Hwy 46 FEIS Appendix 

328

Appendix G – Riparian Reserve Treatment Detail

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

1 41 15.3 4.2 4 172 30 Thin to increase structural and vegetative diversity

3 53 2.4 2.0 4 172 30 Thin to increase structural and vegetative diversity

5 45 33.5 14.1

2 344 60

Thin to increase structural and vegetative diversity, 

opportunity for additional post-sale fall and leave along 

Humbug Cr. Has large trees, hardwoods and cedars in 

riparian (meeting ACSO's, but needs more LWD,

4 172 60 Thin to increase structural and vegetative diversity

6 48 27.1 21.1 3 172 60

Very dense monoculture of DF with a thin strip of alders. No 

understory. Accelerate achievement of ACSO's by thinning in 

riparian area and increasing stand diversity.

7 54 6.2 3.8

2 344 100 Thin to increase structural and vegetative diversity

4 172 30 Thin to increase structural and vegetative diversity

11 56 3.4 2.6

1 344 >125

Thin to increase structural and vegetative diversity, paved 

Hwy 46 between the unit and the Breitenbush River negate 

need for full RR buffer.

4 172 30 Thin to increase structural and vegetative diversity

12 123 3.1 0.2 4 172 172 On way to achieving ACSO’s; No treatment in RR.

13 131 17.7 9.9

1 344 >172

Protect ACSO’s between river and paved Hwy 46 between 

the unit and the Breitenbush River. Beyond the highway does 

not contribute to riparian health. 

2 344 172

On way to achieving ACSO’s closer to stream. Thin to 

increase structural and vegetative diversity in outer riparian. 

Opportunity for additional hardwood release.

4 172 30 Thin to increase structural and vegetative diversity

16 115 36.6 18.6

3 172 60-100 Thin to increase structural and vegetative diversity. South 

side of streams have larger buffer for shade protection.

4 172 30 Thin to increase structural and vegetative diversity

17 110 2.3 0.0 4 172 30 Thin to increase structural and vegetative diversity

18 120 27.5 6.0 3 172 100-172

Much of RR is on way to achieving ACSO's with high 

amount of downed wood, cedars, diversity and canopy layers. 

Some alder pockets. Other areas in need of treatment. Thin to 

reduce density and increase structural and vegetative 
Hwy 46 FEIS Appendix 

329

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

diversity. Variable buffer with hydrologist approval on 

layout.

4 172 30 Thin to increase structural and vegetative diversity

19 39 1.1 0.0 4 172 NA No streams in unit (Cls 4 outside of unit). Old plantation, 

needs thinning for diversity.

20 30 1.3 1.3 4 172 30 No streams in unit (Cls 4 outside of unit). Old plantation, 

needs thinning for diversity.

21 113 8.2 6.8 4 172 30

Very dense stand. Thin to increase species and structural 

diversity with riparian thinning. Considered for additional 

riparian treatment (streamside hardwood release gaps) but 

low priority.

22 115 37.2 20.7

Short 

Lake 344 150+

Very dense stand. Increase species and structural diversity 

with riparian thinning and protect lake from additional user 

impact. Minimum 150’ buffer with no harvest between lake 

and road.

3 172 80-100

Very dense stand. Thin to increase species and structural 

diversity with riparian thinning. Considered for additional 

riparian treatment (streamside hardwood release gaps) but 

low priority. Buffers protect primary shade and shallow 

groundwater.

4 172 30

Thin to increase species and structural diversity with riparian 

thinning. Buffers protect primary shade and shallow 

groundwater.

23 36 19.8 2.6 4 172 100

Thin to increase species and structural diversity in outer RR. 

Protect wet areas, shallow groundwater and diversity. 

Considered for additional fall and leave treatment but not 

selected. 

24 120 24.5 4.4

3 172 100-172 Much of RR is on way to achieving ACSO's with high 

amount of downed wood, cedars, diversity and canopy layers. 

Some alder pockets. Other areas in need of treatment to 

reduce density and Thin to increase structural and vegetative 

diversity. Variable buffer with hydrologist approval on 

layout.

4 172 100-172

25 105 13.9 10.0

3 172 >100

Thin to increase species and structural diversity. Shade and 

diversity protection in inner riparian. Large wood placement 

in stream. Instability concerns. Soils scientist to assist with 

layout to avoid areas of instability.

