Craggy CWE HUC 14 ERA

Page 1 of 14

Drainage Code Drainage Name

Threshold of 

Concern (% 

drainage)

Area of 

Drainage 

(Acres)

Past Harvest 

and Fire (ERA's)

Road System 

(ERA's)

Total Current 

ERA

Percent ERA 

contributed to 

Past Harvest 

and Wildfires

Percent ERA 

contributed to 

Road System

Total 

Current 

ERA Risk 

Ratio

Estimated ERA 

from Future 

Actions

Total 

Cumulative 

Risk Ratio

18010206080101 Upper Humbug Creek 9.5% 8,037 22 205 227 10% 90% 0.30 0.30

18010206080102 Middle Fork Humbug Creek 10.0% 4,978 8 136 145 6% 94% 0.29 0.29

18010206080103 Clear Creek 10.5% 2,781 69 32 101 68% 32% 0.35 0.35

18010206080104 Lower Humbug Creek 10.5% 7,830 9 116 125 7% 93% 0.15 11.45 0.17

18010207050203 Greenhorn Creek 9.0% 7,734 330 144 474 70% 30% 0.68 0.68

18010207050204 Yreka City-Yreka Creek 12.0% 7,054 13 181 194 7% 93% 0.23 0.23

18010207050205 Long Gulch 11.0% 2,834 29 55 84 34% 66% 0.27 0.27

18010207050206 Rocky Gulch-Yreka Creek 11.5% 2,102 3 28 31

Drainage Code Drainage Name

Harvest for 

Alternative 2 

(ERA's)

Prescribed 

Fire for 

Alternative 2 

(ERA's)

Mastication for 

Alternative 2 

(ERA's)

Fuel Breaks for 

Alternative 2 

(ERA's)

PCT for 

Alternative 2 

(ERA's)

New Landing 

Construction 

(ERA's)

Temporary 

Roads 

Alternative 2 

(ERA's)

Legacy Site 

Treatment

Project Total for 

Alternative 2 

Proposal

Total ERA for 

Alternative 2 

(including 

current) 

(ERA's)

Alternative 2 

Risk Ratio

18010206080101 Upper Humbug Creek 236 62 2 0 3 4 1.1 -17.0 292 519 0.68

18010206080102 Middle Fork Humbug Creek 62 1 0 1 2 0.1 -10.8 55 200 0.40

18010206080103 Clear Creek 83 4 0 0 1 88 189 0.65

18010206080104 Lower Humbug Creek 58 12 8 0 1 0.1 -8.0 71 196 0.24

18010207050203 Greenhorn Creek 18 2 13 0 34 508 0.73

18010207050204 Yreka City-Yreka Creek 16 0 0 16 210 0.25

18010207050205 Long Gulch 10 1 9 0 20 104 0.34

18010207050206 Rocky Gulch-Yreka Creek 8 0 8 39

Drainage Code Drainage Name

Harvest for 

Alternative 3 

(ERA's)

Prescribed 

Fire for 

Alternative 3 

(ERA's)

Mastication for 

Alternative 3 

(ERA's)

Fuel Breaks for 

Alternative 3 

(ERA's)

PCT for 

Alternative 3 

(ERA's)

New Landing 

Construction 

(ERA's)

Temporary 

Roads 

Alternative 3 

(ERA's)

Legacy Site 

Treatment

Project Total for 

Alternative 3 

Proposal

Total ERA for 

Alternative 3 

(including 

current) 

(ERA's)

Alternative 3 

Risk Ratio

18010206080101 Upper Humbug Creek 191 62 2 0 5 4 1.0 -17.0 248 475 0.62

18010206080102 Middle Fork Humbug Creek 42 1 0 1 2 0.1 -10.8 36 181 0.36

18010206080103 Clear Creek 71 4 0 0 1 76 178 0.61

18010206080104 Lower Humbug Creek 41 17 7 0 0 1 -8.0 57 182 0.22

18010207050203 Greenhorn Creek 18 2 13 0 34 508 0.73

18010207050204 Yreka City-Yreka Creek 10 0 0 10 204 0.24

18010207050205 Long Gulch 10 1 6 0 18 102 0.33

18010207050206 Rocky Gulch-Yreka Creek 8 0 8 39

Alternative 3 ERA

Future

Alternative 2 ERA

Current ERA (Affected Environment)
Craggy CWE HUC 14 ERA

Page 2 of 14

Drainage Code Drainage Name

Pre-fire ERA ERA added 

by Fire

Total ERA under 

Affected 

Environment

ERA Risk Ratio 

Affected 

Environment

Alt 2 ERA 

(indirect 

effects)

