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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

2-14-064 Butte T19N, R07E, Sec. 3, 9-11, 14, 15, 20, 28, 31; T20N, R07E, Sec. 34, 35; T18N, R07E, Sec. 5, 6, 8; T19N, R06E, Sec. 36; T19N, R08E, Sec. 23, 24; MD B&M Lewis Flat (5518.230001); Brandy Creek (5517.510103); Oroleve Creek (5518.220204); Indian Creek (5517.510203); New Bullards Bar Reservoir (5517.510101) Costa Creek (5517.130102); Keystone Creek (5517.130202); Little Oregon Creek (5517.510102); French Town (5517.130201)

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  Caleveras  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

 4-14-017 El Dorado  T09N, R13E, Sec. 25; T09N, R14E, Sec. 30; MDBL&M  Clear Creek (2202.300004) 
 4-14-012 El Dorado  T13N, R10E, Sec. 23; MDBL&M  Dardanelles Creek (5514.410102); Missouri Canyon (5514.410200) 

THP Number

County

Location

CalWater Watershed ID

4-14-021 Fresno T09S, R25E, Sec. 15, 20-22, 27-29, 32, 33; MDBL&M Shaver Lake (6540.300300) 

THP Number

County

Location

CalWater Watershed ID

 1-14-106  Humboldt  T08N, R01W, Sec. 1; T08N, R01E, Sec. 3, 4, 6, 9, 10; T09N, R01W, Sec. 36; T09N, R01E, Sec. 31; HB&M  Maple Creek (1108.100003) 
1-14-107  Humboldt  T08N, R02E, Sec. 26, 27, 34, 35; HB&M  Little River (1108.200003); Panther Creek (1107.200403); (1107.200301) 
1-14-103   Humboldt T05S, R02E, Sec. 36; T05S, R02E, Sec. 1, 2, 11, 12; Upper Sproul Creek (1111.320703) 
 1-14-119 Humboldt  T03N, R01E, Sec. 6, 7; HB&M  McWhinney Creek (1110.000302) 
 1-12-046 Humboldt  T06N, R03E, Sec. 7, 18; HB&M  Long Prairie Creek (1109.200002); Pollock Creek (1109.200003) 
 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) 

THP Number

County

Location

CalWater Watershed ID

1-14-089  Mendocino  T16N, R15W, Sec. 25, 26, 34-36; MDB&M  Little North Fork Navarro River (1113.500603) 
 1-14-102 Mendocino  T20N, R16W, Sec. 28-33; MDBL&M  Lower Middle Fork Ten Mile River (1113.130202); Bear Haven Creek (1113.130203) 
 1-14-081  Mendocino T17N, R14W, Sec. 17, 20, 28, 32, 33; MDBL&M  Rice Creek (1113.300203) 
1-13-009 Mendocino  T18N, R16W, Sec. 1; T19N, R15W, Sec. 18, 19, 30, 31; T19N, R16W, Sec. 25, 35, 36; MDBL&M  Duffy Gulch (1113.200202); Upper South Fork Ten Mile River (1113.130304) 
 1-10-123 Mendocino   T15N, R15W, Sec. 7-10, 15-18; MDBL&M  Lower South Branch Navarro (1113.500502)
 1-14-115 Mendocino  T15N, R16W, Sec. 4, 5, 8; T16N, R16W, Sec. 33; MDBL&M  Ray Gulch (1113.500706); Big Salmon Creek (1113.400005)
 1-11-025 Mendocino   T14N, R16W, Sec. 8, 9; MDBL&M  Lower Elk Creek (1113.620001)
1-14-111   Mendocino T12N, R15W, Sec. 21, 22, 27-29; MDBL&M   North of Gualala Mt. (1113.700202)
 1-10-063 Mendocino   T14N, R16W, Sec. 5-7; MDBL&M Lower Elk Creek (1113.620001) 
 1-08-160 Mendocino  T13N, R16W, Sec.  25, 26, 35, 36; MDBL&M  Upper Elk Creek (1113.620002)
 1-08-181 Mendocino  T14N, R15W, Sec. 30, 31; T13N, R15W, Sec. 6; MDBL&M  Upper Elk Creek (1113.620002) 
 1-14-122 Mendocino  T18N, R16W, Sec. 29-32; MDBL&M  Parlin Creek (1113.200302) 
 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) 

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) 

THP Number

County

Location

CalWater Watershed ID

 2-14-083  Plumas T25N and T26N, R10E, Sec. 3, 4, 29, 32-34; MD B&M  Hough Creek (5518.530403); Taylorsville (5518.530401) 

THP Number

County

Location

CalWater Watershed ID

 2-14-072  Shasta T35N, R04W, Sec. 11, 13-15; MD B&M  Upper Salt Creek (5506.200206); Hirz Creek (5506.200504) 
 2-14-057  Shasta T38N, R04W, Sec. 15, 21, 22; MDB&M  Lower Soda Creek (5525.210202); Sweetbrier Creek (5525.100106); Lower Castle Creek (5525.210302) 
 2-14-060 Shasta  T38N, R01E, Sec. 21-23, 26-28; MDB&M   Devil's Canyon (5526.160001); Curtis (5526.160003)
2-14-078 Shasta  T38N, R01E, Sec. 16, 17, 20, 21; MD B&M  Devils Canyon (5526.160001) 
2-14-076  Shasta  T37N, R01E, Sec. 4, 5, 8, 17, 19, 20, 29; MD B&M  Devils Canyon (5526.160001); Stump Creek (5526.160002); Indian Creek (5526.150102) 

THP Number

County

Location

CalWater Watershed ID

2-14-080  Sierra  T20N, R09E, Sec. 25, 26; MD BL&M   Fiddle Creek (5517.530302); Goodyears Creek (5517.530202)

THP Number

County

Location

CalWater Watershed ID

2-14-047 Siskiyou T39N, R01E, Sec. 7, 18, 19, 29, 31; MD BL&M Raccoon Creek (5505.240302); Tate Creek (5505.240704)
 2-14-090  Siskiyou T39N, R04W, Sec. 21, 26-28, 34, 35; MD B&M  Lower Soda Creek (5525.210202); Little Castle Creek (5525.210103); Upper Soda Springs (5525.210102) 
 2-14-089 Siskiyou  T47N, R09W, Sec. 7, 17, 021; MD B&M  Jaynes Canyon (1105.350305); Lower Beaver Creek (1105.350405); Doggett Creek (1105.350504)
 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)

THP Number

County

Location

CalWater Watershed ID

 2-14-092 Tehama  T28N, R04E, Sec. 32-35; T27N, R04E, Sec. 3-5, 8, 9; MD B&M  Round Valley (5509.200201) 

THP Number

County

Location

CalWater Watershed ID

 2-14-073 Trinity  T37N, R38N, R05W, R06W, Sec. 1, 25, 31, 35; MD B&M  Baker Creek (1106.400302); Crow Creek (1106.400303) 
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) 

THP Number

County

Location

CalWater Watershed ID

2-14-064 Yuba  T19N, R07E, Sec. 3, 9-11, 14, 15, 20, 28, 31; T20N, R07E, Sec. 34, 35; T18N, R07E, Sec. 5, 6, 8; T19N, R06E, Sec. 36; T19N, R08E, Sec. 23, 24; MD B&M Lewis Flat (5518.230001); Brandy Creek (5517.510103); Oroleve Creek (5518.220204); Indian Creek (5517.510203); New Bullards Bar Reservoir (5517.510101) Costa Creek (5517.130102); Keystone Creek (5517.130202); Little Oregon Creek (5517.510102); French Town (5517.130201)

 

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.