4 172 >30

Thin to increase species and structural diversity. Thin for 

Thin to increased tree vigor and stability. Soils scientist to 

assist with layout to avoid areas of instability.
Hwy 46 FEIS Appendix 

330

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

26 50 4.6 1.5 4 172 30

Thin to increase species and structural diversity. Consider 

adding LWD for sediment storage from above with fall and 

leave treatment under KV/stewardship.

27 122 15.0 5.1

3 172 100

Density reduction while protecting stream shade and 

diversity. Opportunity to Thin to increase large wood 

component instream.

4 172 100 Thin to reduce density and increase diversity. Post-sale 

opportunity to increase large wood component instream.

28 117 18.3 3.8

2 172 Healthy riparian, no treatment needed 1st site tree potential. 

Thin outer RR to maintain diversity.

4 172 172 Healthy riparian, no treatment needed 1st site tree potential

29 93 6.7 2.4

2 344 172 Healthy riparian, no treatment needed in 1st site tree potential. 

Trees to be used for fish logs (future restoration work).

4 172 172 Healthy riparian, no treatment needed.

30 50 3.4 3.1 4 172 30 Thin to increase structural and vegetative diversity

31 114 10.4 4.9 2 344 172 Thin to increase structural and vegetative diversity in outer 

RR

32 112 8.7 6.1

3 172 80

Thin to increase structural and vegetative diversity. Protect 

primary shade zone, large wood recruitment and channel 

stability.

4 172 30-60 Thin to increase structural and vegetative diversity. Protect 

large wood recruitment and channel stability.

32a 96 4.8 2.6 4 172 30-60 Meadow restoration and channel stability protection

33 36 9.2 7.1

3 172 60 Thin to increase structural and vegetative diversity. Protect 

primary shade zone.

4 172 30 Thin to increase structural and vegetative diversity

34 31 3.4 3.0 4 172 30

Thin to increase structural and vegetative diversity. Protect 

groundwater and wet areas. Also has a wet meadow 100’ 

buffer. 

35 30 6.1 0.0 3 172 172 No treatment in RR. Protect diversity and shallow 

groundwater around streams. Includes 100’ SHAB buffers.

38 34 4.6 0.0 4 172 172 No treatment in RR. Old plantation that could use treatment, 

but has stability concerns. 

40 223 1.8 1.8 2 344 172 Minimum stream buffer. May need additional buffer width 

for stability. Consult with Soils Scientist at layout. 

41 108 6.3 4.6 4 172 60 Very dense stand, Thin to increase structural and species 

diversity
Hwy 46 FEIS Appendix 

331

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

42 44 16.3 9.3

3-E 172 172

No treatment in RR. Mansfield Slide Unit: Minimum stream 

buffer. May need additional buffer width for stability. 

Soils/geology will assist with layout. 

3-SW 172 60 Thin to increase structural and vegetative diversity. Protect 

primary shade zone.

4-E 172 172 No treatment in RR. May need additional buffer width for 

stability. Soils/geology will assist with layout.

4-W 172 30 Minimum stream buffer. May need additional buffer width 

for stability. Soils/geology will assist with layout

44 51 5.4 2.8

2 344 100

Thin to increase structural and vegetative diversity. Protect 

primary shade zone and large wood recruitment for fish 

bearing stream.

4 172 30

Not meeting ACSO’s. Thin to increase structural and 

vegetative diversity. Underplant with mixed conifer and 

hardwoods. 

45 55 8.2 2.3

3 172 100 Very dense stand. Not meeting ACSO’s; Treat to Thin to 

increase stand vigor and structural and vegetative diversity 

while protecting water quality and stream channels from 

potential drainage concerns.

4 172 100

47 44 29.9 20.2

3 172 60

Thin to increase structural and vegetative diversity. 

Opportunity for post-sale fall and leave or tree-tipping to 

release hardwoods and increase large wood component.

4 172 30 Thin to increase structural and vegetative diversity.

48 26 5.5 4.1 4 172 30 Thin to increase structural and vegetative diversity. Protect 

groundwater and wet areas. Also has a 100’ SHAB buffer.

51 42 12.5 10.1 4 172 30

Thin to increase structural and vegetative diversity. Good 

opportunity for small gaps w/in outer RR or post-sale project 

to release hardwoods.

52 28 3.7 2.5 3 172 60 Very dense stand. Thin to increase structural and species 

diversity.

53 40 10.8 3.7

3 172 172

No treatment in RR. Minimum full site tree potential buffer 

to protect against stability issues in NE part of unit. 

Soils/Geology may assist with layout if needed.

4 172 60 Very dense stand. Thin to increase structural and species 

diversity and protect channel stability. 

