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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

4-14-011 Calaveras T05N, R15E, Sec. 1-3, 9-11, 15-17, 20, 21; T06N, R15E, Sec. 36; T06N, R16E, Sec. 31; MD BL&M Upper San Antonio Creek (2204.300101)

THP Number

County

Location

CalWater Watershed ID

1-14-070 Del Norte T19N, R04E, Sec. 34; T18N, R04E, Sec. 2-4, 11, 12; HB&M Elk Creek (1102.200302); West Fork Illinois River (1102.200301)

THP Number

County

Location

CalWater Watershed ID

4-14-002 El Dorado T13N, R10E, Sec. 26, 35; MDBL&M Canyon Creek (1109.200005)
 4-14-014 El Dorado  T12N, T12E, Sec. 2, 11-14; T12N, R13E, Sec. 2, 3, 7-11, 16-19; MD BL&M Little Grizzly Canyon (1109.300201); Onion Creek (5514.330202); Upper Pilot Creek (5514.430301) 

THP Number

County

Location

CalWater Watershed ID

1-14-055 Humboldt T02N, R02E, Sec. 5, 6; T03N, R02E, Sec. 29-33; HB&M Corner Creek (1111.230204)
1-14-008 Humboldt T01S, R03E, Sec. 33, 34; Thompson Creek (1111.410602)
1-14-069 Humboldt T05N, R01E, Sec. 16; HB&M (1110.000503); (1110.000105)
1-14-073 Humboldt T09N, R01E, Sec. 5, 7, 8, 13, 14, 17-19; Upper Roach Creek (1105.110306); Mid Roach Creek (1105.110301); Upper Tully Creek (1105.110205); Lower Tully Creek (1105.110201)
1-13-041 Humboldt T02N, R02W, Sec. 14; HB&M Salt River (1111.110303)
1-14-068 Humboldt T04N, R04E , Sec. 20-22, 27-29; HB&M Boulder Creek (1107.300503); Twin Lakes Creek (1107.300103)
1-14-083 Humboldt T01N, R03E, Sec. 25, 27, 34-36; HB&M Chalk Rock (1111.220605); Burr Creek (1111.130201)
1-14-084 Humboldt T01N, R02W, Sec. 2, 4, 5; T02N, R02W, 32, 33; HB&M Guthrie Creek (1112.100002); Flyblow Gulch (1112.100001); Price Creek (1111.110102)
1-14-087 Humboldt T04N, R04E, Sec. 5, 6, 8, 9; Bradford Creek (1107.300101); Twin Lakes Creek (1107.300103)
1-14-086 Humboldt T07N, R02E, Sec. 14, 15, 22, 23, 26; HB&M Canyon Creek (1109.200005)
1-14-090 Humboldt T02N, R01E, Sec. 6; HB&M Strongs Creek (1111.110203)
1-14-093 Humboldt T10N, R01E, Sec. 33; T09N, R01E, Sec. 4, 8, 9, 16; McDonald Creek (1108.100002)
1-14-088 Humboldt T09N, R01E, Sec. 15, 16, 22, 23, 26, 36; HB&M Pitcher Creek (1108.100001)
1-14-075 Humboldt T05N, R04E, Sec. 35; T04N, R04E, Sec. 1, 2; HB&M (1106.210201); (1106.210202); (1107.300101)
1-14-095   Humboldt T11N, R03E, Sec. 22, 23, 25-27, 35, 36; T11N, R04E, Sec. 31; HB&M  Cappell (1105.110304); Mewah (1105.110204); East Fork Pecwan Creek (1105.110403) 

THP Number

County

Location

CalWater Watershed ID

2-14-041

Lassen T31N, R10E, Sec. 5-8, 18; T32N, R10E, Sec. 32; MD B&M Fox Mtn. (8637.310601); Martin Creek (8637.310301); Wildcat Point (8637.310604)
2-14-049 Lassen T28N, R10E, Sec. 9, 15, 16, 19-22, 27, 28; MD B&M Mountain Meadows Creek (5518.450300)

