015600

3015000

A2.1L

A2

A2

A2.3L

A2.2L

1990

1992

1992

1975

1988

1976

1988

439

440

441

443

444

446

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 441 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 443

Total Unit

Acres:

2.9 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Shovel

Net Harvest

Volume

(MBF):

76

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 443 is a western hemlock and western redcedar stand with old growth structure. Alaska-cedar is 

present in the southern half of the unit. Low to moderate windthrow, moderate to high defect and a low to moderate 

occurrence of mistletoe was found. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for shovel yarding to the proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 2400 feet, as displayed on the unit card. Approximately 800 feet of 

this road will be constructed across decommissioned road bed. This road is also used to access Units 440 and 444.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2.2L Class: I, III Flagging: B/W, O/W C- Type: AMF, HCD

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. Class III for HCD to the top of the sideslope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B

Temporary roads (new and reopened decommissioned) for Unit 443: Alternative 3 -- One Class I stream crossings. The 

temporary roads have not been field verified and will be surveyed before implementation. Unkown fish species occur near 

the proposed Class I crossing. Crossing structures and locations will be approved by USFS, in consultation with fisheries 

biologist or hydrologist, prior to construction (BMP 14.17). The Class I crossing will be designed to provide fish passage, 

using a log culvert or bridge, will be installed under current timing constrictions and concurrence from the State will be 

solicited prior to starting the work. During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, 

and 14.5. Minimize channel disturbance during road construction (BMP 14.14). Control erosion and disperse runoff away 

from streams (BMP 14.8). Upon completion of unit harvest, decommission road, restore natural drainage patterns by 

removing road fill from channels and installing water bar as necessary (BMP 13.16). Ensure natural drainage across road is 

restored beyond fish stream crossing prior to temporary structure removal (BMP 14.20). Seed and fertilize disturbed soil 

adjacent to streams (BMP 12.17).

 GEOLOGY/KARST:

Unit

Number 443 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 443

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. The entire unit is forested wetland (BMP 12.5). The soils and wetlands are suitable for 

shovel yarding. Shovel yarding should follow BMPs 12.5, 13.2 and 13.9. Slopes over 25% gradient may not be suitable for 

shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. 

Avoid track slippage and rutting.

A temporary road will impact about 3/4 acre of forested wetland within the unit and about 1/2 acre of forested wetland outside 

of the unit. The road outside the unit will also be used for access to units 440 and 444. Wetland avoidance was not 

practicable due to the extent of wetlands in the area (BMP 12.5, 13.2). Provide adequate cross drainage, remove structures, 

and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within the 2008 Forest Plan OGR, which was modified 

under Alternative 3, and is located in an area that connects the Honker large OGR with saltwater near Sal Creek. 2011 

Interagency Review Team felt this area would still provide functional connectivity due to the nature of the land. Legacy 

standard and guideline does not apply in this VCU.
3015000

A2.2L.1R

A2

A2.1L

A2.3L

A2.2L

A2.2L

A2

1992

1992

1975

1988

440

441

443

444

446

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 443 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 444

Total Unit

Acres:

48.7 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

1,659

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 444 is an old-growth stand comprised of a mixture of western hemlock, western redcedar and 

Alaska-cedar, with a few Sitka spruce in the lowest elevations. Windthrow risk is low in the lower elevations and high in the 

upper elevations of the stand with evidence of past windthrow being common there. Topographic exposure to storm winds is 

high in the upper elevations. Mistletoe was low in the upper elevations and moderate in the lower elevations. The primary 

defect in the overstory is stem decay, but in the upper elevations wind damage is also prevalent. Considerable Alaska-cedar 

decline has occurred in the lower elevations. Most Alaska-cedar are dead. All adjacent past harvest areas have regeneration 

at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

A Tongass Wide Young Growth Study site (POW Thorne River #3) is along the 3015000 road to the southwest of the unit. 

Protection of this site is required. Contact the Forestry Sciences Lab in Juneau for additional information.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

south proposed temporary road. Cable settings are planned for uphill and downhill yarding to landings on the north proposed 

temporary road. Helicopter settings are planned for yarding to landings on the north proposed temporary road.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads, totaling 5,300 feet, as displayed on the unit card. Approximately 3,200 

feet of this road will be constructed across decommissioned road bed. The south proposed temporary road is also used to 

access units 440 and 443. This unit is also accessed by reconstruction of existing NFS road 3015640, totaling 6,800 feet. 

See corresponding road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2.2L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A2.3L Class: I Flagging: B/W C- Type: MMS

Concerns: none known

Buffer (RMA): Class I for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Unit

Number 444 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 444

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Temporary roads (new and reopened decommissioned) and for Unit 444: Alternative 3 --One Class I stream crossings. The 

temporary roads have not been field verified and will be surveyed before implementation. Crossing structures and locations 

will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). The Class 

I crossing will be designed to provide fish passage, using a log culvert or bridge, will be installed under current timing 

constrictions and concurrence from the State will be solicited prior to starting the work. During construction of temporary 

roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5. Minimize channel disturbance during road construction 

(BMP 14.14). Control erosion and disperse runoff away from streams (BMP 14.8). Upon completion of unit harvest, 

decommission road, restore natural drainage patterns by removing road fill from channels and installing water bar as 

necessary (BMP 13.16). Ensure natural drainage across road is restored beyond fish stream crossing prior to temporary 

structure removal (BMP 14.20). Seed and fertilize disturbed soil adjacent to streams (BMP 12.17).

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. About 14 acres were excluded due to steep slopes and debris 

torrents/avalanches. All slopes greater than 72% are in the soil exclusion area. A debris torrent (initiated in 1993) enters into 

the unit in the southeastern lobe that is proposed to be cable yarded. Approximately 1/4 of the unit is forested wetland 

(southern polygon). In the remaining unit, the soils and wetlands are suitable for shovel yarding. Shovel yarding should 

follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to 

prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use 

care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

A temporary road will impact approximately 1/2 acre of forested wetland and 1/4 acre of moss muskeg within the unit and 

about 1/2 acre of forested wetland and 1/4 acre of moss muskeg outside of the unit. The road outside the unit will also be 

used for access to units 440 and 443. Wetland avoidance was not practicable due to the extent of wetlands in the area 

(BMP 12.5, 13.2). Provide adequate cross drainage, remove structures, and close the road after harvest (BMP 14.9) (33 

CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within 2008 Forest Plan OGR, which was modified under 

Alternative 3, and is located in an area that connects the Honker large OGR with the beach fringe near Sal Creek. Modified 

OGR is across RMA from northwestern border. Legacy standard and guideline does not apply in this VCU.
3015640

A2.2L.1R

A2.2L

A2.3L

A2.2L.1R.1R.1L

A2.2L.1R.1R

A2.2L

1976

1976

1976

1992

1992

1975

440 443

444

447

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 444 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 446

Total Unit

Acres:

5.1 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

142

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This stand is old-growth described primarily as moderately-stocked, western hemlock and western 

redcedar with a minor component of Sitka spruce and Alaska-cedar scattered throughout Windthrow risk is low with only 

minor past blowdown evident in the stand. Mistletoe was low in the southeast and moderate in the remainder of the unit. The 

primary defect in the overstory is stem decay. Alaska cedar decline is also present in limited amounts. There are no adjacent 

past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3015600.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

Unit

Number 446 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 446

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. A minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). The entire unit is forested wetland (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is within 2008 Forest Plan OGR, which was modified under Alternative 3, and is located in an area that connects the 

Honker large OGR with saltwater near Sal Creek.
3015630

3015000

3015600

A2.1R

A2

A2.3L

A2.2L

A2.2R

1990

1975

1992

1992

1986

1975 1975

1976

440

441

443

444

446

447

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 446 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 447

Total Unit

Acres:

15.9 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

342

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 447 is a western hemlock and western redcedar stand with old growth structure. Alaska-cedar 

occurs as a minor component. Low windthrow, moderate defect and a low occurrence of mistletoe was found. The larger 

overstory hemlock trees are particularly high defect. All adjacent past harvest areas have regeneration at least 5 feet tall, 

meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding to the existing 

NFS road 3015600. Helicopter settings are planned for yarding to landings on the existing NFS road 3015600.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: A2.2R Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A2.3R Class: I Flagging: B/W C- Type: AFM

Concerns: none known

Buffer (RMA): Class I for AFM greater of 140 feet or active portion of the alluvial fan. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

Unit

Number 447 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 447

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

This unit is located along the North Thorne Falls fishing access route. Recreation use of this site has caused soil erosion 

and vegetation loss. Harvest in this unit would temporarily prevent recreation use along this route, but visitors would likely 

create a new trail to the river following harvest activities.

 SOILS/WETLANDS:

Slopes are generally about 10%. About 90% of the unit is in forested wetland and emergent sedge/forested wetland 

complex. The soils and wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging 

systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas 

of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture 

conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within the 2008 Forest Plan OGR, which was modified 

under Alternative 3, and is located in an area that connects the Honker large OGR with beach fringe near Sal Creek. 

