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THP Engineering Geologic Reviews

CGS staff conduct engineering geologic field reviews of select Timber Harvesting Plans (THP) as part of a multi-agency review team lead by the California Department of Forestry and Fire Protection (CDF). Upon completion of the field reviews, CGS staff prepare memoranda that summarize pertinent observations and recommendations made during the field review. These memoranda are submitted to CDF, the lead agency for timber harvest plan approval, for consideration as part of the THP review process.

Recently submitted THP engineering geologic review memoranda prepared by CGS staff are presented below. These memoranda are available for viewing on this web site for approximately 90 days after posting. If you are interested in one of the CGS memoranda that is more than 90 days old, please send an email with the THP number to: fwgp@consrv.ca.gov and we will email a PDF if available (THPs beginning in 2002) or direct you to CDF for a hard copy. For more information on the THP review process, go to CDF's web page.

THP Number

County

Location

CalWater Watershed ID

2-08-001

Butte

T21N, R6E, Sec.7; T22N, R6E, Sec 22,27; HB&M

Mosquito Creek(5518.110103)

Berry Creek(5518.110306)

Kelly Resevoir(5518.110102)

Mountain House Creek(5518.320702)

 

THP Number

County

Location

CalWater Watershed ID

1-08-110

Del Norte

T14N, R1E, Sec.4,5,7,8; T15N, R1E, Sec.28,29,30,32,33; HB&M

 

 Ah Pah Creek (1105.110702)

THP Number

County

Location

CalWater Watershed ID

1-04-065

Humboldt

T1N, R2E, Sec 2;  HB BL&M

 Stevens Creek (1111.220603)

1-04-240

Humboldt

T2N, R2E, Sec 28;  HB BL&M

Hely Creek (1111.210003)

1-06-023

Humboldt

T2N, R1E, Sec 3,9,10;  HB BL&M

Cooper Mill Creek (1111.230301)

1-06-037

Humboldt

T1S, R1E, Sec 3,9,10;  HB BL&M

Happy Valley (1112.200103)

Beer Bottle (1112.200101)

1-07-161

Humboldt

T1N, R1E, Sec.2,11,12,13,15,16; T1N, R2E, Sec 18; 

 Jordan Creek (1111.120202)

1-07-204

Humboldt

T1N, R2E, Sec.12; HB&M

 RootCreek (1111.220604)

1-08-001

Humboldt

T2N, R2W, Sec.13; HB&M

Salt River(1111.110303)

1-08-005

Humboldt

 T2N, R1E, Sec.6; HB&M

Strong's Creek(1111.110203)

1-08-011

Humboldt

T1S, R4E, Sec.24,25; T1S, R5E, Sec 9,16,17,21; HB&M

Thurman Creek(1111.130101)

Dairy Creek(1111.220401)

1-08-022

Humboldt

 T1N, R1E, Sec.8,15,17; HB&M

Jordan Creek (1111.120201)

Monument Creek (1111.120202)

1-08-027

Humboldt

T3N, R1E, Sec.29,30,31; T3N, R1W, Sec 36; HB&M

Strong's Creek(1111.110203)

1-08-029

Humboldt

T7N, R2E, Sec.33,34; T6N, R2E, Sec 3,4; HB&M

Denman Creek(1109.200001)

1-08-032

Humboldt

T5N, R2E, Sec.23; T5N, R3E, Sec 7; 

 Dry Creek (1109.300601)

1-08-041

Humboldt

 T4N, R1E, Sec.11,12,14; HB&M

Upper Freshwater (1110.000101)

Little Freshwater Creek (1110.000103)

1-08-047

Humboldt

 T1N, R1E, Sec.22,23,26,27; HB&M Jordan Creek (1111.120202)

1-08-048

Humboldt

 T4N, R1E, Sec.8,9,16,17; HB&M

Little Freshwater Creek (1110.000103)

1-08-050

Humboldt

 T2S, R3E, Sec4,5,8,9; HB&M

Thompson Creek (1111.410602)

Canoe Creek (1111.310102)

1-08-051

Humboldt

T1N, R2E, Sec.1; T2N, R2E, Sec 25,36; T2N, R3E, Sec 30,31;HB&M

Stevens Creek (1111.220603)

Grizzly Creek (1111.220602)

1-08-052

Humboldt

T12N, R1E, Sec.40; T12N, R2E, Sec 16,17,18,21; HB&M

 Apah Creek (1105.110702)

1-08-054

Humboldt

T8N, R1E, Sec.4; T9N, R1E, Sec33,34; HB&M

 Pitcher Creek (1108.100001)

1-08-058

Humboldt

 T6N, R3E, Sec.16; HB&M Lupton Creek (1107.200102)

