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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

4-15-001 Calaveras  T07N, R15E, Sec. 30, 31; MDBL&M Lower Forest Creek (6532.600702); Upper Forest Creek (6532.600703)

THP Number

County

Location

CalWater Watershed ID

1-15-038 Del Norte  T15N, R01E, Sec. 28, 32, 33; HB&M (1103.500001)
1-15-045  Del Norte  T14N, R01E, Sec. 2, 3, 10, 11, 15; HB&M  Upper West Fork Hunter Creek (1105.110802); Lower West Fork Hunter Creek (1105.110803) 
 1-15-048  Del Norte T18N, R01W, Sec. 11, 12; T18N, R01E, Sec. 7, 18; HB&M  Lower Rowdy Creek (1103.120001); S. Fork Winchuck River (1101.000001); Dominie Creek (1103.110004) 

THP Number

County

Location

CalWater Watershed ID

1-15-008  Humboldt T01N, R03E, Sec.  17, 19-22, 27-29; HB&M Swains Flat (1111.220601); Root Creek (1111.220604); Lower Larabee Creek (1111.130300) 
 1-15-002  Humboldt T05N, R01E, Sec. 21; HB&M  Fay Slough (1110.000105) 
 1-15-018 Humboldt   T05N, R02E, Sec. 3; T06N, R02E, Sec. 21, 27, 28, 33, 34; HB&M  Hatchery Creek (1109.200004); Powers Creek (1109.100104)
 1-14-049 Humboldt  T01S, R01E, Sec. 10, 11, 14, 15; HB&M  Lower Larabee Creek (1111.130300) 
 1-14-001  Humboldt T01N, R02E, Sec. 8, 9, 14-17, 22, 23; HB&M  Root Creek (1111.220604) 
 1-15-021 Humboldt  T03N, R01W, Sec. 27;  Palmer Creek (1111.110202) 
 1-15-026 Humboldt   T05N, R01E, Sec. 10, 14, 15; HB&M (1110.000503) 
 1-15-035 Humboldt  T02S, R01E, Sec. 26  Dry Creek (1112.300304) 
 1-15-027 Humboldt  T01N, R02E, Sec. 1, 5-7  Grizzly Creek (1111.220602); Stevens Creek (1111.220603) 
 1-15-032  Humboldt T10N, R04E, Sec. 17; HB&M  Miner's Creek (1105.110203) 
 1-15-030 Humboldt   T01N, R03W, Sec. 34-36; T01N, R02W, Sec. 31; T01S, R03W, Sec. 1; T01S, R02W, Sec. 6; HB&M (1112.200203) 
 1-15-024 Humboldt  T04S, R04E, Sec. 1, 12, 13; T04S, R05E, Sec. 7; HB&M  Upper Jewett Creek (1111.420604); Steelhead Creek (1111.410303) 
 1-14-153 Humboldt   T01N, R01W, Sec. 16, 17; HB&M Howe Creek (1111.110101) 
 1-15-039 Humboldt  T12N, R02E, Sec. 8, 9, 16, 17; HB&M  Terup Creek (1105.110703); Ah Pah Creek (1105.110702) 
 1-15-043 Humboldt  T05N, R02E, Sec. 6; T06N, R02E, Sec. 31; T05N, R01E, Sec. 1; HB&M   (1109.100104) 
1-15-044  Humboldt  T05N, R02E, Sec. 2, 3, 10-13; T05N, R03E, Sec. 6, 8; HB&M  Upper Cannon Creek (1109.300603); Lower Cannon Creek (1109.300602); Dry Creek (1109.300601) 
 1-15-046 Humboldt  T03N, R01W, Sec. 2, 3, 10, 11; HB&M  Middle Salmon Creek (1110.000060) 
 1-15-025  Humboldt T01S, R02W, Sec. 22, 25-27; HB&M  Peaked Creek (1112.200102); South Fork Bear River (1112.200205); West Side Creek (1112.200201) 
 1-15-050  Humboldt T10N, R02E, Sec. 22, 23, 26, 27; HB&M  Metah Creek (1105.110305); Upper Roach Creek (1105.110306); Roach Creek (1105.110301) 
 1-15-037  Humboldt T01N, R03E, Sec. 35; T01S, R03E, Sec.  1-3, 11  Lower Larrabee Creek (1111.130300); Burr Creek (1111.130201)
1-15-054   Humboldt T05N, R01E, Sec.3   Lower Jacoby Creek (1110.005003)
 1-15-053  Humboldt  T08N, R01W, Sec. 1, 12; T08N, R01E, Sec.6, 7, 9, 10, 15-17, 22; HB&M Maple Creek (1108.100003) 