Legacy standard and guideline does not apply in this VCU.
3015600

3015600

3015635

A2.3R

A2

A2.4R

A2.3L

A2.1R

A2

A2.2R

1975

1992

1986

1975

444

446

447

448

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 447 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 448

Total Unit

Acres:

5.4 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Cable, 

Helicopter

Net Harvest

Volume

(MBF):

143

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 448 is predominantly a moderately stocked, over-mature, high defect western hemlock and western 

redcedar stand. Old-growth stand structure dominates. Trees are rough due to heavy stem form defects and stem decay. 

Mistletoe was rated heavy and windthrow risk was rate high. All adjacent past harvest areas have regeneration at least 5 feet 

tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for a combination of cable and helicopter yarding. Cable settings are planned for uphill and downhill 

yarding to landings on the proposed temporary road. Helicopter settings are planned for yarding to landings on the proposed 

temporary road.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 640 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A2.4R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B

Stream#: A2.5R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A2.6R.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2.6R.2R Class: III Flagging: O/W C- Type: HCD

Unit

Number 448 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 448

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Temporary roads for Unit 448: Alternative 3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit is near the Thorne River roadless area.

 SOILS/WETLANDS:

About 17 acres were excluded due to landslides and very steep slopes. In the remainder of the unit, there are no mapped 

slopes greater than 72%. A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 

13.5, and 13.9). No wetlands have been mapped in the unit. 

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is within the 2008 Forest Plan OGR, which was moved under Alternative 3 and is located in an area that connects the 

Honker large OGR with saltwater near Sal Creek. Portion of unit to be harvested is near, but not adjacent to the modified 

OGR
3015600

A2.6R

A2.6R.1R

A2

A2.4R

A2.6R.2R

A2.5R

1976

1975

1975

447

448

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 448 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 450

Total Unit

Acres:

10.8 Prescription: Clearcut

VCU

Number:

580 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

267

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: This high elevation unit consists of old-growth structure comprised of western hemlock, mountain 

hemlock and patchy Alaska-cedar with some well-spaced Sitka spruce and an occasional western redcedar group on better 

drained sites. Windthrow risk was rated moderate due to moderate topographic exposure to storm winds, restricted rooting 

due to wet soils and the past evidence of windthrow in the stand. Mistletoe was light in the unit. The primary defect is heavy 

stem decay with frost cracks and black seams common. All adjacent past harvest areas have regeneration at least 5 feet 

tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3015600.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Thorne River. Stream characteristics do not include project-specific, field-verified, information. 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category B 

Stream#: A2.1L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A3 Class: III Flagging: O/W C- Type: HCM

Unit

Number 450 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 450

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Stream#: A4 Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

North and northeastern boundary of unit are adjacent to the Thore River inventoried roadless area.

 SOILS/WETLANDS:

Slopes range from about 40 to greater than 72%. About 21 acres were excluded due to very steep slopes, wet slopes, 

landslide activity and steep rock outcrops. All slopes greater than 72% are within the soil exclusion area. In the remainder of 

the unit, a minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). 

There are approximately 5 acres of forested wetland in the northern polygon (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is within the 2008 Forest Plan OGR, which was modified 

under Alternative 3, and is now adjacent to the unit on the north and northeast. It is located in an area that connects the 

Honker large OGR with saltwater near Sal Creek. Legacy standard and guideline does not apply in this VCU.
3015600

A4

A3

A2.1L

A2

A1

1986

1990

1976

1992

450

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 450 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

580

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 452

Total Unit

Acres:

20.0 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Cable, 

Shovel, 

Net Harvest

Volume

(MBF):

327

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 452 is predominantly a moderately stocked, over-mature, moderate defect mixed species stand. Oldgrowth stand structure dominates. The over-story of the stand is mainly western hemlock with Sitka spruce, redcedar and 

yellow-cedar present as lesser components. The average over-story tree has moderate stem decay. Mistletoe and 

windthrow risk were rated moderate. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 17 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was entirely placed 

to coincide with areas that were being dropped due to soil concerns and RMAs. Total mapped legacy is approximately 37 

acres. Any adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

proposed temporary road and existing NFS road 3000271. Cable settings are planned for downhill yarding to landings on the 

proposed temporary road and existing NFS road 3000271. Helicopter settings are planned for yarding to landings on the 

proposed temporary road and existing NFS road 3000271.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 600 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 1 Class III Flagging: O/W C- Type: HCM

Concerns: steep side slopes with mobile fine sediment

Buffer (RMA): Class III for HCM to the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 7 Class: II Flagging: B/W C- Type: PAB, MMS, HCL

Concerns: blowdown, with bank erosion middle to downstream area and bank instability present in MMS section

Buffer (RMA): Class II for PAB and HCL greater of 100 feet, flood plain, riparian vegetation or soils, or riparian associated 

wetland fens. Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Unit

Number 452 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 452

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 5 Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: debris accumulation

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

Stream#: 7.4L Class: II, III Flagging: B/W, O/W C- Type: HCO, HCL

Concerns: in class III area steep side slopes mobile fine sediment, shallow bank soils

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break. Class III for HCL to the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: 7.6L Class: II Flagging: B/W C- Type: HCO

Concerns: blowdown present

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 7.6L.1L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 452: Alternative 3 -- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

About 3/4 of unit (15 acres) is in Low SIO and 1/4 is in Very Low. The viewing areas of concern are the 30 Road and 

saltwater use areas. Some of the Low SIO areas are likely not seen from these viewing areas due to topographic and 

vegetative screening. Opening sizes fall well within Forest Plan guidelines.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. About 36 acres were excluded due to steep slopes, saturated slopes, 

landslides and colluvial activity. There are less than 1/4 acre of slopes greater than 72% in the remaining unit that are 

suitable for harvest with partial suspension. In the remainder of the unit, the soils and wetlands are suitable for a minimum 

partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the 

shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not 

be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting. More than 3/4 of the unit is forested wetland (BMP 12.5).

A temporary road will impact about 1/4 acre of forested wetland and 1/2 acre of emergent sedge/forested wetland complex 

within the unit, and about 1/2 acre of emergent sedge/forested wetland complex outside the unit. Wetland avoidance was 
Unit 452

not practicable due to the extent of wetlands in the area (BMP 12.5, 13.2). Provide adequate cross drainage, remove 

structures, and close the road after harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern piece). Unit is located within the 2008 Forest Plan OGR modified under Alternative 3, in a corridor 

connecting the Honker large OGR complex with saltwater near Sal Creek. Legacy standard and guideline applies in this 

VCU; positioning of Legacy acres covers somd deer winter range and marten habitat.
3000271

3000271

3000270

7

7

1

.4L

1.6R

3

2

7.4L.1L

7.6L.1L

7.6L

7

7.4L.1R

1.5L

7

7.5L

7.2R.2R

7.3L

5

7.1L

7.2L.1R

1.3L

7

7.2L

7.2L

7

7.4L

4

7

7.4L

1993

1994

1994

452

454

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 452 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

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Unit 454

Total Unit

Acres:

13.9 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Cable, Shovel,

Helicopter

Net Harvest

Volume

(MBF):

280

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 454 is a western hemlock stand that transitions to western hemlock and Alaska-cedar in the higher 

elevations or where site productivity is limited by poor drainage. Old-growth stand structure dominates. Moderate past 

windthrow, high defect, and a light incidence of mistletoe defines the health of the stand. All adjacent past harvest areas 

have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel, cable, and helicopter yarding. Shovel settings are planned for yarding to the 

south proposed temporary road and existing NFS road 3000271. Cable settings are planned for uphill and downhill yarding to 

landings on the proposed temporary roads. Helicopter settings are planned for yarding to landings on the proposed 

temporary roads.

 ENGINEERING/ROADS:

Unit is accessed by proposed temporary roads in Alternative 3, totaling 800 feet, as displayed on the unit card.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 1 Class: I, II Flagging: B/W C- Type: MMM, HCM 

Concerns: heavy braiding present 

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCM greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1.1L Class: II, IV Flagging: B/W, G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 	 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 1.2L Class: II, IV Flagging: O/W, G/W C- Type: HCO

Concerns: none

Unit

Number 454 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 454

Buffer (RMA): Class III for HCO to the tiop of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 456-1 Class: III Flagging: O/W, G/W C- Type: HCD

Concerns: blowdown, steep side slopes with shallow soils and exposed bedrock, frequent bank erosion.

Buffer (RMA): Class III for HCM and HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

Temporary roads for Unit 454: Alternative 3-- No known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Low SIO because of potential visibility from NFS Road 3000000 and saltwater use areas. Given it's small 

size and the fact that topographic and vegetative screening would reduce the visibile opening to about 10 acres or less, there 

is no concern.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 25 to greater than 72%. About 24 acres were excluded due to very steep slopes, saturated slopes, 

landslides, and erosive soils. There are less than 3 acres of slopes greater than 72% mapped in the remainder of the unit 

that are suitable for harvest. In the remainder of the unit, the soils and wetlands are suitable for a minimum partial 

suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel 

operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be 

suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel yarding on slopes over 

25% gradient. Avoid track slippage and rutting.