THP Number

County

Location

CalWater Watershed ID

1-14-044 Mendocino T21N, R17W, Sec. 3-6; MDBL&M Juan Creek (1113.120103)
1-14-067 Mendocino T18N, R17W, Sec. 22; MDBLM Mouth of Noyo River (1113.200403)
1-14-064 Mendocino T21N, R16W, Sec. 15, 22, 23, 26; MDBL&M Kenny Creek (1111.330302); Mud Creek (1111.330301)
1-14-071  Mendocino  T20N, R16W, Sec. 19, 20, 29, 30; MDBL&M  Bear Haven Creek (1113.130203) 
1-14-072 Mendocino T13N, R16W, Sec. 29; MDBL&M Lower Brush Creek (1113.640001)
1-14-078 Mendocino T15N, R17W, Sec. 3; MDBL&M Mouth of Navarro River (1113.500707)
1-14-077 Mendocino T15N, R14W, Sec. 18, 19; T15N, R15W, Sec. 13-16, 22-24; MDBL&M Lower South Branch Navarro River (1113.500502); Middle South Branch Navarro River (1113.500501)
1-14-009 Mendocino T18N, R15W, Sec. 16, 21; MDBL&M Olds Creek (1113.200102); North Fork Noyo River (1113.200105)
1-14-076 Mendocino T23N, R18W, Sec. 10, 11, 14, 15; MDBL&M Upper Usal Creek (1113.110102)
1-14-074 Mendocino T18N, R14W, Sec. 29-32; MDBL&M Upper North Fork Big River (1113.300305)
1-14-080 Mendocino T16N, R17W, Sec. 23-26; T16N, R16W, Sec. 19, 30; MDBL&M Lower Albion River (1113.400003)
1-14-094 Mendocino T16N, R17W, Sec. 27; MDBL&M Big Salmon Creek (1113.400005)
 1-14-091 Mendocino  T21N, R17W, Sec. 21, 28; MDBL&M  Rider Gulch (1113.120202) 
1-14-097   Mendocino T23N, R18W, Sec. 14, 23-25; MDBL&M  Lower Usal Creek (1113.110101) 
1-14-089  Mendocino  T16N, R15W, Sec. 25, 26, 34-36; MDB&M  Little North Fork Navarro River (1113.500603) 

THP Number

County

Location

CalWater Watershed ID

1-13-126 Napa T08N, R06W, Sec. 6; T08N, R07W, Sec. 1; MDB&M Simmons Canyon (2206.500102)

THP Number

County

Location

CalWater Watershed ID

2-13-102 Nevada T18N, R11E, Sec. 15, 16; MD B&M Poorman Creek (5517.320102)
2-14-042 Nevada T17N, R10E, Sec. 27, 32; MD BL&M Burlington Ridge (5517.200104)

THP Number

County

Location

CalWater Watershed ID

2-14-012 Plumas T20N, R07E, Sec. 2-4, 9, 10, 15, 16, 21; T21N, R07E, Sec. 9, 10, 13-16, 22-27, 34-36; T21N, R08E, Sec. 18, 19, 30, 31; MDBL&M Middle Fall River (5518.320601); Rock Creek (5518.220101); Upper Sucker Run (5518.220202); Upper Fall River (5518.320603)

THP Number

County

Location

CalWater Watershed ID

2-14-044 Shasta T36N, R01E, Sec. 6; T37N, R01W, Sec. 36; MD B&M Deep Creek (5526.150202)
2-14-055 Shasta T37N, R04W, Sec. 1, 11-15, 23, 24; MD BL&M Lower South Fork Sacramento River (5525.100104)
2-14-047 Shasta T39N, R01E, Sec. 7, 18, 19, 29, 31; MD BL&M Raccoon Creek (5505.240302); Tate Creek (5505.240704)
2-14-054 Shasta T33N, R03E, Sec. 31; T32N, R02E, Sec. 1; T32N. R03E, Sec. 6; MD B&M Huckleberry (5507.320102); Beal (5507.310103)
2-14-002 Shasta T31N, R01W, Sec. 25, 30, 36; MD B&M Shingle Creek (5507.220101); Lower South Fork Bear Creek (5507.220102)

THP Number

County

Location

CalWater Watershed ID

2-14-045 Sierra  T20N, R14E, Sec. 21, 27; MD BL&M Franklin Cabin (5518.350501) 

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)

THP Number

County

Location

CalWater Watershed ID

2-14-046 Tehama T24N, R09W, Sec. 25, 36; T24N, R08W, Sec. 30; MD B&M Auger Creek (5523.100203); Lower Willow Creek (5523.100301)

THP Number

County

Location

CalWater Watershed ID

2-14-040 Trinity T31N, R10W, Sec. 3, 4, 8-10, 15-17, 20-23, 29; MD B&M North Fork Hayfork Creek (1106. 250202); Johnson Gulch (1106.310101); Duncan Creek (1106.250403)

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 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.

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.