Total Project 

ERA

Alt 2 ERA Risk 

Ratio (Indirect 

Effects)

Future 

Action ERA

Cumulative ERA Cumulative 

ERA Risk Ratio

18010207050206 Rocky Gulch-Yreka Creek 92 32 124 0.51 8 133 0.55 0 133 0.55

Drainage Code Drainage Name

ERA due to a 

Potential 

Wildfire (NoAction)

ERA due to 

a Potential 

Wildfire ERA 

(with Alt3)

Risk Ratio NoAction & 

Wildfire

Added risk ratio 

no-action & 

wildfire

18010206080101 Upper Humbug Creek 592 200 1.07 0.78

18010206080102 Middle Fork Humbug Creek 325 19 0.94 0.65

18010206080103 Clear Creek 222 74 1.11 0.76

18010206080104 Lower Humbug Creek 774 47 1.09 0.94

18010207050203 Greenhorn Creek 724 22 1.72 1.04

18010207050204 Yreka City-Yreka Creek 205 10 0.47 0.24

18010207050205 Long Gulch 239 15 1.04 0.77

18010207050206 Rocky Gulch-Yreka Creek 206 8 0.98 0.98

Fire Scenario

Data not available to model cumulative watershed effects: soils mapping incomplete. Results not valid

Estimates for Rocky Gulch with Grade Fire Effects

Assumptions are that 200 acres were burned with high or moderate severity - used 

Long Gulch as baseline and added fire effects to it.

Coefficient =0.16
Craggy CWE HUC 14 GEO

Page 3 of 14

Drainage Code Drainage Name

Background 

Landslide 

Volume 

(yd3/decade)

Past Harvest 

and Wildfire 

(yd3/ decade)

Road System 

(yd3/ decade)

Total Current 

Landslide Volume 

(includes 

background) 

(yd3/ decade)

Percent 

Landslide 

Volume 

contributed to 

Past Harvest 

and Wildfire

Percent 

Landslide 

Volume 

contributed to 

Road System

Total Current 

GEO Risk 

Ratio

Estimated 

Landslide 

Volume from 

Future Actions 

(yd3/ decade)

Total Cumulative 

Risk Ratio

18010206080101 Upper Humbug Creek 12,286 410 33,304 45,999 1% 72% 1.37 1.37

18010206080102 Middle Fork Humbug Creek 4,967 204 10,677 15,847 1% 67% 1.10 1.10

18010206080103 Clear Creek 4,240 1,028 4,164 9,432 11% 44% 0.61 0.61

18010206080104 Lower Humbug Creek 8,051 55 8,397 16,503 0% 51% 0.52 101.55 0.53

18010207050203 Greenhorn Creek 8,729 2,464 6,046 17,239 14% 35% 0.49 0.49

18010207050204 Yreka City-Yreka Creek 4,680 39 2,678 7,397 1% 36% 0.29 0.29

18010207050205 Long Gulch 1,019 81 1,127 2,227 4% 51% 0.59 0.59

18010207050206 Rocky Gulch-Yreka Creek 534 20 533 1,087 2% 49% 0.52 0.52

Drainage Code Drainage Name

Harvest for 

Alternative 2 

(yd3/ decade)

Prescribed Fire 

for Alternative 2 

(yd3/ decade)

Mastication for 

Alternative 2 

(yd3/ decade)

Fuel Breaks for 

Alternative 2 

(yd3/ decade)

PCT for 

Alternative 2 

(yd3/ decade)

New Landing 

Construction 

(yd3/ decade)

Temporary 

Roads 

Alternative 2 

(yd3/ decade)

Legacy Site 

Treatment

Total landslide 

Volume for 

Alternative 2 (yd3/ 

decade)