A temporary road will impact about 1 acre of emergent sedge/forested wetland within the unit and 1 acre of emergent 

sedge/forested wetland outside of the unit. Wetland avoidance was not practicable due to the extent of wetlands and 

unsuitable soils in the area (BMP 12.5, 13.2).. Provide adequate cross drainage, remove structures, and close the road after 

harvest (BMP 14.9) (33 CFR BMPs 4, 5, 6).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern 2/3 of unit). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3, in a 

corridor connecting the Honker large OGR complex with beach fringe near Sal Creek. Legacy standard and guideline applies 

in this VCU, however there are no requirements for this unit because all settings are less than 20 acres.
3000000

3000271

3000270

1.2L.1R

1

456-1

1.2L.1L.1 L

1.2L.3L

1.2L.1L

1.2L

3.2R

1.2L.1 L

3

1.2L.1R

2

1.2L

1.1L

1.2L.2R.1L

1.2L.1L

1.2L.1R.1L

10

1.6R

1

2.2L

1.5L

1

1.3L

2.1 L

1

1.3L 1 4. R

1.2R

1.1R

2

456 -1

1

1.2L.2R

1993

1994

1994

1993

452

454

455

456

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 454 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 455

Total Unit

Acres:

5.7 Prescription: Clearcut

VCU

Number:

584 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

71

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is a moderately stocked, mature to over-mature, moderate defect western hemlock and 

western redcedar stand. Old-growth stand structure dominates. The over-story of the stand is mainly western hemlock and 

redcedar with scattered Sitka spruce. Windthrow risk is moderate and mistletoe is heavy. A nearby stand to the east meets 

NFMA requirements for no longer being considered an opening.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3000270.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none	Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is mapped as Low SIO because of potential visibility from the 30 Road and saltwater use areas. It's small size and the 

fact that topographic and vegetative screening would reduce the visibile opening to less than 5 acres, there is no concern.

 RECREATION:

No Concerns

Unit

Number 455 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 455

 SOILS/WETLANDS:

Slopes range from nearly level to about 55%. A minimum of partial suspension would meet soil and wetland resource 

concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), nearly all of which is also deer snow marten habitat/deer winter 

range (all except sliver along western edge). Unit is located within the 2008 Forest Plan OGR, which was modified under 

Alternative 3, in a corridor connecting the Honker large OGR complex with saltwater near Sal Creek. Legacy standard and 

guideline applies in this VCU, however there are no requirements for this unit because all settings are less than 20 acres.
3000000

3000270

3000271

1.2L.1R

1.2L

1.2L.1L

456-1

456-1

2.1L

1.2L.1 L 1.2L.1R

1.2L

1.1L

1.2L.2R.1L

1.2L.1R.1L

10

1.2L.3L

1

1.3L

1

1.2R

1

2

1.1R

1.1L

1

1.2L.2R

1993

1993

1994

1993

1994

454

455

456

153

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 455 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 456

Total Unit

Acres:

94.3 Prescription: 25% and 50% 

Removal

VCU

Number:

584 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

1,178

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 456 is predominantly a well-stocked, over-mature, variable defect western hemlock, western 

redcedar and Sitka spruce stand. Yellow-cedar are present as a lessor component. Old-growth stand structure dominates. 

Moderate windthrow, moderate defect and a low occurrence of mistletoe was found. An adjacent stand to the east meets 

NFMA requirements for no longer being considered an opening.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent in the northern 3 settings (9 acres), and 50 percent in the southern 4 settings ((85 acres) of the 

setting pretreatment basal area, based on standing live tree total for the unit, uncut. Individual trees selected for harvest may 

occur in small groups but will generally be evenly distributed across the stand. Any small groups will usually be less than one 

acre but may occasionally go up to two acres in size where needed to address insect and disease issues or capitalize on 

existing advanced regeneration of desirable tree species. Trees selected for harvest will generally be well distributed and no 

large openings will occur as a result of the harvest. Review the marking guides and silvicultural prescription for more detailed 

information and direction regarding how to implement this prescription.

No legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the proposed temporary roads accessing Units 454 and 457.

 ENGINEERING/ROADS:

Unit utilizes proposed temporary roads constructed for Units 454 and 457, totaling 1,900 feet, as displayed on the unit card 

for those units. Approximately 1,700 feet of the roads will be constructed across decommissioned road beds.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. 

Stream#: 456-1 Class: III Flagging: O/W C- Type: HCD

Concerns: blowdown, frequent bank erosion, shallow bank soils

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 456-1.2L Class: III, IV Flagging: O/W, G/W C- Type: AFH, HCD, HCM, HCO

Concerns: blowdown, frequent bank erosion and fine sediment 

Buffer (RMA): Class III for AFH greater of 140 feet or active portion of allucial fan. Class III for HCD and HCM to the top of 

the side-slope break. Class IV for HCO none

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 456-1.2L.1L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCM, HCO

Concerns: blowdown, steep exposed banks with bedrock, frequent bank erosion

Unit

Number 456 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 456

Buffer (RMA): Class III for HCD and HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C

Stream#: 456-1.2L.1L.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: blowdown, frequent bank erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 456-1.2L.1R Class: III Flagging: O/W C- Type: HCL

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 456-1.2L.2R Class: III Flagging: O/W C- Type: HCM

Concerns: blowdown, frequent bank erosion

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 2 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCD, HCO

Concerns: blowdown, steep side slopes with shallow soils and exposed bedrock, frequent bank erosion.

Buffer (RMA): Class III for HCM and HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 2.2L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: active bank erosion

Buffer (RMA): Class III for HCD to the to pof the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none	Buffer (RAW): no review needed

Protection: Category C 

Temporary road (reopened decommissioned) for Unit 456: Alternative 3 -- No known stream crossings. The temporary roads 

have not been field verified and will be surveyed before implementation. If any stream crossings are found, crossings 

structures and locations will be approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction 

(BMP 14.17). During construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 77 acres in Low SIO and 7 acres in Moderate. VAC is Intermediate to Low. Typical opening sizes according to the 

Forest Plan vary between 5 to 10 acres for Moderate SIO in Low VAC to 40 to 60 acres for Low SIO in Intermediate VAC. As 

long as uneven-aged management is used, there is no concern.

 RECREATION:

No Concerns

 SOILS/WETLANDS:
Unit 456 SOILS/WETLANDS:

Slopes range from about 30 to greater than 72%. About 3.5 acres were excluded due to steep and wet slopes and a historic 

landslide (pre-1971). In the remainder of the unit, there are less than 6 acres of slopes greater than 72% that are suitable for 

harvest with partial suspension. Two small debris avalanches were identified above the steep slopes in the central-southern 

area of the unit. Combined, these two avalanches are less than 1 acre. There are approximately 11 acres of forested wetland 

adjacent to the northeastern edge of the unit (BMP 12.5). A minimum of partial suspension would meet soil and wetland 

resource concerns (BMPs 12.5, 13.5, and 13.9).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3, in a corridor connecting the Honker 

large OGR complex with beach fringe near Sal Creek. Legacy standard and guideline applies in this VCU. No Legacy acres 

required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 

20 acres).
3000000

3000271

1.2L.1R

1.2L

456-1

456-1

1.2L.1L

1.2L.1L.1L

2.2L

1.2L.2R.1L

1.2L.1L

10

3.2R

1.2L.3L

3.2a L

2.1R

1

2

3.1 L.1L

1.3L

1.1L

457-1

1

2

3

3.1 L

2 .1 L

1.1L

1

3

1.2L.2R

1993

1993

455

456

457

454

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 456 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 457

Total Unit

Acres:

79.5 Prescription: 25% Removal

VCU

Number:

584 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

586

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 457 is mainly a western hemlock and western redcedar stand that transitions to mountain hemlock 

in the upper elevations and more pure western hemlock in the northern lower elevations. Generally old-growth stand 

structure dominates, however areas with heavy past wind damage in the upper and middle elevations have a two-age 

structure due to repeated wind damage. Extensive windthrow, moderate to high defect, and a moderate to low incidence of 

mistletoe was observed in the unit. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA 

requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. . Review the marking 

guides and silvicultural prescription for more detailed information and direction for how to implement this prescription.

A Tongass Wide Young Growth Study site (POW SAL Experiment #4) is along the southern boundary. Protection of this site 

is required. Contact the Forestry Sciences Lab in Juneau for additional information

No Legacy acres required for uneven-aged management because adequate structure retained in unit under uneven-aged 

harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the proposed temporary road.

 ENGINEERING/ROADS:

Unit utilizes a proposed temporary road for a landing location, totaling 1,700 feet, as displayed on the unit card. This road will 

be constructed entirely across decommissioned road bed.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Sal Creek. 

Stream#: 457-1 Class: III, IV Flagging: O/W, G/W C- Type: HCM, FPO

Concerns: very steep side slopes with shallow soil exposed bedrock

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for FPO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 457-2 Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: very steep side slopes with shallow soil exposed bedrock 

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Unit

Number 457 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 457

Protection: Category B and C

Stream#: 457-3 Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 457-3.1L Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: 457-3.1L.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM, HCO

Concerns: none

Buffer (RMA): Class III for HCD and HCO to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: 2 .2L Class: III, IV Flagging: O/W, G/W C- Type: HCD, HCO

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary road (reopened decommissioned) for Unit 457: Alternative 3 -- One Class IV stream crossings. The temporary 

roads have not been field verified and will be surveyed before implementation. Crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5. Upon completion of unit 

harvest, decommission road, restore natural drainage patterns by removing road fill from channels and installing water bar as 

necessary (BMP 13.16). Seed and fertilize disturbed soil adjacent to streams (BMP 12.17).