1-08-059

Humboldt

 T6N, R3E, Sec.28,33,39; HB&M Noisy Creek (1107.300201)

1-08-060

Humboldt

 T10N, R2E, Sec.1,2,10,11,15,16; HB&M Mettah Creek (1105.110305)

1-08-064

Humboldt

 T7N, R2E, Sec.4,5,6,8,9; HB&M

Lower South Fork(1108.200001)

Headwaters Little River (1108.200003)

1-08-065

Humboldt

 T1N, R3E, Sec.8,9; HB&M Swain's Flat (1111.220601)

1-08-068

Humboldt

 T4N, R1W, Sec.15 Lower Elk River (1110.000402)

1-08-070

Humboldt

 T6N, R3E, Sec.7,8,18; HB&M

Long Prairie Creek (1109.200002)

Lupton Creek (1107.200102)

Pollock Creek (1109.200003)

1-08-072

Humboldt

T4N, R1E, Sec.30; T4N, R1W, Sec 25; HB&M

 Lower North Fork Elk Creek (1110.000201)

1-08-076

Humboldt

T6N, R3E, Sec.34,35; T5N, R3E, Sec 2,3; HB&M

 Noisy Creek (1107.300201)

1-08-083

Humboldt

 T9N, R1W, Sec.25,35,36; HB&M McDonald Creek (1108.100002)

1-08-084

Humboldt

 T3N, R1E, Sec.3,4; HB&M

Lower N Fork Elk Creek (1110.000201)

Upper S Fork Elk Creek (1110.000201)

1-08-105

Humboldt

 T1S, R1E, Sec.9,10; HB&M

Happy Valley (1112.200103)

THP Number

County

Location

CalWater Watershed ID

1-03-012

Mendocino

 T14N, R16W, Sec.29,32; HB&M

Mill Creek(1113.500708)

Lower Indian Creek  (1113.500402)

1-04-291

Mendocino

T14N, R15W, Sec.18,19; T14N, R16W, Sec. 13,24; MD BL&M

Upper Greenwood Creek (1113.610003)

1-05-227

Mendocino

T14N, R15W, Sec.17,18,19,20; MD BL&M

Upper Greenwood Creek (1113.610003)

1-07-075

Mendocino

T19N, R16W, Sec.22,23,24,25,26; MD BL&M

Churchman Creek(1113.130302)

Upper South Fork Ten Mile River (1113.130304)

1-07-180

Mendocino

T11N, R14W, Sec.1,2,3,4,10,15,16,21,22; T12N, R14W, Sec. 28,33,35,36; MD BL&M

Red Rock Creek (1113.820002)

1-08-002

Mendocino

T16N, R16W, Sec.4; T17N, R16W, Sec.33 MD BL&M

 Albion River (1113.400001)
1-08-013

Mendocino

T18N, R15W, Sec.6, T18N, R16W,Sec.1, T19N, R15W, Sec.19,30,31, T19N, R16W, Sec.25.36; MD BL&M

Upper South Fork Ten Mile River(1113.130304)

Middle Fork North Fork Noyo River(1113.200104)

1-08-017

Mendocino

T17N, R14W, Sec.28,32,33; MD BL&M

Rice Creek (1113.300203)

1-08-033

Mendocino

T20N, R16W, Sec.28,32,33,34; MD BL&M

Lower Middle Fork Ten Mile River(1113.130202)

1-08-037

Mendocino

T18N, R16W, Sec.34; T17N, R16W, Sec.1,2,3,12; MD BL&M

Two Log Creek (1113.300406)

Parlin Creek (1113.200302)

Chamberlain Creek (1113.200302)

1-08-039

Mendocino

T12N, R16W, Sec.1,2,11,14;  T12N, R15W, Sec.31,32;  T13N, R15W, Sec.31,32; MD BL&M

North Fork Garcia River (1113.700205)

Rolling Brook(1113.700204)

1-08-067

Mendocino

T20N, R16W, Sec.19,20,21,22,27,28; MD BL&M

Bear Haven Creek (1113.130203)

Lower Middle Fork Ten Mile River(1113.130202)

1-08-074

Mendocino

T18N, R16W, Sec.25,25,36; MD BL&M

Brandon Gulch(1113.200301)

1-08-081

Mendocino

T17N, R16W, Sec.3,4,9,10; MD BL&M

Berry Gulch(1113.300402)

1-08-088

Mendocino

T19N, R15W, Sec.16,17,18,19,20,21,29,30; MD BL&M

Middle Fork North Fork Noyo River(1113.200104)