Alternative 2 Risk 

Ratio

18010206080101 Upper Humbug Creek 0 0 0 0 0 97.2 56.3 -2280.8 -2127.3 1.29

18010206080102 Middle Fork Humbug Creek 0 0 0 0 50.7 1.3 -2112.3 -2060.3 0.89

18010206080103 Clear Creek 0 0 0 0 59.7 0.0 59.7 0.62

18010206080104 Lower Humbug Creek 0 0 0 0 56.3 2.0 -1097.8 -1039.6 0.47

18010207050203 Greenhorn Creek 0 0 0 0 0.0 0 0.49

18010207050204 Yreka City-Yreka Creek 0 0 0 0 0 0.29

18010207050205 Long Gulch 0 0 0 0 0 0 0.59

18010207050206 Rocky Gulch-Yreka Creek 0 0 0 0 0.52

Drainage Code Drainage Name

Harvest for 

Alternative 3 

(yd3/ decade)

Prescribed Fire 

for Alternative 3 

(yd3/ decade)

Mastication for 

Alternative 3 

(yd3/ decade)

Fuel Breaks for 

Alternative 3 

(yd3/ decade)

PCT for 

Alternative 3 

(yd3/ decade)

New Landing 

Construction 

(yd3/ decade)

Temporary 

Roads 

Alternative 3 

(yd3/ decade)

Legacy Site 

Treatment

Total landslide 

Volume for 

Alternative 3 (yd3/ 

decade)

Alternative 3 Risk 

Ratio

18010206080101 Upper Humbug Creek 0 0 0 0 0 80 38.5 -2280.8 -2162.26 1.28

18010206080102 Middle Fork Humbug Creek 0 0 0 0 50.68 1.3 -2112.3 -2060.33 0.89

18010206080103 Clear Creek 0 0 0 0 59.7 0.0 59.7 0.62

18010206080104 Lower Humbug Creek 0 0 0 0 56.26 -1097.8 -1041.55 0.47

18010207050203 Greenhorn Creek 0 0 0 0 0.0 0 0.49

18010207050204 Yreka City-Yreka Creek 0 0 0 0 0 0.29

18010207050205 Long Gulch 0 0 0 0 0 0 0.59

18010207050206 Rocky Gulch-Yreka Creek 0 0 0 0 0.52

Future

Alternative 2 Landslide Loss

Alternative 3 Landslide Loss

Current Landslide Loss (Affected Environment)
Craggy CWE HUC 14 GEO

Page 4 of 14

Drainage Code Drainage Name

Total GEO prefireGEO added by 

Fire

Total GEO 

under Affected 

Environment

Risk Ratio 

Affected 

Environment

Alt 2 ERA 

(indirect effects)

Total Project 

GEO

Alt 2 GEO Risk 

Ratio (Indirect 

Effects)

Future Action 

GEO Cumulative GEO

Cumulative Risk 

Ratio

18010207050206 Rocky Gulch-Yreka Creek 2,227 320 2,547 0.75 0 2,547 0.75 0 2,547 0.75

Drainage Code Drainage Name

Fire / No Action - 

Landslide 

Volume

Landslide 

Volume- Fire 0-

5 yrs. after 

treatment

Risk Ratio NoAction & FireRisk Ratio Alt 3 

w/ Fire

18010206080101 Upper Humbug Creek 70,222 29,197 4.2298 1.97

18010206080102 Middle Fork Humbug Creek 13,787 11,401 2.4833 1.54

18010206080103 Clear Creek 10,596 8,341 1.8616 1.1

18010206080104 Lower Humbug Creek 20,853 18,089 1.8198 1.09

18010207050203 Greenhorn Creek 11,062 9,543 1.1211 0.53

18010207050204 Yreka City-Yreka Creek 4,486 4,256 0.7696 0.25

18010207050205 Long Gulch 3,198 2,630 2.162 1.38

18010207050206 Rocky Gulch-Yreka Creek 2,588 2,179 2.938 2.06

No high or medium intensity harvest levels planned in project, thus low landslide risk

This project will serve to reduce landslide volumes by reducing landslide risk from the existing road disturbance

Estimates for Rocky Gulch with Grade Fire Effects

Coefficient = 1.6 

Assumptions are that 200 acres were burned with high or moderate severity 

- used Long Gulch as baseline and added fire effects to it. [GEO = yd3/ 

decade]

Data not available to model cumulative watershed effects: soils mapping incomplete. Results not valid

Fire Scenario
Craggy CWE HUC 14 USLE

Page 5 of 14

Drainage Code Drainage Name

Background 

Soil Erosion 

Delivery (yd3/ 

year)