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No concerns due to uneven-aged management.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slope range from about 30 to greater than 72%. About 32 acres were excluded due to steep slopes, wet slopes, and 

unsuitable soils. In the remainder of the unit, there are no mapped slopes greater than 72%. About 6 acres of the unit 

require full suspension yarding in the southernmost part of the unit. In the remaining unit, a minimum of partial suspension 

would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

There are approximately 43 acres (54% of the unit) of forested wetland, primarily located in the western polygon (BMP 12.5).

 WILDLIFE:
Unit 457

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (all except sliver along southern edge). Unit is located within the 2008 Forest Plan OGR, which was modified under 

Alternative 3, in a corridor connecting the Honker large OGR complex with beach fringe near Salt Chuck. Unit is adjacent to 

small OGR on its west, north, and south borders. Legacy standard and guideline applies in this VCU. No Legacy acres 

required because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 

20 acres).
3020000

3020000

3000000

6

3

2

457-3. 1L.1R

457-3.1L

3.2R 3.2R

1.2L.1L.1L

2.2L

4.1R

3

3.2a L

2.1R

5

3.1 L.1L

2

457-2

457-3

2.1L

5

4

3.1L

457-1 1

5.1L

3

3 .1L.1R

3.1L.1R 1966

1992

1993

457

544

545

456

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 457 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

584

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 460

Total Unit

Acres:

8.0 Prescription: Clearcut

VCU

Number:

583 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

257

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 460 is a two-age western hemlock, Sitka spruce and Alaska-cedar stand. Repeated heavy past 

wind damage has occurred across the unit. Heavy past windthrow, moderate to high defect, and a moderate to low incidence 

of mistletoe defines the health of the stand. Timber volume varies across the unit. Heavy volume occurs in areas of even-age 

structure. The over-story of the stand is mainly western hemlock and Sitka spruce in even-aged patches with western 

hemlock and Alaska-cedar making the older cohort. All adjacent past harvest areas have regeneration at least 5 feet tall, 

meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate to high levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill cable yarding to landings on the existing NFS road 3025500.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams tributaries to Ratz Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: II, III Flagging: B/W, O/W C- Type: MCS, HCM

Concerns: none

Buffer (RMA): Class II for MCS greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B

Stream#: A1.1L Class: III Flagging: O/W C- Type: HCL

Concerns: none

Buffer (RMA): Class III for HCL to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A2 Class: III Flagging: O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Unit

Number 460 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 460

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 20% to about 50%. About 2 acres were excluded due to wet soils and saturated hollows. In the 

remainder of the unit, a minimum of partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, 

and 13.9). The entire unit is forested wetland (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit). Unit is located within the 2008 Forest Plan OGR, which was 

modified under Alternative 3, and now it is adjacent to the modified OGR at one point. Legacy standard and guideline applies 

in this VCU, however there are no requirements for this unit because it is less than 20 acres.
3025520

3025000

3025500

3025550

1.2 L 1.3L

1.1L

1.2R

1

A1

A2

1.1R

A1.1R

A1

A1.1L

1994

1994

1964

2006

1994

185

186

460

461

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 460 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 461

Total Unit

Acres:

3 - 78.0

4 - 25.4

Prescription: 25% Removal

VCU

Number:

582,

 583

Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

3 - 492

4 - 160 LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is a moderately well stocked stand of moderate defect, mature to over-mature western 

hemlock, western redcedar and Sitka spruce with areas of Alaska-cedar. Generally old-growth stand structure dominates, 

however areas with heavy past wind damage in upper elevations have two-age structure. Extensive windthrow, moderate 

defect, and a moderate incidence of mistletoe were observed in the unit. There are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 75 percent of the setting pretreatment basal area, based on standing live tree total for the unit, uncut. 

Individual trees selected for harvest may occur in small groups but will generally be evenly distributed across the stand. Any 

small groups will usually be less than one acre but may occasionally go up to two acres in size where needed to address 

insect and disease issues or capitalize on existing advanced regeneration of desirable tree species. Trees selected for 

harvest will generally be well distributed and no large openings will occur as a result of the harvest. Avoid harvesting around 

the sensitive plant population (<0.1 ac) in southern part of unit (see Botany). Review the marking guides and silvicultural 

prescription for more detailed information and direction on how to implement this prescription.

VCU 583 requires legacy and VCU 582 does not. However, no legacy acres required for uneven-aged management 

because adequate structure retained in unit under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3025500.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

One lesser round-leaved orchid (sensitive plant) population (1 individual) entirely inside unit; however, unit is 25% harvest 

prescription and population is less than 0.1 ac so it can be avoided. Designate leave trees in and around plant population. 

Population may be indirectly impacted.

 FISHERIES:

Streams drain to Clarence Strait (Stream characteristics do not include project-specific, field-verified, information).

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category B 

Unit

Number 461 Alternatives 3, 4

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 461

Stream#: A2 Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A3 Class: III Flagging: O/W C- Type: HCM

Concerns: none

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 and 4 Buffer (RAW): no review needed

Protection: Category B

Stream#: A4 Class: II Flagging: B/W C- Type: HCL

Concerns: none

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A5 Class: II Flagging: B/W C- Type: HCL

Concerns: none

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A5.1R Class: III Flagging: O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Most polygons are adjacent to the Ratz roadless area on their west or northern borders.

 SOILS/WETLANDS:

Slopes range from about 30 to greater than 72%. About 20 acres were excluded due to steep slopes, slides, and soil creep. 

In the remainder of the unit, there are no mapped slopes greater than 72%. A minimum of partial suspension would meet soil 

and wetland resource concerns (BMPs 12.5, 13.5, and 13.9).

Alternative 3

There are approximately 43 acres (55% of the unit) of forested wetland, primarily located in the southern four polygons and 

the northwest corner of the northern polygon (BMP 12.5).

Alternative 4:

There are approximately 4 acres (15% of the unit) of forested wetland in the northwest corner of the unit (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (very southern and very northern portions for Alternative 3; western 3/4 for Alternative 4). Unit is within 2008 Forest 

Plan OGR, which was modified under Alternatives 3 and 4. Unit is now adjacent to the modified OGR in both alternatives. 

Legacy standard and guideline applies in VCU 5830. No Legacy acres required because adequate structure retained in unit 

under uneven-aged harvest prescription (i.e., no openings larger than 20 acres).
3025500

3025520

A5

1

1.1L

A5.1R

A3

A1

A2

A4

A1.1R

1994

1965

186

460

461

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 461 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

582,583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
3025500

3025520

A5

1

1.1L

A5.1R

A3

A1

A2

A4

A1.1R

1994

1965

186

461

461

461

461

461

461

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 461 Alternative 4 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

Original Unit 

Reconnaissance 

Area

582,583

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt4.mxd 20 March 2012

RR

SR
Unit 463

Total Unit

Acres:

59.0 Prescription: 25% and 50% 

Removal

VCU

Number:

582 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

530

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is predominantly a western hemlock stand that transitions to western hemlock and western 

redcedar in the lower elevations. Areas of Sitka spruce occur in the middle to upper elevations of the northern polygon. 

Generally old-growth stand structure dominates, however areas with heavy past wind damage are present and trending the 

stand toward a more two-age structure. Heavy windthrow, average defect, and moderate to heavy mistletoe were noted. The 

southeastern setting has less exposure (due to more northerly aspect) and lower windthrow risk. There are no adjacent past 

harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Uneven-age Management Single Tree Selection

Maintain at least 50 percent of the southeastern setting and 75 percent of the remaining settings pretreatment basal area, 

based on standing live tree total for the unit, uncut. Individual trees selected for harvest may occur in small groups but will 

generally be evenly distributed across the stand. Any small groups will usually be less than one acre but may occasionally go 

up to two acres in size where needed to address insect and disease issues or capitalize on existing advanced regeneration 

of desirable tree species. Trees selected for harvest will generally be well distributed and no large openings will occur as a 

result of the harvest. Review the marking guides and silvicultural prescription for more detailed information and direction for 

how to implement this prescription.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3025500. Shorter yarding distances are 

possible by yarding to a barge if adequate anchorages are available.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams drain to Clarence Strait. Stream characteristics do not include project-specific, field-verified, information.

Stream#: 1 Class: II, IV Flagging: B/W. G/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. Class IV for HCO none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and C

Stream#: A1 Class: II, III Flagging: B/W, O/W C- Type: HCV, HCM

Concerns: none

Buffer (RMA): Class II for HCV greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A1.1R Class: III Flagging: B/W, O/W C- Type: HCM, HCD

Concerns: none

Buffer (RMA): Class III for HCM, HCD to the top of the side-slope break

Unit

Number 463 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 463

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Stream#: A1.2R Class: III Flagging: B/W, O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No concerns because of uneven-aged management.

 RECREATION:

Westernmost extent of unit touches the Ratz roadless area.