THP Number

County

Location

CalWater Watershed ID

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) 
 1-15-013 Mendocino   T16N, R15W, Sec. 5, 6; T17N, R15W, Sec. 31, 32; MDBL&M  Upper Albion River (1113.400006)
1-15-007  Mendocino  T17N, R14W, Sec. 5-7, 18; T17N, R15W, Sec. 13; MDBL&M  East Branch North Fork Big River (1113.300303) 
 1-15-015 Mendocino  T17N, R16W, Sec. 22, 23, 26, 27; MDBL&M  Two Log Creek (1113.300406) 
 1-15-016 Mendocino   T21N, R17W, Sec. 26, 27, 34-36; MDBL&M Rider Gulch (1113.120202) 
 1-15-019  Mendocino T20N, R17W, Sec. 8, 9, 16; MDBL&M  Chadbourne Gulch (1113.130602); Abalobadiah Creek (1113.130603) 
1-15-023 Mendocino   T13N, R16W, Sec. 21; MDBL&M Lower Brush Creek (1113.640001) 
 1-14-074 Mendocino  T18N, R14W, Sec. 29-32; MDBL&M  Upper North Fork Big River (1113.300305) 
 1-15-022 Mendocino   T19N, R16W, Sec. 10, 11, 14, 15, 23; MDBL&M Redwood Creek (1113.130301); Churchman Creek (1113.130302); Campbell Creek (1113.130303) 
 1-15-012 Mendocino  T16N, R13W, Sec. 31; T16N, R14W, Sec. 36; T15N, R13W, Sec. 6, 7; T15N, R14W, Sec. 1, 12  Upper Ackerman Creek (1114.310301) 
1-14-156  Mendocino T16N, R15W, Sec. 20, 28, 29; MDBL&M  John Smith Creek (1113.500601); Dutch Henry Creek (1113.500602); Albion River (1113.400006) 
 1-13-118 Mendocino   T23N, R17W, Sec. 3: MDBL&M Lower Hollow Tree Creek (1111.320302); Mill Creek (1111.320401) 
 1-15-031 Mendocino  T16N, R15W, Sec. 3, 4, 9, 10; MDBL&M   Mettick Creek (1113.300103); Upper Albion River (1113.400006)
 1-07-013 Mendocino   T12N, 12W, Sec. 22-24, 26, 27, 35, 36; MDBL&M Soda Creek (1114.240102) 
 1-15-029  Mendocino T17N, R15W, Sec. 12, 13, 24; T17N, R14W, Sec. 18; MDBL&M  East Branch North Fork Big River (1113.300303) 
 1-15-040  Mendocino  T12N, R13W, Sec. 3-5; MDBL&M Maple Creek (1113.500103); Middle Rancheria Creek (1113.500106); Pardaloe Creek (1113.700105) 
 1-15-036 Mendocino   T16N, R16W, Sec. 27-29, 33, 34; MDBL&M Big Salmon Creek (1113.400005) 

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

 2-15-012  Nevada T16N, R09E, Sec. 26; MDBL&M  Missouri Canyon (5516.340301) 
 2-15-011 Nevada   T16N, R11E, Sec. 8; MD B&M  Upper Boardman Canal (5516.340102)
2-15-007 Nevada  T15N, R09E, Sec. 2; T16N, R09E, Sec. 35; MD B&M  Missouri Canyon (5516.340301) 

THP Number

County

Location

CalWater Watershed ID

 2-14-103 Plumas  T23N and T24N, R12E, Sec. 3-9, 33; MD B&M  Happy Valley (5518.330501) 
 2-14-070 Plumas  T26N, R09E, Sec. 25; T26N, R10E, Sec. 30; MD B&M  Hough Creek (5518.530403) 
2-15-018 Plumas  T24N, R09E, Sec. 15, 16, 21, 22; T24N, R10E, Sec. 20, 29; MD B&M  Lower Knox Flat (5518.520204); East Clairmont (5518.520201); Thompson Creek 5518.520305) 

THP Number

County

Location

CalWater Watershed ID

 1-15-017 Santa Cruz  T22N, R18W, Sec. 31, 32; MDBL&M  Kings Creek (3304.120101) 
 1-15-028 Santa Cruz  T10S, R03W, Sec. 3, 4, 10; MDBL&M  Big Creek (3304.110201); Little Creek (3304.110202) 

THP Number

County

Location

CalWater Watershed ID

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)
 2-15-010  Shasta T38N and T39N, R02W, Sec. 1, 2, 11, 12, 35; MD B&M  Battle Creek (5505.230001) 
2-13-086 Shasta  T34N, R02E, Sec. 5, 7, 8; MD BL&M  Upper Hatchet Creek (5526.140102); Green Burney Creek (5526.330203); Terry Lake (5526.330201) 
 2-15-008  Shasta T32N, R02E, Sec. 12, 13; T32N, R03E, Sec. 7, 17, 18; MD BL&M  Upper Battle Creek (5507.120104); Beal (5507.310103) 
2-15-002 Shasta  T38N, R01E, Sec. 27, 28, 34; MD B&M  Devils Canyon (5526.160001); Curtis (5526.160003) 

THP Number

County

Location

CalWater Watershed ID

1-11-005 Sonoma T10N, R13W, Sec. 8, 16, 17; MDBL&M  Flat Ridge Creek (1113.840302)
 1-15-001 Sonoma  T07N, R10W, Sec. 32; MDBL&M  Fay Creek (1115.100002) 
 1-15-033  Sonoma T10N, R14W, Sec. 8, 16, 17, 21, 22; MDBL&M  Mouth of Gualala River (1113.850202) 

THP Number

County

Location

CalWater Watershed ID

 2-15-017 Siskiyou   T44N, R08W, Sec. 1, 5, 7, 8; MD BL&M McAdam Creek (1105.420802); Lower Indian Creek (1105.420803) 

THP Number

County

Location

CalWater Watershed ID

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) 
 2-15-015 Trinity   T31N, R10W, Sec. 8, 17, 18, 20, 29; MD BL&M Potato Creek (1106.250201); Duncan Creek (1106.250403); North Fork Hayfork Creek (1106.250202) 
2-15-025  Trinity   T39N, R06W and R07W, Sec. 19, 24, 25; MD B&M Ramshorn Creek (1106.400202); Sherer Creek (1106.400102) 
 2-15-022  Trinity T35N, R08W, Sec. 15, 23, 27; MD B&M  Strope Creek (1106.400807); Bear Gulch (1106.400806) 

THP Number

County

Location

CalWater Watershed ID

4-15-006 Tuolumne  T04N, R15E, Sec. 13; T04N, R16E, Sec. 1, 2, 7-12, 15-18; 04N, R17E, Sec. 7, 16, 17; MDB&M Dry Meadow Creek (1105.420604); Soap Creek (6534.410601)

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.