Past Harvest 

and Wildfire 

(yd3/ year)

Road System 

(yd3/ year)

Total Current 

Soil Erosion 

Delivery 

(includes 

background)

Percent ERA 

contributed to 

Past Harvest 

and Wildfire

Percent ERA 

contributed to 

Road System

Total Current 

USLE Risk Ratio

Estimated Soil 

Erosion from 

Future Actions 

(yd3/ year)

Total Cumulative 

Risk Ratio

18010206080101 Upper Humbug Creek 147 1.0 208 355 0.3% 58.5% 0.36 0.36

18010206080102 Middle Fork Humbug Creek 74 0.0 110 185 0.0% 59.7% 0.37 0.37

18010206080103 Clear Creek 36 0.1 35 71 0.2% 49.0% 0.24 0.24

18010206080104 Lower Humbug Creek 64 0.0 80 144 0.0% 55.6% 0.31 1.3 0.32

18010207050203 Greenhorn Creek 76 0.0 135 211 0.0% 64.0% 0.44 0.44

18010207050204 Yreka City-Yreka Creek 24 0.0 64 88 0.0% 72.7% 0.66 0.66

18010207050205 Long Gulch 16 0.0 42 58 0.0% 71.9% 0.64 0.64

18010207050206 Rocky Gulch-Yreka Creek 9 0.0 9 18 0.0% 51.4% 0.26 0.26

Drainage Code Drainage Name

Harvest for 

Alternative 2 

(yd3/ year)

Prescribed Fire 

for Alternative 

2 (yd3/ year)

Mastication for 

Alternative 2 

(yd3/ year)

Fuel Break for 

Alternative 2 

(yd3/ year)

PCT for 

Alternative 2 

(yd3/ year)

New Landing 

Construction (yd3/ 

year)

Temporary Roads 

Alternative 2 (yd3/ 

year)

Legacy Site 

Treatment

Total Soil Loss for 

Alternative 2 (yd3/ 

year)

Alternative 2 

Risk Ratio

18010206080101 Upper Humbug Creek 51.5 0.0 0.0 0.0 0.0 2.8 2.0 -23.6 32.7 0.41

18010206080102 Middle Fork Humbug Creek 13.2 0.0 0.0 0.0 2.3 0.1 -9.0 6.6 0.39

18010206080103 Clear Creek 14.5 0.0 0.0 0.0 0.2 14.7 0.34

18010206080104 Lower Humbug Creek 5.3 0.0 0.0 0.0 0.1 0.0 -10.0 -4.5 0.30

18010207050203 Greenhorn Creek 5.9 0.0 0.0 0.0 0.0 5.9 0.46

18010207050204 Yreka City-Yreka Creek 0.0 0.0 0.0 0.66

18010207050205 Long Gulch 1.0 0.0 0.0 0.0 1.0 0.66

18010207050206 Rocky Gulch-Yreka Creek 0.0 0.0 0.0 0.26

Drainage Code Drainage Name

Harvest for 

Alternative 3 

(yd3/ year)

Prescribed Fire 

for Alternative 

3 (yd3/ year)

Mastication for 

Alternative 3 

(yd3/ year)

Fuel Break for 

Alternative 3 

(yd3/ year)

PCT for 

Alternative 3 

(yd3/ year)

New Landing 

Construction (yd3/ 

year)

Temporary Roads 

Alternative 3 (yd3/ 

year)

Legacy Site 

Treatment

Total Soil Loss for 

Alternative 3 (yd3/ 

year)

Alternative 3 

Risk Ratio

18010206080101 Upper Humbug Creek 40.8 0.0 0.0 0.0 0.0 2.2 1.6 -23.6 21.1 0.39

18010206080102 Middle Fork Humbug Creek 10.3 0.0 0.0 0.0 2.3 0.1 -9.0 3.6 0.38

18010206080103 Clear Creek 11.5 0.0 0.0 0.0 0.2 11.7 0.32

18010206080104 Lower Humbug Creek 3.4 0.0 0.0 0.0 0.0 0.1 -10.0 -6.4 0.29

18010207050203 Greenhorn Creek 5.9 0.0 0.0 0.0 5.9 0.46

18010207050204 Yreka City-Yreka Creek 0.0 0.0 0.0 0 0.66

18010207050205 Long Gulch 1.0 0.0 0.0 0.0 1 0.66

18010207050206 Rocky Gulch-Yreka Creek 0.0 0.0 0 0.26

Current Soil Erosion (Affected Environment) Future

Alternative 2 Soil Erosion

Alternative 3 Soil Erosion
Craggy CWE HUC 14 USLE

Page 6 of 14

Drainage Code Drainage Name

Total USLE prefireUSLE added by 

Fire

Total USLE 

under Affected 

Environment

Risk Ratio 

Affected 

Environment

Alt 2 USLE 

(indirect 

effects)

