Menu
Contact Us Search
Organization Title


Adobe Reader®
is required to view most of the documents on this page. getacro.gif (712 bytes) To download the documents, right click on the link and select "Save Target As...".


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

4-14-023 Calaveras  T05N, R15E, Sec. 10, 11, 14-16, 20, 21; MD BL&M Upper San Antonio Creek (2204.300101)
4-14-026  Calaveras  T05N, R15E, Sec. 33, 34; T04N, R15E, Sec. 4-6, 8, 9, 18; MD BL&M  Douds Landing (6534.500601); Moran Creek (6534.500602) 

THP Number

County

Location

CalWater Watershed ID

1-14-155 Del Norte  T18N, R01W, Sec. 10, 11, 14, 15; HB&M Dominie Creek (1103.110004); Gilbert Creek (1101.000002); South Fork Winchuk River (1101.000001)
 1-14-142 Del Norte  T08N, R01E, Sec. 19, 20, 28-30; HB&M  Lower Rowdy Creek (1103.120001); Savoy Creek (1103.120002) 

THP Number

County

Location

CalWater Watershed ID

 4-14-012 El Dorado  T13N, R10E, Sec. 23; MDBL&M  Dardanelles Creek (5514.410102); Missouri Canyon (5514.410200) 
 4-14-024  El Dorado T12N, R10E, Sec. 3; MDBL&M  Canyon Creek (1109.200005) 

THP Number

County

Location

CalWater Watershed ID

 1-14-133 Humboldt   T07N, R02E, Sec. 2, 3, 11, 13, 14, 19; HB&M Headwaters Little River (1108.200003); Roaring Gulch (1107.200301) 
 1-14-128 Humboldt  T02S, R01W, Sec. 36; HB&M  Dean Creek (1111.110103) 
 1-14-011 Humboldt  T01N, R05E, Sec. 9, 16; HB&M  Thompson Creek (1111.220402); Sulphur Creek (1111.220301) 
 1-14-137 Humboldt  T03N, R01W, Sec. 14, 15, 23, 24, 26; HB&M  Middle Salmon Creek (1110.000604); Palmer Creek (1111.110202) 
1-14-131   Humboldt T06N, R03E, Sec. 15, 22, 26, 27; HB&M   Windy Creek (1107.300202)
1-14-138   Humboldt  T08N, R02E, Sec. 14, 15, 23; HB&M Panther Creek(1107.200403); Coyote Creek (1107.200401) 
 1-14-136 Humboldt  T09N, R02E, Sec. 2, 3; T09N, R03E, Sec. 4, 10, 11; T10N, R03E, Sec. 33, 34;   Upper Roach Creek (1105.110306) 
 1-14-144 Humboldt  T09N, R01E, Sec. 5, 8, 9, 17; T10N, R01E, Sec. 33; HB&M   McDonald Creek (1108.100002); Pitcher Creek (1108.100001)
 1-14-158 Humboldt  T04N, R01E, Sec. 12, 13; T04N, R02E; Sec. 7, 17, 18;   Upper Freshwater Creek (1110.000101) 
1-14-112  Humboldt  T09N, R03E, Sec. 27-29, 33, 34; T08N, R03E, Sec. 2-4, 9-11, 14-16; HB&M  Lower Little Pine Creek (1105.110103); Upper Little Pine Creek (1105.110101) 
1-15-001 Humboldt  T04N, R01W, Sec. 1, 2, 12; T04N, R01E, Sec. 5-8; HB&M  McWhinney Creek (1110.000104) 
 1-14-123 Humboldt  T05N, R01E, Sec. 24; HB&M  Upper Jacoby Creek (1110.000504) 

THP Number

County

Location

CalWater Watershed ID

1-15-004 Lake T12N, R08W, Sec. 24; MDBL&M Big Canyon Creek (5512.300105); Seigler Canyon Creek (5513.510200) 