55 43 12.3 8.7

3 172 60

Thin to increase structural and vegetative diversity. Protect 

primary shade zone. Unit also includes a 100’ buffer around 

the seep.

4 172 30 Thin to increase structural and vegetative diversity.
Hwy 46 FEIS Appendix 

332

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

58 42 0.7 0.7 3 172 60

Thin to increase structural and vegetative diversity. Protect 

primary shade zone. Stream and no-harvest buffer are outside 

of unit boundary.

60 29 2.1 1.9 4 172 30 Thin to increase structural and vegetative diversity.

61 39 13.6 11.3 4 172 30 Prior managed and very dense. In need of thinning for 

structural and species diversity.

62 41 22.5 14.7

3 172 60 Thin to increase structural and vegetative diversity. Protect 

primary shade zone and sediment filtration.

4 172 30 Thin to increase structural and vegetative diversity.

64 52 48.8 29.2

3 172 60 Thin to increase structural and vegetative diversity. Protect 

primary shade zone and sediment filtration.

4 172 30 Thin to increase structural and vegetative diversity.

69 54 8.0 4.4

3 172 60 Thin to increase structural and vegetative diversity, and 

protect primary shade zone. Addtl 100’ buffer on SHAB.

4 172 30 Thin to increase structural and vegetative diversity.

71 37 4.8 4.0 4 172 30 Thin to increase structural and species diversity. Protect 

shallow water table.

73 48 29.2 23.2 4 172 30 Thin to increase structural and species diversity. Protect 

shallow water table. 

74 50 36.6 17.1

3 172 100

No equipment or commercial harvest within 100’ of stream. 

Fall and leave or tree tipping recommended along Cultus 

Creek for sediment storage (separate KV or stewardship).

4 172 60

Thin to increase structural and species diversity with thinning

up to 60 feet from channel on the north side of channel, using 

the top of slope as a buffer edge. Do not treat the south slope. 

Recommend tipping some trees into stream channel to 

improve stability as post-sale opportunity.

75 33 14.5 7.3 4 172 30

Improve ACSO’s: Thin to increase structural and species 

diversity. Protect shallow groundwater. 100’ buffer on 

SHABs.

77 31 6.7 5.1 4 172 30 Thin to increase structural and vegetative diversity.

82 67 2.8 2.5 4 172 30 Thin to increase structural and vegetative diversity.

83 115 37.9 26.4

2 344 100* Thin to increase structural and vegetative diversity. Protect

primary shade zone and LWD recruitment. Opportunity to 

add wood instream post-sale. *Due to 2017 Scorpion fire 

encroachment in Riparian Reserves, RR treatment needs 

3 172 60*

4 172 30*
Hwy 46 FEIS Appendix 

333

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

No-

Harvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

and final buffer determinations will be made prior to 

layout. Consultation with hydrologist required.

84 125 52.8 29.0

2 172 172 Achieving ACSO’s. Thin to increase structural and vegetative 

diversity in outer RR.

3 172 60 Thin to increase structural and vegetative diversity. Protect

primary shade zone

4 172 30-60 Thin to increase structural and vegetative diversity.

89 450 1.4 1.24 172 30 Thin to increase structural and vegetative diversity 

(understory enhancement).

93 140 12.57.8 4* 172 60* Thin to increase structural and vegetative diversity. Protect 

instability at lower end with SHAB buffer. *Stream recorded 

as intermittent during stream survey, but should be confirmed 

at layout if perennial or intermittent-->100’ buffer if 

perennial.

94 105 11.0 6.1 4* 172 60*

95 110 23.6 2.6

3 172 100

Thin to increase structural and vegetative diversity. Protect 

primary shade and wood recruitment. Buffer may need to be 

wider to protect stability by slump area. Soils/Geology will

assist with layout.

4 172 60

Thin to increase structural and vegetative diversity and wood 

recruitment. Buffer may need to be wider to protect stability 

by slump area. Soils/Geology will assist with layout.

96 145 3.6 1.23 172 100 Thin to increase structural and vegetative diversity. Protect 

primary shade and wood recruitment.

100 45 45.8 27.5

3 172 100

East-West Class 3: Treat riparian on N-side of stream-clumpy 

gappy fall and leave to 70-90 tpa to Thin to increase 

structural and species diversity and lwd instream.

3 172 60

Thin to increase structural and species diversity. Protect 

primary shade and accelerate wood recruitment. Treat Leone 

Crk and east trib Class 3’s above road

4 172 60 Thin to increase structural and species diversity. Protect 

primary shade and wood recruitment. 