Total Project 

USLE

Alt 2 USLE Risk 

Ratio (Indirect 

Effects)

Future Action 

USLE

Cumulative USLE Cumulative Risk 

Ratio

18010207050206 Rocky Gulch-Yreka Creek 58 2.5 60 1.36 0 60 1.36 0 60 1.36

Drainage Code Drainage Name

Soil Loss - No 

Action - Fire

Soil Loss - Fire 

0-5 yrs. after 

Alt 3 

Treatment

Risk Ratio - No 

Action with Fire

Risk Ratio Alt 3 

with Fire

18010206080101 Upper Humbug Creek 1,415 842 2.77 1.22

18010206080102 Middle Fork Humbug Creek 723 559 2.80 1.64

18010206080103 Clear Creek 363 297 2.77 1.90

18010206080104 Lower Humbug Creek 828 723 3.55 2.55

18010207050203 Greenhorn Creek 824 687 3.16 2.03

18010207050204 Yreka City-Yreka Creek 211 200 2.86 1.83

18010207050205 Long Gulch 180 152 3.40 2.10

18010207050206 Rocky Gulch-Yreka Creek 101 90 3.12 2.29

Estimates for Rock Gulch with Grade Fire Effects

Fire Scenario

Coefficient = 0.17, 0.7 conversion factor and a delivery factor of .10

Data not available to model cumulative watershed effects: soils mapping incomplete. Results not Valid

Assumptions are that 200 acres were burned with high or moderate severity - used Long 

Gulch as baseline and added fire effects to it. [USLE = yd3/year]
Craggy CWE HUC 10 Results

Page 7 of 14

Watershed Code Watershed Name TOC HUC 10 Area Current ERA 

Total

Current Risk 

Ratio Future Total ERA Alt. 2 Total ERA Alt. 3

Risk Ratio 

w/ Alt2

Risk Ratio w/ 

Alt3

1801020608 Humbug Creek-Klamath River 11% 68,023 2,181 0.30 11 507 418 0.37 0.36

1801020705 Yreka Creek-Shasta River 32,737 78 70

Watershed Code Watershed Name Sum of 

Background

Sum of Total 

Current CWE

Current Risk 

Ratio Future

Total Landslide 

Volume Alt. 2 

(yd3/ decade)

Total Landslide 

Volume Alt. 3 

(yd3/ decade)

Risk Ratio w/ 

Alt2

Risk Ratio 

w/ Alt3

1801020608 Humbug Creek-Klamath River 78,110 219,863 0.91 102 -5167 -5204 0.87 0.87

1801020705 Yreka Creek-Shasta River 23,659 42,567 0 0

Watershed Code Watershed Name Sum of 

Background

Sum of Total 

Current CWE

Current Risk 

Ratio Future Total Soil Erosion Alt. 2 (yd3/ yr.)

Total Soil Erosion 

Alt. 3 (yd3/ yr.)

Risk Ratio w/ 

Alt2

Risk Ratio 

w/ Alt3

1801020608 Humbug Creek-Klamath River 700 2,029 0.47 1 50 30 0.49 0.49

1801020705 Yreka Creek-Shasta River 169 526 7 7

ERA

Watershed Code Watershed Name TOC HUC 12/14 Area

Current ERA 

Total

180102060801 Humbug Creek 10% 23,626 652

180102060802 Ash Creek-Klamath River 12% 23,430 723

180102060803 Empire Creek-Klamath River 10% 20,967 806

18010207050201 Upper Yreka Creek 10% 8,141 380

18010207050202 Juniper Creek 12% 4,873 70

180102070502 Yreka Creek 11% 32,738 1,474

GEO

HUC 12/14 HUC 12/14 Name Background

Harvest and Fire 

Current

Harvest 

Future Road Current Road Treatments Total CWE Total Current

180102060801 Humbug Creek 27,710 92,882 65,172

180102060802 Ash Creek-Klamath River 19,298 43,726 24,428

180102060803 Empire Creek-Klamath River 31,102 83,255 52,153

18010207050201 Upper Yreka Creek 5,760 1,876 0.0 1,766 0.0 9,402 3,642

Other watersheds

ERA

GEO

USLE

Data not available to model cumulative watershed effects: soils mapping incomplete for some constituent watersheds
Craggy CWE HUC 10 Results