 SOILS/WETLANDS:

Slopes range from about 20 to greater than 72%. About 19 acres, originally reconned, were excluded due to very steep 

slopes, saturated hollows, and slides (some of this acreage is within the modified OGR). In the remainder of the unit, there 

are no mapped slopes greater than 72%. About 10 acres of the unit requires full suspension yarding; this area is located in 

the central-western part of the unit, immediately above the unsuitable soil area. In the remainder of the unit, a minimum of 

partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). Approximately 2/3 of unit is 

in forested wetland (mostly in northern 2/3).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Located in the 2008 Forest Plan OGR, which was modified under Alternative 3; the unit touches the modified OGR boundary 

at two locations. Legacy standard and guideline does not apply in this VCU.

One agle nest located to the north of where the creek drains to saltwater, and 3 to the south. Helicopter flight paths will be 

determined for the Final EIS; nest activity will be confirmed prior to project implementation. Timing restrictions will be 

implemented as appropriate.
3

2

1

A1.2R

A1

A1.1R

A1

213

463

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 463 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

582

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 464

Total Unit

Acres:

19.6 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Shovel, 

Helicopter

Net Harvest

Volume

(MBF):

757

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 464 is a western hemlock old-growth stand with Sitka spruce and Alaska-cedar present as lesser 

components. Moderate windthrow, average defect, and a moderate incidence of mistletoe were noted. All adjacent past 

harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

About 40% of this unit has a moderate SIO and is in foreground from Eagle Creek (the remainder is Very Low). Retention 

areas (visual buffers) have been designated along the northwest edge of settings to screen visibility from the creek. Design 

these screens approximately as shown on the unit card map. Evaluate the effectiveness and windthrow risk of the planned 

screens at the time of layout and adjust as needed.

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres; therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and helicopter yarding. Shovel settings are planned for yarding to the existing 

NFS road 3030100. Helicopter settings are planned for yarding to landings on the existing NFS road 3030100.

Unit is adjacent to new OGR along northeastern edge of northeastern polygon.

 ENGINEERING/ROADS:

This unit is accessed by reconstruction of existing NFS road 3030100, totaling 3900 feet. See corresponding road card for 

detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Eagle Creek. 

Stream#: 1 (Eagle Creek) Class: I Flagging: B/W C- Type: MCL, MML

Concerns: some bank erosion 

Buffer (RMA): Class I for MCL greater of 100 feet or to the top of the side-slope break. Class I for MML greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 1.3L Class: II Flagging: B/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break.

Unit

Number 464 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 464

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: 1.4L Class: II Flagging: B/W C- Type: HCM

Concerns: none

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

Stream#: 1.2L Class: II Flagging: B/W C- Type: MMO

Concerns: none known

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens..

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance. The 

physical boundaries of this unit are not to be modified without input from a Forest Service Heritage specialist.

 SCENERY:

Unit is in foreground from Eagle Creek and includes 8 acres of Moderate SIO, with the remainder in Very Low SIO. The unit 

consists of three separate openings. Visual screens (buffers) have been incorporated into unit design (see Silviculture) to 

screen visibility of all openings from Eagle Creek. Evaluation of windfirmness for these buffers is included.

 RECREATION:

Eagle Creek is a high value recreation stream. Implement buffers as indicated in Scenery. Timber harvest activities may be 

heard by recreationists using Eagle Creek.

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. There are approximately 3 acres of emergent sedge/forested wetland complex, and 5 

acres of forested wetland. Wetlands are primarily located in the northern and southern polygons (BMP 12.5).The soils and 

wetlands are suitable for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 

12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. 

Slopes over 25% gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when 

approving shovel yarding on slopes over 25% gradient. Avoid track slippage and rutting.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is located within the 2008 Forest Plan OGR, which is modified under Alternative 3. Legacy standard and guideline 

applies in this VCU, however there are no requirements for this unit because all settings are less than 20 acres. 

An eagle nest is located near this unit. Helicopter flight paths need to avoid this nest area during the nesting season; nest 

activity will be confirmed prior to project implementation.
3030112

3030100

1.1R.1R.1R

1.1R

1.1R

1.1R.1R

1

A1

1.5L

3

1

5

3

3.1R.1R.1L 3.1R

3.1R.1R

3.1R.2L

1.2L

1.3L.1R

2.1R

4

1

1

2

3

1.2L

1.3L

3.1R

1.4L

1996

1969

1969

1969

465

466

471

574

577

464

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 464 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 465

Total Unit

Acres:

21.2 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

495

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 465 is has old-growth stand structure with the over-story mainly western hemlock and western 

redcedar with Sitka spruce and Alaska-cedar present as lesser components. Moderate windthrow, average defect, and a 

moderate incidence of mistletoe were recorded. All adjacent past harvest areas have regeneration at least 5 feet tall, meeting 

NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

About half of this unit has a moderate SIO and is in foreground from Eagle Creek. Retention areas (visual buffers and 

retention for other reasons) have been designated along the southeast edge of settings to screen visibility from the creek. 

Design these screens approximately as shown on the unit card map. Evaluate the effectiveness and windthrow risk of the 

planned screens at the time of layout and adjust as needed.

The legacy standard and guide applies in this VCU. This requires that approximately 9 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to 

cover RMAs, provide visual screens, increase travel corridor width for wildlife, and address heritage concerns. Total 

mapped legacy is approximately 10 acres. Any adjustments to the planned unit during implementation must consider the 

planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3030100.

 ENGINEERING/ROADS:

This unit is accessed by reconstruction of existing NFS road 3030100, totaling 2500 feet. See corresponding road card for 

detailed information.

 BOTANY:

Two populations (184 and 92 individuals) of lesser round-leaved orchid (sensitive plant) are partially in the original unit. 

About 0.2 ac were excluded from the unit to avoid direct and most indirect effects on the large population. Slightly over half of 

the other population is in the unit. Unit also indirectly affects portions of these populations, located to the north and west of 

the unit.

 FISHERIES:

Unit

Number 465 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 465

Streams are tributaries to Eagle Creek. 

Stream#: 1 (Eagle Creek) Class: I Flagging: B/W C- Type: MCL, MML

Concerns: some bank erosion

Buffer (RMA): Class I for MCL greater of 100 feet or to the top of the side-slope break. Class I for MML greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: 1.1R Class: II Flagging: B/W C- Type: HCM, MMS, PAB

Concerns: blowdown observed

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class II - greater of 120 feet (MMS) 

or 100 feet (PAB), flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

Stream#: 2 Class: I, II Flagging: B/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 2.1R Class: II Flagging: B/W C- Type: HCO

Concerns: none

Buffer (RMA): Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 3 Class: I, II Flagging: B/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 4 Class: I, II Flagging: B/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: 5 Class: I, II Flagging: B/W C- Type: MMO, HCO

Concerns: none

Buffer (RMA): Class I for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCO greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance. The 

physical boundaries of this unit are not to be modified without input from a Forest Service Heritage specialist.

 SCENERY:
Unit 465

Unit is in foreground from Eagle Creek and includes 11 acres of Moderate SIO, with the remainder in Very Low SIO. The unit 

consists of four openings separated by TTRA buffers and legacy. Expanded RMAs also parallel Eagle Creek and a visual 

screen (buffers) was incorporated into unit design (see Silviculture) to add width in one case. With these buffers and 

screens, it is intended that the unit be visually screened from Eagle Creek. Evaluation of windfirmness for these buffers is 

included.

 RECREATION:

Timber harvest activities may be heard by recreationists using Eagle Creek.

 SOILS/WETLANDS:

Slopes are gentle throughout the unit. A minimum of partial suspension would meet soil and wetland resource concerns 

(BMPs 12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range; 

unit also includes large-tree POG (SD 67). Unit is located within the 2008 Forest Plan OGR, which was modified under 

Alternative 3. Legacy standard and guideline applies in this VCU; positioning of legacy acres covers some deer winter 

range/marten habitat and large-tree POG.

An eagle nest is located in the stream buffer for Eagle Creek. Helicopter flight paths will be determined for the Final EIS; 

nest activity will be confirmed prior to project implementation.
3030100

3030110

3030200

3030108

3030000

3030100

R.7L.3L

A1.1R

1

1

1

1

1.5L

1.1R.4 R

4

1.1R.1R

5

4.1L

1.2L

1.1R 1. R 1.

1.3L.1R

2.1R

1.1R.7L.1L

1.1R.8R .1L

1.1R

5.1L

1.1R.7L.2R

1.1R.2L

1.1R.5R.1L

4

1.1R.5R

1

1.1R. 7 L

2

3

1.1R.7L.1L

1.2L

1.3L

1.1 R

1.1R.3R

1.1R 8. R

1.1R

1.4L

1.1R

1.1R

1995

1969

1969

1996

1969

1969

465

466

469

470

572

574

464

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 465 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 466

Total Unit

Acres:

27.4 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

608

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 466 is described as a wind driven predominantly western hemlock and Sitka spruce stand. Oldgrowth stand structure dominates between significant areas of even-age structure some of which are in stem exclusion. 

Heavy past windthrow and stem breakage, high defect, and a moderate to high incidence of mistletoe define the area. Overstory trees are evenly spaced and lightly stocked due to past windthrow. Fluting was noted as particularly heavy in the 

overstory and midstory hemlock. Very poor residual tree stocking was noted for the central eastern portion of the unit. There 

are no adjacent past harvest areas. 