110 40 30.1 17.4

3 172 60 Thin to increase structural and species diversity, and protect 

primary shade.

4 172 60 Thin to increase structural and species diversity. 

120 45 9.1 5.6

3 172 60 Thin to increase structural and species diversity, and protect 

primary shade.

4 172 30 Thin to increase structural and species diversity. 

130 47 16.3 10.33 172 60 Thin to increase structural and species diversity. Protect 

primary shade.
Hwy 46 FEIS Appendix 

334

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

4 172 30 Thin to increase structural and species diversity.

140 47 31.2 11.6 3 172 172 On way to achieving ACSO’s. Protect slope and channel 

stability. No treatment in RR.

150 118 10.5 6.6 2 344 172 On way to achieving ACSO’s in 1st STP. Thin to increase

structural and species diversity in outer RR.

160 45 8.1 6.4 4 172 30 Thin to increase structural and species diversity. Stream 

location may need additional verification at layout.

170 No 

data 73.8 46.7 1 344 100*

Fuels unit: reduce fuel loading in RR near communities. 

Protect riparian features. Work with hydro/fish at layout 

where in RR fire can back into.

180 35 8.5 6.8 2 344 172

Meeting ACSO’s along most of Hill Creek. Unit boundary is 

right around 1st STP. At unit boundary stand is old plantation, 

very dense monoculture and needs treatment to increase 

diversity. 

190 45 33.4 19.8

2 344 100

Meeting ACSO’s in places and not in others, like north part. 

Treat streamside area along Hill Creek lightly for hardwood 

release with fall and leave. Protect stream shade and areas 

meeting ACSO’s. Thin to increase structural and species 

diversity in RR and streamside treatment areas. 

3 172 60 Thin to increase structural and species diversity. Protect 

primary shade.

4 172 30-200*

Minimum buffer to increase structural and species diversity. 

*Stream buffer connected to 100’ buffers around skunk 

cabbage swamps. Likely very little treatment inside RR.

200 45 11.8 6.5 3 172 60 Thin to increase structural and species diversity. Protect 

primary shade and wood recruitment.

210 No 

data 0.4 0.4

2 344 172

Fuels unit: Allow low intensity fire to back into RR. 4 172 50

220 45 40.8 13.9

2 344 172 Achieving ACSO’s in 1st STP of Hill Creek. Thin to increase 

structural and species diversity in 2nd STP.

4 172 60 Thin to increase structural and species diversity. Protect 

LWD source.

250 44 0.2 0.0 4 172 200+ Class 4 stream protected from harvest by 100’ SHAB buffer 

around wet meadow.

270 275 2.9 2.1

1 344 250-344

3 172 100 Fuels unit: Allow low intensity fire to back into RR. 

4 172 50
Hwy 46 FEIS Appendix 

335

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

290 47 34.0 3.5

3 172 172 Achieving ACSO’s. No treatment in RR.

4 172 60 Not achieving ACSO’s; Thin to increase species and 

structural diversity. Protect near channel stability. 

300 40 41.2 20.3

3 172 60-172

Skunk Creek Riparian area functioning in 1st STP. Protect 

ACSO’s. Thin to increase structural and species diversity in 

outer RR. 

4 172 30 Thin to increase structural and species diversity and channel 

stability and LWD source.

310 50 4.1 2.8

3 172 172 Skunk Creek Riparian area functioning in 1st STP; Protect 

ACSO’s.

4 172 30 Thin to increase species and structural diversity.

320 30 19.8 10.3

3 172 172 Full STP buffer on Skunk Creek, protect riparian achieving 

ACSO’s – keep harvest above the road. No treatment in RR.

3 172 60 Thin to increase species and structural diversity.

4 172 30*

Thin to increase species and structural diversity. Northernmost Cls 4 stream requires Hydrologist and Soil Scientist 

input at layout to avoid unstable slopes.

340 45 18.2 8.7 2 344 172+

No harvest w/in first STP, where achieving ACSO’s and 

rocky. Thinning in 2nd STP in southern part of unit where 

trees are smaller and denser to increase structural and species 

diversity.

350 39 13.7 5.5

2 344 172 Full STP on fish bearing Devils Creek. Thin to increase stand 

health in outer RR.

3 172 100

Plantation, not achieving ACSO’s. Thin to increase species 

and structural diversity in outer RR. Protect stream shade and 

large wood recruitment.

4 172 60 Thin to increase species and structural diversity, while 

protecting steep slopes and channel stability.