THP Number

County

Location

CalWater Watershed ID

1-08-057

Napa

T8N, R6W, Sec.7; MD BL&M

Simmons Canyon(2206.500102)

Richie Creek (2206.500203)

THP Number

County

Location

CalWater Watershed ID

2-07-092

Nevada

T17N, R9E, Sec.1; T17N, R10E, Sec.7 MD BL&M

Humbug Creek (5517.320304)

Little Bear Creek (5517.320201)

2-08-020

Nevada

T16N, R10E, Sec 3,5,6,10,17; MD BL&M

Buckeye Ridge(5516.340304)

Burlington Ridge(5517.200104)

Scott Flat Reservoir(5517.200101)

THP Number

County

Location

CalWater Watershed ID

1-08-044

San Mateo

T8S, R4W, Sec 9; MD BL&M

Butano Creek(2202.400302)

THP Number

County

Location

CalWater Watershed ID

1-08-016

Santa Cruz

T10S, R2E, Sec 29 and parts of unapportioned Salsipuedes Rancho; MD BL&M

Browns Creek (3304.100101)

1-08-018

Santa Cruz

T9S, R2W, Sec 4; MD BL&M

Bear Creek (3304.120300)

1-08-038

Santa Cruz

T8S, R3W, Sec 35; MD BL&M

Castlerock Falls  (3304.120102)

1-08-062

Santa Cruz

T10S, R1E, Sec 26; MD BL&M

Corralito's Creek (3305.100102)

1-08-073

Santa Cruz

T9S, R2W, Sec 7,8,9,17,18; MD BL&M

King's Creek (3304.120101)

1-08-079

Santa Cruz

T9S, R3W, Sec 16,17; MD BL&M

 Scott Creek (3304.110204)

THP Number

County

Location

CalWater Watershed ID

1-08-006

Sonoma

T7N, R10W, Sec 1; MD BL&M

Green Valley Creek (1114.110103)

Pocket Canyon (1114.110301)

1-08-021

Sonoma

T10N, R14W, Sec 4,5,9,10; MD BL&M

Little Creek(1113.830004)

1-08-078

Sonoma

T10N, R14W, Sec 11; MD BL&M

Little Creek(1113.830004)

THP Number

County

Location

CalWater Watershed ID

1-07-178

Trinity

T4S, R7E, Sec 22; BL&M

Lower Salt Creek(1111.500502)

1-08-020

Trinity

T3S, R6E, Sec 16,21; BL&M

MuddCreek(1111.410101)

Upper South Dobbyn Creek (1111.410103)

2-07-160

Trinity

T33N, R10W, Sec 10,15,16,17,21,22;MD BL&M

Oregon Gulch(1106.150601)

West Weaver Gulch(1106.320001)

Dutton Creek(1106.320003)

2-08-015

Trinity

T35N, R8W, Sec 17,21; MD BL&M

Strope Creek (1106.400807)

THP Number

County

Location

CalWater Watershed ID

2-07-161

Yuba

T18N, R06E, Sec 1,11,12; MD BL&M

Daken Flat (5517.130101)

 

Post Fire Erosion and Slope Stability

California Geological Survey staff provide advisory services to the Department of Forestry and Fire Protection regarding geologic and slope stability concerns associated with wildfires and vegetation management plans in mountainous areas of California. The results of some of this work are presented below.

Document

Description

Article

  California Fires, Floods, and Landslide, 2005

PowerPoint

  California Debris Flows & The Effects of Fire, 2005

California Geology Article

  Fire and Rain Equal Mudflows, Big Sur 1972

California Geology Article

  Hazard Evaluation Following the Tunnel (Oakland Hills) Fire, Oct 19-23, 1991

Burn Site Form

  California Geological Survey Burn Site Evaluation Form

 
Other Documents Prepared by CGS/FWGP

Document

Description

Memoranda

Review of July 2002 EPA Analysis Impacts of Timberland Management on Water Quality. Dated November 27, 2002.

Memoranda

Regional Geologic Information and Preliminary Geomorphic Characterization of Bear Creek at Quigley Grove, Humboldt County, California. Dated February 24, 2003.

NRCS Report
Appendix 1
Appendix 2
 

Geologic Consequences of Tree Removal Under the National Resources Conservation Service (NRCS) Sponsored Southern California Tree Mortality Emergency Watershed Protection Program. Dated November 28, 2006.
Appendix 1 - Inventory Sheet
Appendix 2 - Photos

 SP 120
 (PDF 635KB)
 SP 120 Errata
 (PDF 67 KB)


Special Publication 120

Index to Published Landslide Maps, California Coast Ranges, Monterey County and North for Use in Timber Harvesting Plan Preparation on Non-Federal Land, 1999.