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time becaause it is not expected to obtain the desired condition given 

the current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

About 17 acres of this unit has a moderate SIO and is in foreground from Eagle Creek. Retention areas (made up of legacy 

due to expanded RMAs or for visual screens) have been designated along the southeast and eastern edge of setting to 

screen visibility from the creek and saltwater areas. Design these legacy areas as shown on the unit card map. Evaluate the 

effectiveness and windthrow risk of the planned screens at the time of layout and adjust as needed.

The legacy standard and guide applies in this VCU. This requires that approximately 12 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy placed along Eagle 

Creek to screen visibility, increase travel corridor width for wildlife, and build off of RMA at northeast end of unit and RMA at 

west end of unit to provide RAW. Total mapped legacy is approximately 12 acres. Any adjustments to the planned unit 

during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to the existing NFS road 3030100.

 ENGINEERING/ROADS:

This unit utilizes reconstruction of existing NFS road 3030100, totaling 3,900 feet, for helicopter landings. See corresponding 

road card for detailed information.

 BOTANY:

No Concerns

 FISHERIES:

Unit

Number 466 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 466

Streams are tributaries to Eagle Creek.

Stream#: 1 (Eagle CreeK) Class: I Flagging: B/W C- Type: MCL, MML

Concerns: none

Buffer (RMA): Class I for MCL greater of 100 feet or to the top of the side-slope break. Class I for MML greater of 120 feet, 

flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A 

Stream#: A1 Class: III Flagging: O/W C- Type: HCM

Concerns: none 

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Stream#: 1.1R Class: II Flagging: B/W C- Type: HCM, MMS, PAB

Concerns: blowdown observed

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class II - greater of 120 feet (MMS) 

or 100 feet (PAB), flood plain, riparian vegetation or soils, or riparian associated wetland fens. 

Alternatives: 3 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A 

Stream#: 1.1R.1R Class: II Flagging: B/W C- Type: MMS

Concerns: none

Buffer (RMA): Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 Buffer (RAW): Will be identified by IDT during layout.

Protection: Category A

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit is in foreground from Eagle Creek and includes 17 acres of Moderate SIO, with the remainder in Very Low SIO. 

Retention areas (made up of legacy due to expanded RMAs or for visual screens) have been designated along the southeast 

and eastern edge of setting to screen visibility from the creek and saltwater areas. Design these legacy areas as shown on 

the unit card map. Evaluate the effectiveness and windthrow risk of the planned screens at the time of layout and adjust as 

needed.

 RECREATION:

Timber harvest activities may be heard by recreationists using Eagle Creek.

 SOILS/WETLANDS:

Slopes are gentle through the unit. A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 

12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range; 

unit also includes large-tree POG (SD 67). Unit is located within the 2008 Forest Plan OGR, which was modified under 

Alternative 3. Northern boundary of eastern half of unit is almost adjacent to the modified OGR. Legacy standard and 

guideline applies in this VCU; positioning of Legacy acres covers some deer winter range/marten habitat and large-tree POG.
3030270

3030100

4.1L

1.1R

1.1R

1.1R.1R.1R.1L

1.1R.1R.1R

1.1R.1R

2.1R

1

A1

1

3

4

3.1 R

1R.1R 3. L

3.1R.1R.1L 3.1R

3.1R.1R

3.1R.2L

1.1R.1R

1.2L

1.3L.1R

1.3L

1.1R.2L

1.1R.1R.4R

1.1R.1R.1R

1.1R.1R.2L

2

4

1.1R.1R.3L

3

1.2L

1.4L 1.1R.3R

1992

1995

1969

1969

1969

1989

465

466

471

577

464

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 466 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 469

Total Unit

Acres:

27.2 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable

Net Harvest

Volume

(MBF):

823

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 469 is a mixed species stand with western hemlock, western redcedar, Sitka spruce and Alaskacedar. Generally, old-growth stand structure dominates however patchy areas of heavy past wind damage across the stand 

have a two-age stem exclusion structure. Heavy repeated wind damage, average to high defect, and a generally moderate 

incidence of mistletoe was noted. Breakage and stem decay are the primary issues in the overstory. All adjacent past 

harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time becaause it is not expected to obtain the desired condition given 

the current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, improve site productivity through increased soil 

temperature and minimize defect and disease in the future stand to the maximum extent possible. 

This unit is adjacent to the Coffman Cove Loop road and due to the combination of Modified Landscape LUD and foreground 

distance zone, requires minimal visibility of harvest openings from this road. In order to meet this requirement a screen of 

trees is being prescribed to be maintained to block the harvest area from view. Design this screen approximately as shown 

on the unit card map. Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as 

needed. This screen will also serve as legacy retention. 

The legacy standard and guide applies in this VCU. This requires that approximately 14 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Most legacy is provided by 

areas dropped for soils and RMA; however, visual buffers were added along the 3030 road and some additional legacy was 

added along RMA at NE end of unit. Total mapped legacy is approximately 20 acres. Any adjustments to the planned unit 

during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for uphill and downhill cable yarding to landings on the existing NFS road 3030200.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

Portions of two large lesser round-leaved orchid (sensitive plant) populations (estimated at 565 and 207 plants) occur in unit 

or legacy of unit . The smaller population is completely avoided by unit design, while about 23 acres of the larger population 

occurs in the unit and 22 acres occurs in the legacy, TTRA, or deferred areas of the unit. The majority of this larger 

population is outside of all units and not impacted. This population is also impacted by Units 470 and 471, which collectively 

result in direct impacts to 17% of the population. These populations are partially indirectly impacted by the unit; populations 

nearly surround area proposed for harvest.

 FISHERIES:

Unit

Number 469 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 469

Streams are tributaries to Eagle Creek. 

Stream#: 1.1R Class: II, III Flagging: B/W, O/W C- Type: HCL, HCM

Concerns: debris in channel holding back bedload

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCM to the top of the 

side-slope break.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B 

Stream#: 1.1R.7L Class: II, III Flagging: B/W, O/W C- Type: MMO, HCL

Concerns: existing LWD in channel is holding back bedload and sediment

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class III for HCL to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed 

Protection: Category A and B 

Stream#: 4 Class: II, III Flagging: B/W, O/W C- Type: HCM, HCD

Concerns: none

Buffer (RMA): Class II for HCM greater of 100 feet or to the top of the side-slope break. Class III for HCM and HCD to the 

top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B 

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 23 acres in Moderate SIO and 4 acres in Low SIO. It is adjacent to the Coffman Cove Loop road and requires 

minimal visibility of harvest openings from this road. In order to meet this requirement a screen of trees is being prescribed to 

be maintained to block the harvest area from view. Design this screen approximately as shown on the unit card map. 

Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as needed.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 50 to greater than 72%. About 11 acres were excluded due to steep slopes. All slopes over 72% 

are in the soil exclusion area. In the remainder of the unit, a minimum of partial suspension would meet soil and wetland 

resource concerns (BMPs 12.5, 13.5, and 13.9). There is approximately 1 acre of forested wetland in the southwest portion 

of the unit (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), all of which is also deep snow marten habitat/deer winter range. 

Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3. Unit is adjacent to modified OGR. 

Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer winter range/marten 

habitat.
3030108

3030000

3030200

3030100

3030390

1.1R 9. R

1.1R.8R

1.1 R

1.1R 8. R

1.1R.7L

1.1R.3 R

4

1.1R

2

1.1R.1R.2L

3

5

1.1R.8R.2R

4.1L

1.1R.7L.1L

A1.1R.1R.24

1.1R.7L.3L

1.1R.1R.2L .1L

1.1R.8R .1L

4

1.1R

6

A1.1R.9R

5.1L

5

1.1R.7L.2R

1.1R.5R.1L

1.1R.4 R

1.1R.5R

1.1R.1R.3 L

1.1R.1R.2L

1. 1R.7L.1L

1.1R

1974

1989

1989

1969

1995

465

469

470

572

191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 469 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

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Unit 470

Total Unit

Acres:

67.6 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

1,728

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is predominantly a western hemlock and western redcedar stand. Western hemlock and 

Alaska-cedar occur in the upper elevations. Generally old-growth stand structure dominates, however windthrow and stem 

breakage are extensive. Areas of advanced even-age structure occur in the southeast polygon below the road and in the 

northeastern-most polygon as well as thru the center of the unit where slopes bench out just above the central band of 

steeper slopes. Extensive repeated windthrow, moderate to high defect, and patches of heavy mistletoe were noted. All 

adjacent past harvest areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being 

considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time becaause it is not expected to obtain the desired condition given 

the current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

This unit is adjacent to the Coffman Cove Loop road and due to the combination of Modified Landscape LUD and foreground 

distance zone, requires minimal visibility of harvest openings from this road. In order to meet this requirement a screen of 

trees is being prescribed to be maintained to block the harvest area from view. Design this screen approximately as shown 

on the unit card map. Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as 

needed. This screen will also serve as legacy retention. 

The legacy standard and guide applies in this VCU. This requires that approximately 34 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG and tie into areas dropped for RMA/TTRA buffers and to include sensitive plant populations. Legacy was also 

placed as a visual buffer along 3030000 road. Legacy effectively divides unit into three openings. Total mapped legacy is 

approximately 44 acres. Any adjustments to the planned unit during implementation must consider the planned acreage and 

location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Cable settings are planned for uphill yarding to landings 

on proposed NFS road 3030390. Shovel settings are planned for yarding to the proposed temporary road, proposed NFS 

road 3030390, and existing NFS road 3030000.