THP Number

County

Location

CalWater Watershed ID

 1-14-120  Mendocino T17N, R17W, Sec. 9, 16; MDBL&M  Caspar Creek (1113.300404) 
 1-14-114 Mendocino  T16N, R16W, Sec. 4, 8-11, 14-17, 23, 26; MDBL&M  Middle Albion River (1113.400001); South Fork Albion River (1113.400002) 
1-14-105  Mendocino  T05S, R03E, Sec. 27, 28, 33, 34; T24N, R18W, Sec. 1, 2, 11, 12; MDBL&M   Standley Creek (1111.320501); Lower Indian Creek (1111.320504); Piercy Creek (1111.320502)
 1-13-118  Mendocino T23N, R17W, Sec. 3; MDBL&M   Mill Creek (1111.320401); Lower Hollow Tree Creek (1111.320302)
 1-14-127 Mendocino  T15N, R15W, Sec. 1, 2, 11, 12; MDBL&M  Middle South Branch Navarro River (1113.500501) 
 1-14-140  Mendocino T18N, R17W, Sec. 25-27, 36; T18N, R16W, Sec. 31; MDB&M  Hare Creek (1113.200401) 
 1-14-130  Mendocino  T18N, R17W, Sec. 25-27, 36; T18N, R16W, Sec. 31; MDB&M Hare Creek (1113.200401) 
 1-14-126 Mendocino   T19N, R16W, Sec. 7, 8, 17-19; T19N, R17W, Sec. 12-14, 24; MDBL&M  Campbell Creek (1113.130303); Churchman Creek (1113.130302)
 1-14-141  Mendocino  T18N, R17W, Sec. 13; T18N, R16W, Sec. 18, 19, 30; MDBL&M Brandon Gulch (1113.200301); Kass Creek (1113.200303) 
1-14-154  Mendocino  T20N, R16W, Sec. 27, 34-36; T19N, R16W, Sec. 1-3; MDBL&M  Lower Middle Fork Ten Mile River (1113.130202); Booth Gulch (1113.130201) 
 1-14-140  Mendocino T23N, R18W, Sec. 1, 2; T24N, R18W, Sec. 35, 36; MDBL&M  Upper Usal Creek (1113.110102) 
 1-14-145 Mendocino  T19N, R15W, Sec. 7, 8, 17, 18; T19N, R16W, Sec. 13; MDBL&M  Redwood Creek (1113.130301); Upper So. Fork Ten Mile River (1113.130304) 
 1-14-010  Mendocino  T15N, R16W, Sec. 27, 28; MDBL&M Middle Navarro River (1113.500602); Lower Greenwood Creek (1113.610001) 
 1-14-135 Mendocino  T18N, R14W, Sec. 6, 7; T18N, R15W, Sec. 1, 12, 13; MDBL&M  McMullen Creek (1113.200106); Olds Creek (1113.200102) 
 1-13-118 Mendocino  T23N, R17W, Sec. 3; MDBL&M  Mill Creek (1111.320401); Lower Hollow Tree Creek (1111.320302) 
 1-14-148 Mendocino  T16N, R15W, Sec. 11, 13, 14, 23, 24; MDBL&M  Mettick Creek (1113.300103); Little North Fork Navarro River (1113.500603)
1-14-012  Mendocino  T19N, R14W, Sec. 29-31; T19N, R15W, Sec. 25, 36; MDBL&M Redwood Creek (1113.200101) 
 1-14-157  Mendocino T20N, R16W, Sec. 8, 9; MDBL&M  Bald Hill Creek (1113.130402) 
 1-14-147 Mendocino  T23N, R17W, Sec. 8, 17-20; MDBL&M  Lower Hollow Tree Creek (1111.320302); Lower Usal Creek (1113.110101) 
1-14-101  Mendocino T17N, R16W, Sec. 8, 9, 16, 17; MDBL&M  Berry Gulch (1113.300402) 
1-14-125   Mendocino T14N, R16W, Sec. 5-9, 16-18; MDBL&M  Lower Elk Creek (1113.620001) 
1-15-010 Mendocino  T14N, R16W, Sec. 1; MDBL&M  Upper Greenwood Creek (1113.610003); Middle Navarro River (1113.500703) 
1-14-134  Mendocino T22N, R18W, Sec. 13, 14, 23-26; MDBL&M  Cottaneva Creek (1113.120101) 

THP Number

County

Location

CalWater Watershed ID

1-13-126 Napa T8N, R6W, Sec. 6; T8N, R7W, Sec. 1; MD B&M Simmons Canyon (2206.500102)

THP Number

County

Location

CalWater Watershed ID

2-13-031 Nevada T16N, R09E, Sec. 1, 2, 11, 12; T16N, R10E, Sec. 6; T17N, R09E, Sec. 36; T17N, R10E, Sec. 31; MD B&M Scotts Flat Reservoir (5517.200101); Little Deer Creek (5517.200102) 
 2-14-004 Nevada  T16N, R09E, Sec. 13; MD BL&M  Buckeye Ridge (5516.340304) 