Page 8 of 14

18010207050202 Juniper Creek 3,042 123 0.0 982 0.0 4,147 1,105

180102070502 Yreka Creek 23,659 42,567 18,908

USLE

HUC 12/14 HUC 12/14 Name Background

Harvest and Fire 

Current

Harvest 

Future Road Current Road Treatments Total CWE Total Current

180102060801 Humbug Creek 290 794 504

180102060802 Ash Creek-Klamath River 172 386 215

180102060803 Empire Creek-Klamath River 238 849 611

18010207050201 Upper Yreka Creek 37 0.0 0.0 43 0.0 80 43

18010207050202 Juniper Creek 12 0.0 0.0 17 0.0 29 17

180102070502 Yreka Creek 169 526
Craggy CWE Watershed Crosswalk

Page 9 of 14

HUC10 code HUC10 name HUC12 code HUC12 name HUC14 code HUC14 name Drainage Area 

(acres)

18010206080101 Upper Humbug Creek 8,037

18010206080102 Middle Fork Humbug Creek 4,978

18010206080103 Clear Creek 2,781

18010206080104 Lower Humbug Creek 7,830

18010206080201 Ash Creek 3,641

18010206080202 Badger Creek-Klamath River 5,617

18010206080203 Lime Gulch 2,485

18010206080204 Dutch Creek 6,386

18010206080205 Cayuse Gulch-Klamath River 5,301

18010206080301 Empire Creek 5,774

18010206080302 Lumgrey Creek 5,496

18010206080303 Vesa Creek 3,141

18010206080304 Miller Gulch-Klamath River 6,557

18010207050201 Upper Yreka Creek 8,141

18010207050202 Juniper Creek 4,873

18010207050203 Greenhorn Creek 7,734

18010207050204 Yreka City-Yreka Creek 7,054

18010207050205 Long Gulch 2,834

18010207050206 Rocky Gulch-Yreka Creek 2,102

Sum = 32,737

Ash Creek-Klamath River

Humbug Creek

Empire Creek-Klamath River

1801020608 Humbug CreekKlamath River

180102060801

180102060802

180102060803

Yreka CreekShasta River 1801020705 180102070502 Yreka Creek

7th Field watersheds (HUC 14 codes) overlapping project area
Craggy CWE- ERA Threshold of Concern (TOC)

Page 10 of 14

HUC14 (7th -field)

code

Watershed

name

Acres

Beneficial 

uses

[B]

Channel

stability

[C]

Soil

erodibility

[E]

Hydrologic

response

[H]

Slope

stability

[S]

Watershed

sensitivity TOC

18010206080101 Upper Humbug Creek 8,037 3 3 3 4 2 24 9.5%

18010206080102 Middle Fork Humbug Creek 4,978 3 3 2 4 2 23 10.0%

18010206080103 Clear Creek 2,781 3 3 2 3 2 22 10.5%

18010206080104 Lower Humbug Creek 7,830 3 3 2 3 2 22 10.5%

18010206080201 Ash Creek 3,641 3 3 2 4 2 23 10.0%

18010206080202 Badger Creek-Klamath River 5,617 2 3 2 2 1 18 12.5%

18010206080203 Lime Gulch 2,485 2 3 2 3 1 19 12.0%

18010206080204 Dutch Creek 6,386 3 3 2 3 1 21 11.0%

18010206080205 Cayuse Gulch-Klamath River 5,301 2 3 2 2 2 19 12.0%

18010206080301 Empire Creek 5,774 3 3 2 4 2 23 10.0%

18010206080302 Lumgrey Creek 5,496 4 3 2 4 3 26 8.5%

18010206080303 Vesa Creek 3,141 2 3 2 3 2 20 11.5%

18010206080304 Miller Gulch-Klamath River 6,557 2 3 2 2 3 20 11.5%

Watershed ERA TOC (Threshold of Concern) Information Klamath National Forest - CWE2004 Project
Craggy CWE Metadata