 ENGINEERING/ROADS:

Unit is accessed by a proposed temporary road, totaling 400 feet, as displayed on the unit card. Unit is also accessed by 

proposed NFS road 3030390, totaling 3,600 feet. Approximately 800 feet of this road will be constructed across 

decommissioned road bed. See corresponding road card for detailed information.

 BOTANY:

One large population of lesser round-leaved orchid (sensitive plant) partially in unit (33 acres of population area to be 

harvested, 51 ac in legacy, TTRA, deferred). This population is also impacted by Units 469 and 471, which collectively result 

in direct impacts to 17% of the population. Unit indirectly impacts portions of this large population located adjacent to the 

eastern half of the unit and the portions in legacy.

 FISHERIES:

Unit

Number 470 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 470

Streams are tributaries to Eagle Creek. 

 

Stream#: 1.1R.1R.2L Class: II, IV Flagging: B/W, G/W C- Type: MMO, HCM

Concerns: none

Buffer (RMA): Class II for MMO greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class IV for HCM none.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and C 

Stream#: 1.1R Class: II, III Flagging: B/W, O/W C- Type: MMS, HCL, HCM

Concerns: blowdown observed, debris blockages holding bedload material

Buffer (RMA): Class II for MMS greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. Class II for HCL and HCM greater of 100 feet or to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A and B

Stream#: 1.1R.8R Class: II, III, IV Flagging: B/W, O/W, G/W C- Type: HCL, HCM, MMO

Concerns: blowdown observed, LWD in channel holding back sediment

Buffer (RMA): Class II for HCL greater of 100 feet or to the top of the side-slope break. Class III for HCL and HCM to the top 

of the side-slope break. Class IV for MMO none.

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A, B and C 

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 470: Alternative 3 -- no known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 27 acres in Moderate SIO, 32 acres in Low SIO, and 9 acres in Very Low SIO. It is adjacent to the Coffman Cove 

Loop road and requires minimal visibility of harvest openings from this road. In order to meet this requirement a screen of 

trees is being prescribed (as legacy) to be maintained to restrict the harvest area from view. Design this screen 

approximately as shown on the unit card map. Evaluate the effectiveness and windthrow risk of the planned screen at the 

time of layout and adjust as needed.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range from about 15% to greater than 72%. About 15 acres were excluded due to steep slopes, wet slopes, and 

colluvial activity. All slopes over 72% are in the soil exclusion area. In the remaining unit, the soils and wetlands are suitable 

for a minimum partial suspension yarding or shovel yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. 

Specifically, the shovel operator should avoid the small non-forested areas of the unit to prevent rutting. Slopes over 25% 

gradient may not be suitable for shovel yarding under some soil moisture conditions. Use care when approving shovel 

yarding on slopes over 25% gradient. Avoid track slippage and rutting. Approximately 1/3 of unit is in forested wetland (in the 

northwestern part of the unit).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern and southern ends). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 

3. Unit is adjacent to the modified OGR. Legacy standard and guideline applies in this VCU; positioning of Legacy acres 

covers some deer winter range/marten habitat.
3030108

3030270

3030000

3030200

3030300

3030100

3030390

1. 1R 8. R

1.1R.1R.2L

1.1 R.1 R.3L

1.1R

1.1R.1R.1R.1L

1.1R

1.1R.1R.1R

A1.1R.1R.24

1.1 R.1R

4

1.1R.1R

1.1R.3 R

1.1R.7L

1.1

2

2

5.1L

1.1R 1. R

1.1R 9. R

1.1L.2L

3

1.1R.1R.2L

2.1R

1.1R.8R.2R

4.1L

1.1R.7L.1L

1.1R.7L.3L

1.1L

1.1R.1R.2 L.1L

1.1R.8R.1L

1

1.1R

A1.1R.9R

1.1R.7L.2R

1.1R.2L

1.1R.1R.4R

1.1R.1R.1R

1.1R.5R.1L

1.1R. 4R

1.1R.5R

3

4

2

1.1 R.7L.1L

1.1R

1.1R.8R

1. 1R 1.1R.3R

1992

2004

1974 1992

1974

1989

2005 1969

1974

1989

1992

1995

464

465

466

469

470

471

572 191

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 470 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 471

Total Unit

Acres:

32.8 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Cable, Shovel

Net Harvest

Volume

(MBF):

640

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: This unit is an old-growth stand with windthrow and stem breakage resulting in some areas of even-aged 

stand structure. Variable windthrow and stem breakage, moderate stem decay, and moderate mistletoe were noted. The overstory of the stand is western hemlock, redcedar and spruce. All adjacent past harvest areas have regeneration at least 5 feet 

tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time becaause it is not expected to obtain the desired condition given 

the current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

This unit is adjacent to the Coffman Cove Loop road and due to the combination of Modified Landscape LUD and foreground 

distance zone, requires minimal visibility of harvest openings from this road. In order to meet this requirement screens of 

trees are being prescribed to be maintained to limit the harvest area from view. Design this screen approximately as shown 

on the unit card map. Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as 

needed. This screen will also serve as legacy retention. 

The legacy standard and guide applies in this VCU. This requires that approximately 14 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to block 

up POG, screen the unit from the 3030 road, shorten required road length, and avoid interference with logging. Total 

mapped legacy is approximately 15 acres. Any adjustments to the planned unit during implementation must consider the 

planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for a combination of shovel and cable yarding. Shovel settings are planned for yarding to existing NFS 

road 3030000. Cable settings are planned for uphill and downhill yarding to landings on the proposed temporary roads.

 ENGINEERING/ROADS:

Unit is accessed by two proposed temporary roads, totaling 1,900 feet, as displayed on the unit card.

 BOTANY:

One large population (565 individuals) is partially in unit (3 acres of population to be harvested, 15 ac in legacy, TTRA, 

deferred). This population is also impacted by Unit 469 and 470, which collectively result in direct impacts to 17% of the 

population. The majority of the large population in this area is outside of units and not impacted. Unit indirectly affects the 

portion of the population located outside of the unit.

 FISHERIES:

Unit

Number 471 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 471

Streams are tributaries to Eagle Creek. 

All streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C 

Temporary roads for Unit 471: Alternative 3 -- no known stream crossings. The temporary roads have not been field verified 

and will be surveyed before implementation. If any stream crossings are found, crossings structures and locations will be 

approved by USFS, in consultation with fisheries biologist or hydrologist, prior to construction (BMP 14.17). During 

construction of temporary roads implement BMPs 12.17, 13.10, 13.11, 13.16, 14.3, and 14.5.

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

Unit has 11 acres in Moderate SIO and 22 acres in Low SIO. It is adjacent to the Coffman Cove Loop road and requires 

minimal visibility of harvest openings from this road. In order to meet this requirement a screen of trees is being prescribed 

(as legacy) to be maintained to restrict the harvest area from view. Design this screen approximately as shown on the unit 

card map. Evaluate the effectiveness and windthrow risk of the planned screen at the time of layout and adjust as needed.

 RECREATION:

No Concerns

 SOILS/WETLANDS:

Slopes range about 20 to 50%. The soils and wetlands are suitable for a minimum partial suspension yarding or shovel 

yarding. All logging systems should follow BMPs 12.5, 13.2 and 13.9. Specifically, the shovel operator should avoid the small 

non-forested areas of the unit to prevent rutting. Slopes over 25% gradient may not be suitable for shovel yarding under 

some soil moisture conditions. Use care when approving shovel yarding on slopes over 25% gradient. Avoid track slippage 

and rutting. 

There are approximately 2 acres of emergent sedge/forested wetland in the northeastern portion of the unit (BMP 12.5).

Based on GIS analysis, the proposed temporary road does not traverse any wetlands.

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern half). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3. Unit is 

adjacent to modified OGR. Legacy standard and guideline applies in this VCU; positioning of Legacy acres covers some deer 

winter range/marten habitat.
3030000

3030270

3030300

3030390

1.1R.3R

1.1 L.1L

1.1R.1R.2L

1.1R.1R.3L

1.1R.1R.1R.1L

A1.1R.1R.24

1.1R.1R 1 1. R 1. R

1.1R.9R

1.1L.2L

1.1R.3R

1.1R.1R.2L

1.1L.1L

2 2

1.1R.8R.2R

1.1L

1.1R.1R.2L .1L

A1.1R.9R

1.1R.1R.4R

1.1R.1R.1R

1.1R.1R.1R

1.1R.8R

1970

1992

1974

1970

1992

1989

1992

1989

1974

470

471

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 471 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 473

Total Unit

Acres:

5.8 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

186

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 473 is a high elevation, low productivity, high defect over-mature stand. Old-growth stand structure 

dominates. The over-story of the stand is a mix of western hemlock, Sitka spruce and red and yellow-cedar. Sitka spruce are 

widely spaced, large, high defect trees. Windthrow risk is moderate and mistletoe was rated light. All adjacent past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with high levels of decay and defect resulting in a situation where stand growth 

is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow post 

harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to the 

maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit consists of settings that are less than 20 acres, 

therefore no legacy set-aside is required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3000330.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit

Number 473 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 473

Unit touches the Thorne River roadless are to the southeast.