THP Number

County

Location

CalWater Watershed ID

2-11-032 Plumas T23N, R12E, Sec. 32, 33; MD BL&M Smith Creek (5518.330401); Jackson Creek (5518.330504) 

THP Number

County

Location

CalWater Watershed ID

1-14-117 Santa Cruz T10S, R03W, Sec. 3, 9, 10, 15, 16, 22; MDBL&M  San Vicente Creek (3304.110203) 
1-97-020  Santa Cruz  T10S, R01W, Sec. 14, 15; MDBL&M West Branch Soquel (3304.130105) 

THP Number

County

Location

CalWater Watershed ID

 2-14-101 Shasta   T36N, R01E, Sec. 20, 29-32; T36N, R01W, Sec. 36; MD B&M Roaring Creek (5526.140203); Little Roaring Creek (5526.140202) 
 2-14-112 Shasta  T32N, R02E, Sec. 26-28, 33-35; MD BL&M  Upper South Fork Bear Creek (5507.220104); Beal (5507.310103) 
2-15-003 Shasta  T30N, R10W, Sec. 22, 26-28, 34-36; MD BL&M   Chanchelulla Creek (1106.310105); Harrison Gulch (5524.360301); Knob Gulch (5524.360402)

THP Number

County

Location

CalWater Watershed ID

 2-14-111 Sierra   T20N, R08E, Sec. 11-14, 23-26; T20N, R09E, Sec. 5, 8, 9, 16, 17, 19, 20; MD B&M  Gold Run (5517.520202); Cherokee Creek (5517.530404); Brushy Creek (5517.520201); Union Hill (5517.530403)

THP Number

County

Location

CalWater Watershed ID

 2-14-097 Siskiyou  T39N, R03W, Sec. 1, 2, 11-15, 22, 27; MD B&M   Lower Panther Creek (5505.220201); Upper Soda Creek (5525.210203); Middle Soda Creek (5525.210201); Pig Creek (5505.220104)
 2-14-099  Siskiyou T48N, R08W, Sec. 19; MD B&M   Deer Creek (1105.350301); Soda Creek (1105.350302)

THP Number

County

Location

CalWater Watershed ID

 2-14-109 Tehama  T24N, R09W, Sec. 4-6; T24N, R10W, Sec. 1; T25N, R09W, 28, 29, 31-33; T25N, R10W, Sec. 36; MD B&M  Elk Lake (5523.100103); McClure Creek (5523.100102) 
2-14-102  Tehama  T27N, R02E, Sec. 1-3; T28N, R01E, Sec. 1; 28N, R02E, Sec. 6-8, 14-17, 21, 23, 25, 26, 34-36; T28N, R03E, Sec. 31; T29N, R02E, Sec. 31, 32; MD B&M  Plum Creek (5509.640001); Chapman Gulch (5509.640002); Judd Creek (5509.630101); Deadhorse Creek (5509.630103); Refuge (5509.630201); Panther Spring (5509.630202); McCarty Creek (5509.630203) 

THP Number

County

Location

CalWater Watershed ID

2-14-094   Trinity T34N &T35N, R07W, Sec. 5, 17, 21, 23, 27, 29, 33; MD B&M  Feeny Gulch (1106.400805); Clawton Gulch (1106.400804) 
2-15-003  Trinity  T30N, R10W, Sec. 22, 26-28, 34-36; MD BL&M   Chanchelulla Creek (1106.310105); Harrison Gulch (5524.360301); Knob Gulch (5524.360402) 

THP Number

County

Location

CalWater Watershed ID

2-14-111 Yuba  T20N, R08E, Sec. 11-14, 23-26; T20N, R09E, Sec. 5, 8, 9, 16, 17, 19, 20; MD B&M Gold Run (5517.520202); Cherokee Creek (5517.530404); Brushy Creek (5517.520201); Union Hill (5517.530403)

 

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

SR 217

Special Report 217
Geologic Compilation of Quaternary Surficial Deposits in Southern California. Contains report and a complete GIS digital database for all 16 maps.

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 635 KB)
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.

Vegetation Island Review, Oceano Dunes SVRA

Geologic review of shape, size, and geomorphology of 20 vegetation islands in Oceano Dunes SVRA. Describes geologic conditions and sand sample analyses, dune processes, sediment transport, sedimentation and moisture retention, historical changes over more than 60 years, and suggested management practices.

SLOAPCD Phase 2 Study

At the request of California State Parks, CGS prepared this evaluation of the San Luis Obispo County Air Pollution Control District’s “South County Phase 2 Particulate Study” dated February 2010.