360 40 12.2 7.8

2 344 172 Increasing structural diversity in 2nd STP.

4 172 30-60

Not achieving ACSO’s. Thin to increase riparian area species 

and structural diversity. Wider buffer on north-most Class 4 

stream due to post-fire debris flow susceptibility from 

upstream.

370 34 23.1 15.3

2 344 172 Achieving ACSO’s, protect 1st STP. Thin to increase species 

and structural diversity om outer RR.

4 172 30 Not achieving ACSO’s, Thin to increase species and 

structural diversity.
Hwy 46 FEIS Appendix 

336

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

380 39 24.1 16.8

2 344 172 Full STP buffer to protect ACSO’s in Devil’s Creek riparian. 

Thin to increase species and structural diversity in outer RR.

3 172 60 Thin to increase species and structural diversity

4 172 30

Thin to increase species and structural diversity. *Several 

streams go subsurface mid-way down the unit, indicating 

shallow groundwater. Restrict equipment use in lower part of 

unit. Rec’d some hardwood release along Class 3 stream as 

post-sale opportunity..

390 37 8.0 3.8

3 172 172 Achieving ACSO’s. No treatment in RR.

4 172 30 Thin to increase species and structural diversity. *See Unit 

380

400 47 20.8 10.9 4 172 30 Thin to increase species and structural diversity. *See Unit 

380

420 40 2.6 1.8

2 344 172

Full site tree potential on N. Fk Breitenbush River. Protect 

ACSO’s. Thin to increase species and structural diversity in 

outer RR.

4 172 60 Thin to increase species and structural diversity. Protect 

channel stability.

430 40 9.1 5.5

2 344 172

Full site tree potential on N. Fk Breitenbush River. Protect 

ACSO’s. Thin to increase species and structural diversity in 

outer RR.

3 172 100

Historic and re-occuring debris flow 100' no-harvest buffer 

depending on debris. Fall and leave within NH buffer for lwd 

recruitment source to N. Fk Breit downslope. Also thin to 

increase species and structural diversity.

440 35 8.9 1.3 2 344 220+

Minimum buffer of 60 ft from edge of alder patch along the 

N.Fork Breitenbush riparian area, plus additional 100 ft 

buffer around SHAB/swamp. 

450 34 5.6 4.5 4 172 30 Thin to increase species and structural diversity.

460 43 3.9 2.5

3 172 60 Thin to increase species and structural diversity. Class 3 

streams go subsurface above road. All streams to be treated 

as perennial. Thin to increase riparian species and structure. 

Protect shallow groundwater/subsurface flow.

4 172 60

470 44 6.9 2.7

2 344 100 Crown Creek achieving ACSO’s in inner riparian. Thin to 

increase structure and species diversity in outer RR.

3 172 60 Thin to increase structural and species diversity. Protect 

primary shade, wood recruitment, and shallow groundwater. 4 172 60
Hwy 46 FEIS Appendix 

337

Unit Stand 

Age

Riparian Reserve 

Acres Stream 

Class

Riparian 

Reserve 

Width 

(feet)

NoHarvest 

Buffer 

(feet)

Rationale for Treatment within Riparian Reserve Total in 

Unit

Proposed 

Treatment

480 43 7.0 4.4 3 172 60-172*

Lower part near road meeting ACSO's or close to ->full STP 

buffer. Upper section is heading towards ACSO's but should 

have 'treatment to 60’ no-harvest buffer to reduce density and 

Thin to increase stand vigor. Variable buffer on layout.

490 45 7.1 5.0

3 172 60

Additional 60’ buffer around wetlands in between units. Thin 

to increase species and structural diversity in RR outside of 

buffers, promote understory growth and protect primary 

shade and microclimate. 

4 172 30 Thin to increase species and structural diversity, promote 

understory growth. 

510 40 4.0 2.8

3 172 60

Additional 60’ buffer around wetlands in between units. Thin 

to increase species and structural diversity in RR outside of 

buffers, promote understory growth and protect primary 

shade and microclimate. 

4 172 30

Thin to increase species and structural diversity, promote 

understory growth. 

520 45 33.3 24.3

3 172 60 Fall and leave and hardwood release treatment within no 

commercial harvest buffer to Thin to increase diversity of 

stand and large wood component instream. 4 172 30

530 39 2.1 0.5 4 172 60 Thin to increase species and structural diversity, promote 

understory growth.

540 40 1.4 1.4 4 172 172 Very diverse stand with small trees and good species 

diversity. No treatment needed at this time.