 SOILS/WETLANDS:

Slopes range from about 30 to greater than 72%. About 3 acres were excluded due to steep slopes over 80%. All slopes over 

72% are in the soil exclusion area. A minimum of partial suspension would meet soil and wetland resource concerns (BMPs 

12.5, 13.5, and 13.9). The entire unit is forested wetland (BMP 12.5).

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range (northern half of unit). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3. Unit is 

adjacent to the modified OGR. Legacy standard and guideline applies in this VCU, however there are no requirements for 

this unit because it is less than 20 acres.
3000330

3000332

3000305

3000330

A1

1969

1989

1973 1992

1973

1973

473

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 473 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 475

Total Unit

Acres:

14.9 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

359

LUD:

Timber Production

 SILVICULTURE:

Existing Conditions: Unit 475 is an upper elevation, gap phase old growth stand of mixed species. The over-story of the stand 

is a mix of western hemlock, red and yellow-cedar and Sitka spruce. Sitka spruce are widely spaced large trees. Windthrow 

risk is moderate. Mistletoe and defect were rated moderate as well. All adjacent past harvest areas have regeneration at 

least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time because it is not expected to obtain the desired condition given the 

current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where stand 

growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of windthrow 

post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the future stand to 

the maximum extent possible. 

The legacy standard and guide applies in this VCU; however, the unit is less than 20 acres, therefore no legacy set-aside is 

required.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3000333.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Stream#: A2 Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): Will be identified by an IDT during layout

Protection: Category B

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

Unit

Number 475 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 475

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit is adjacent to the Thorne River roadless area on the east.

 SOILS/WETLANDS:

Slopes range from about 50 to greater than 72%. About 61 acres were excluded due to steep slopes, wet soils, and 

landslides. In the remainder of the unit, there are no mapped slopes greater than 72%. In the remaining unit, a minimum of 

partial suspension would meet soil and wetland resource concerns (BMPs 12.5, 13.5, and 13.9). No wetlands have been 

mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deep snow marten habitat/deer winter 

range 9 (western 1/2 of unit). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3. Unit 

is adjacent to the modified OGR. Legacy standard and guideline applies in this VCU, however there are no requirements for 

this unit because it is less than 20 acres.
3000336

3000331

A1.1L.1L

1

A2

A1

1988

1973

1973

1973

1973

1973

475

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 475 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR
Unit 476

Total Unit

Acres:

59.9 Prescription: Clearcut

VCU

Number:

581 Harvest

System:

Helicopter

Net Harvest

Volume

(MBF):

1,509

LUD:

Modified Landscape

 SILVICULTURE:

Existing Conditions: Unit 476 is a mid to upper elevation, gap phase-old growth stand of primarily western hemlock. The overstory of the stand is a mix of western hemlock and scattered Sitka spruce with western redcedar occurring in the north on the 

gentler slopes. Windthrow risk is moderate. Mistletoe and defect were rated moderate as well. All adjacent past harvest 

areas have regeneration at least 5 feet tall, meeting NFMA requirements for no longer being considered openings.

Silvicultural Objective/Desired Condition: The desired condition for this stand is a highly productive, healthy, windfirm stand 

grown for timber management that retains residual trees as needed to meet standards and guides or other objectives. 

Silvicultural Prescription: Even-age Management - Clearcut

This stand is being recommended for harvest at this time becaause it is not expected to obtain the desired condition given 

the current growth trajectory. This stand is mature with moderate levels of decay and defect resulting in a situation where 

stand growth is being offset by decay. Even-aged clear cutting is being prescribed to preclude or minimize the risk of 

windthrow post harvest, promote natural regeneration by opening up the canopy, and minimize defect and disease in the 

future stand to the maximum extent possible. 

The legacy standard and guide applies in this VCU. This requires that approximately 29 acres of productive old growth 

representative of the overall composition of the planned harvest area be maintained indefinitely. Legacy was placed to 

coincide with areas dropped due to soil concerns and RMAs. Total mapped legacy is approximately 29 acres. Any 

adjustments to the planned unit during implementation must consider the planned acreage and location of legacy.

 TIMBER/LOGGING:

This unit is planned for helicopter yarding to landings on the existing NFS road 3000336.

 ENGINEERING/ROADS:

No proposed road construction.

 BOTANY:

No Concerns

 FISHERIES:

Streams are tributaries to Luck Creek. Stream characteristics do not include project-specific, field-verified, information.

Stream#: A1 Class: I Flagging: B/W C- Type: MMM

Concerns: none known

Buffer (RMA): Class I for MMM greater of 120 feet, flood plain, riparian vegetation or soils, or riparian associated wetland 

fens. 

Alternatives: 3 	Buffer (RAW): Will be identified by an IDT during layout 

Protection: Category A 

Stream#: A1.1L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.1L.1L Class: III Flagging: O/W C- Type: HCD

Concerns: none known

Buffer (RMA): Class III for HCD to the top of the side-slope break. 

Unit

Number 476 Alternatives 3

Summary of Concerns, Responses, BMPs and Mitigation

 INVASIVE SPECIES:

No Concerns
Unit 476

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.2L Class: I, III Flagging: B/W, O/W C- Type: AFM, HCM

Concerns: none known

Buffer (RMA): Class I for AFM greater than 140 feet or the active portion of the alluvial fan. Class III for HCM to the top of 

the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category A and B 

Stream#: A1.2L.1L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A3 Class: III, IV Flagging: O/W, G/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCM none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C

Stream#: A1.2L.2L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

 

Stream#: A1.2L.1R Class: III, IV Flagging: O/W, G/W C- Type: HCLw

Concerns: none known

Buffer (RMA): Class III for HCLw to the top of the side-slope break. Class IV for HCLw none.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B and C 

Stream#: A1.2L.3L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.2L.1R Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.2L.4L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B 

Stream#: A1.3L Class: III Flagging: O/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. 

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B

Stream#: A1.3L.1L Class: III, IV Flagging: O/W, G/W C- Type: HCM

Concerns: none known

Buffer (RMA): Class III for HCM to the top of the side-slope break. Class IV for HCM.

Alternatives: 3 Buffer (RAW): no review needed

Protection: Category B
Unit 476

All other streams in unit: Class: IV Flagging: G/W C- Type: HC or MM

Buffer (RMA): none Buffer (RAW): no review needed

Protection: Category C

 GEOLOGY/KARST:

No Concerns

 HERITAGE RESOURCES:

This unit was investigated per the third amended interagency Programmatic Agreement (PA) for historic properties. As 

specified by the PA, any potential adverse effect on historic properties (if any) was mitigated and portions of the Area of 

Potential Effect will be monitored by a qualified heritage specialist during and/or after actual ground disturbance.

 SCENERY:

No Concerns

 RECREATION:

Unit is adjacent to the Thorne River roadless area on the east.

 SOILS/WETLANDS:

Slopes range from about 30 to greater than 72%. In the remainder of the unit, there are about 2 acres of mapped slopes 

greater than 72% that are suitable for harvest with partial. About 29 acres were excluded due to steep slopes and landslides. 

suspension. In the remaining unit, a minimum of partial suspension would meet soil and wetland resource concerns (BMPs 

12.5, 13.5, and 13.9). No wetlands have been mapped in the unit

 WILDLIFE:

Unit includes average snow deer winter range (entire unit), some of which is also deer snow marten habitat/deer winter range 

(southern 2/3 of unit). Unit is located within the 2008 Forest Plan OGR, which was modified under Alternative 3. Unit is 

adjacent to the modified OGR on the east. Legacy standard and guideline applies in this VCU; positioning of Legacy acres 

covers some deer winter range/marten habitat.
3000336

3000331

A3

A1.2L.2R

A1.2L.1R

A1.3L.1L

A1.3L

A1.2L

A1.2L.1L

A1

A1.2L.3L

A1L.1L

A1.2L.2L

A1.1L.1L

A1.2L.4L

1988

1973

1973

1973

1969

1975

1989

1975

475

476

A

A

B

B

C

C

D

D

E

E

F

F

G

G

H

H

I

I

J

J

10 10

9 9

8 8

7 7

6 6

5 5

4 4

3 3

2 2

1 1

Unit Number 476 Alternative 3 VCU: 

0 500

Feet

Past Harvest

(Year Origin)

Unsuitable Soils

Riparian Management

Area

Slope > 72%

Other Ownership

Old Growth Habitat LUD

Recreation River LUD

Scenic River LUD

State Highway

National Forest System Road - Open

National Forest System Road - Stored

Non-National Forest 

System Road

Proposed Reconstructed Road

Proposed System Road 

(reopened Decommissioned)

Proposed Temporary Road 

(reopened Decommissioned)

Proposed System Road

Proposed Temporary

Road

Old Growth

Helicopter

Shovel or Cable

Partial Cut

Young Growth

Systematic Strip Thin

Uniform Crown Thin

Class 1 Stream

Class 2 Stream

Class 3 Stream

Class 4 Stream

Lake

100’ Contour

Eagle Nest Buffer

Legacy

Visual Buffer

Deferred (within

Original Unit

Reconnaissance

Area)

581

R:\projects_2010\BigThorneEIS\maps\Unitcards\Alt3.mxd 14 July 2012

RR

SR