Page 11 of 14

Treatment CWE Impacts Logging System Site Prep-Fuels

Underburn N <null> UB

Fuel Break N <null> HP

Mastication L <null> MC

Skyline/Endline/tethered systems L TR UB or HP depending if within 

planned underburn area

Ground-Based L TR

UB or HP depending if within 

planned underburn area

Vegetation Impacts Description

H High impacts; >60% BA removed, as in green 

tree retention

M Moderate impacts;, generally 30 to 60% BA 

removed, as in group selection

L Low impacts; generally <30% BA removed as 

in commercial thinning

N None or insignificant impacts

TR Tractor/Tethered

CA Cable

HE Helicopter

RO Roadside

FB Feller-buncher

TM Tractor-modified

<null> Not Logged

TP Tractor pile; entire unit

TB Tractor bunch; portion of unit

HP Hand pile

MC Masticate

BB Broadcast burn; unit burn (w/GTR)

JP Jack-pot burn

UB Underburn

<null> No site prep

Logging System

Site Prep - Fuels

Landings were assumed to be 0.5 acres in size. Existing landings were included in the current condition and new landings were included in the 

analysis separately.

Alt2_Treatments.shp and Alt3_Treatments were used as the input into the model along with silvicultural prescriptions in the project record as of 23 

Jan 2016.

This data is a compilation of the outputs of the ERA, GEO and USLE CWE models that were run by A. Bell and Andrew Mueller on 29 Apr 2016, and 

updated on June 16th, 2017 by Andrew Mueller to model the hydrologic stabilization and stormproofing of roads for the revised legacy site 

treatment plan proposed in Alternative 2 and 3 and to change logging system for skyline/endline to TR, in order to model potential ground-based 

disturbance from substitution of tethered harvester systems.

The model is not sensitive to and does not include effects of grazing, mining, recreation or special use permitting in the watershed. 

Forestwide CWE modelling 2012 (updated Nov. 18, 2014 by Angie Bell) was used to provide past/current/background conditions for watersheds 

other than the analysis watersheds; 2017 model results were used for the analysis HUC 14 (7th field) watersheds in Craggy.

Temporary Roads were assumed to be 16 feet wide, natural surface and outsloped. The model assumed that all temporary roads will be 

hydrologically stabilized per project design feature. 

If the GIS information had overlapping polygons, the action with the highest potential effect was modeled. So if the landings intersected a harvest 

unit the landing took precedence in the model. 

For harvest and non-commercial thinning units in the underburning blocks - the site preparation was assumed to be underburn; all others PCT & 

Handpile.

For mastication, vegetation impacts were considered to be low instead of insignificant, because of the planned application of mastication in 

predominately brush-dominated stands.
Craggy CWE Vegetation Management

Page 12 of 14

Forest Service Project or 

Timber Sale Name

Year decision 

signed or 

completed Acres

Misc. Harvest 1956-2010 5,678

McBaldy 2010 146

 5,824

Timber Harvest Plan (THP) 

Name or Number

THP year or 

comp date Acres

2-96-150 1998 22

Rice Long Gulch THP 1998 140

2-96-385 2000 148

2-95-255 2001 38

2-96-273 2001 56

Mill Creek THP 2001 642

Coreen THP 2002 269

2-96-336 2003 94

Badger Mtn THP 2003 22

Clear Creek THP 2003 318

Section 25 THP 2003 294

Hi Ridge THP 2005 81

Soap THP 2006 361

Fred Burton THP 2007 259

Mill THP 2007 44

2-07-081 2010 12

 2,799

TOTAL

TOTAL
Craggy CWE Wildfires

Page 13 of 14

Fire Name Fire Year Acres

China 2007 865

Grade Fire 2016 200
Craggy CWE Roads

Page 14 of 14

Road Ownership Maintenance Level Miles

County NA 40

FS Decommissioned NA 1

FS Unauthorized Routes NA 39

FS Motorized Trails NA 15

1 9

2 58

3 5

4 1

5 0

Temp Roads from recent projects NA 0

Private NA 85

State NA 11

258

FS - System

TOTAL