Forest and Watershed Geology Documents

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Timber Harvest Plan Geologic Reviews

CGS staff conduct engineering geologic field reviews of select Timber Harvesting Plans (THP) as part of a multi-agency review team led by the California Department of Forestry and Fire Protection (CAL FIRE). 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 CAL FIRE, 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@conservation.ca.gov and we will email a PDF if available (THPs beginning in 2002) or direct you to CAL FIRE for a hard copy. For more information on the THP review process, go to CAL FIRE's web page.

THP # County Location CalWater Watershed ID
2-14-106Butte and PlumasSec. 24, T24N/R4E;
Sec. 9-10, 14-17, 21-23, 27-28, 32-34, T24N/R5E;
MDB&M
North Valley Creek (5518.420301);
Swamp Creek (5518.420402);
Lockerman Creek (5518.420502);
Crane Valley (5518.600104);
Big Kimshaw Creek (5518.600204)
THP # County Location CalWater Watershed ID
1-18-081Del Norte

Sec. 23-26, 36, T14N/R1E;
Sec. 30, 31, T14N/R2E
HB&M

Lower Fork Hunter Creek (1105.170803)
Lower Turwar Creek (1105.110801)
1-18-104Del Norte

Sec. 14, T13N/R1E;
HB&M

McGarvey Creek (1105.110806);
1-18-106Del Norte

Portions of Sections 33, 34, 35, 36,
Sections 1, 2, 3, 4, 9, T18N/R1W
HB&M

South Fork Winchuck River (1101.000001)
Gilbert Creek (1101.000002)
1-18-114Del Norte

Portions of Sections 1, 2, T12N/R1E,
Sections 24, 26, 35, 36, T13N/R1E
HB&M

McGarvey Creek (1105.110806);
Tarup Creek (1105.110703)
THP # County Location CalWater Watershed ID
4-18-008El DoradoSec. 13, T08N/R13E;
Sec. 13, T12N/R10E;
MD B&M
Sopiago Creek (6532.240300)

4-18-009El DoradoSec. 25 and 36, T12N/R09E;
Sec. 31 and 32, T12N/R10E;
MD B&M

Greenwood Creek (5514.320401);
Kelsey Canyon (5514. 320501);

4-18-014El Dorado

Sec. 13, 15, 16, 19, 20, and 25-27;
T10N/R13E;
Sec. 20, 22, 23, and 27, T10N/R14E;
Sec. 19 and 29, T10N/R15E;
MD B&M

Headwaters Camp Creek (6532.230102);
Lower Sly Park Creek (6532.230501);
Middle Butt (6532.230402);
North Sly Park Creek (6532.230201);
Snow Creek (6532.230101);
Upper Alder Creek (5514.350303);
Van Horn Creek (6532.230302);

THP # County Location CalWater Watershed ID
1-18-073 HumboldtSec. 13, T2N/R1E;
Sec. 7, 16, 18, 21, T2N/R2E;
HB&M
Copper Mill Creek (1111.230301);
Cummings Creek (1111.230302);
Blanton Creek (1112.210001);
South Fork Yager Creek (1111.230303);
1-18NTMP-012 HumboldtPortions of Sections 21, T3S/R3E;
HB&M
Canoe Creek (1111.310102);
South Fork Salmon Creek (1111.310202);
1-18-077 HumboldtSec. 14, 15  T1N/R1W;
HB&M
Howe Creek (1111.110101);
1-18-079 HumboldtSec. 35  T3N/R1W;
HB&M
Palmer Creek (1111.110202);
1-18-084 Humboldt Portions of Sections 7, 8, 16, 17, 18,
 20, 21, 28, 29, 
T6N/R3E;
HB&M

Lupton Creek (1107.200102);
Noisy Creek (1107.300201);
Upper Cannon  Creek (1109.300603);
Pollock Creek (1109.200003);
Long Prairie Creek (1109.200002);

1-18-088 Humboldt Sect. 30, T8N/R1E;
 HB&M
McDonald Creek (1108.100002);
1-18NTMP-006 Humboldt Portions of Section 35, T3S/R4E;
HB&M
Steelhead Creek (1111.410403);
1-18-083 Humboldt Sect. 21, 22, 27, 28 T3N/R4E;
HB&M
Showers Creek (1109.300302);
Deer Creek (1109.300303)
1-18-096 Humboldt Portions of Sections 35, 36,T4N/R1E;
Sections 1, 2, 12, T3N/R1E; 
HB&M
Lower North Fork Elk River (1110.000201);
Upper North Folk Elk River (1110.000202)
1-18-100 Humboldt Sect.13, 23, 24 T4N/R1E;
Sect. 18, 19, T4N R2E 
HB&M
Upper Freshwater Creek (1110.000101);
Little Freshwater Creek (1110.000103)
1-18-102 Humboldt Sect.16, T5N/R1E;
HB&M
Lower Jacoby Creek (1110.000503);
Fay Slough (1110.000105)
1-18-103 Humboldt Sect.1, 12, T12N/R1E;
Sect. 5, 6, 7, 41,42, T12N/R2E

HB&M
Ah Pah Creek (1105.110702);
Tarup Creek (1105. 110703)
1-18-094 Humboldt Sect. 2, 3, 10, 11, 12, 14, 15, T1S/R4E;
HB&M
Mill Creek (1111.130202);
Horse Creek (1111.220403)
1-18-109 Humboldt Portions of Sections 25, 26,T6N/R2E;
Sect. 18, 19, 30, T6N/R3E;
HB&M
Pollock Creek (1109.200003);

THP # County Location CalWater Watershed ID
2-18-056Lassen
Sec. 20, 21, 27-34,  T29N/R11E;
MD B&M
Cheney Creek (8637.200400);
Upper Gold Run (8637.200803);
Upper Willard Creek (8637.200301)
THP # County Location CalWater Watershed ID
1-18NTMP-010MendocinoSec. 1, T16N/R16W;
MDB&M
Upper Albion River (1113.400006)
1-18-014MendocinoSec. 22, 25, 26, 27,34;
T21N/R16W;
MDBL&M
Mud Creek (1111.330301)
1-18-067MendocinoSec. 30, 31; T15N/R16W;
MDBL&M
Lower Greenwood Creek (1113.610001)
1-18-049MendocinoSec. 25, 26, 35, 36; T19N/R17W;
MDBL&M
Pudding Creek (1113. 200508)
1-18-072MendocinoSec. 30, T23N/R17W;
MDB&M

Lower Usal Creek (1113. 110101)
Cotteneva Creek (1113.120101)
Lower Hollow Tree Creek (1111.320302)

1-17-052MendocinoSec. 21, T16N/R17W;
MDBL&M

Albion River (1113. 400004)
Lower Albion River (1113.400003)

1-18-101MendocinoSec. 2, 11-14, T16N/R15W;
MDB&M

Mettick Creek (1113.300103)

1-18-105MendocinoSec. 7, 8, 17, T16N/R16W;
MDB&M
Lower Albion River (1113.400003);
Middle Albion River (1113.400001);
South Fork Albion River (1113.400002);
Little River (1113.400004)
THP # County Location CalWater Watershed ID
2-17-068NevadaSec. 25, T19N/R12E;
Sec. 19, 29, 31, T19N/R13E;
MDB&M
Jackson Meadow Reservoir (5517.430002);
Bowman Lake (5517.330001);
English Meadow (5517.430001);
East Fork Creek (5517.420101)
2-18-042NevadaSec. 11, T16N/R9E;
MD B&M
Little Deer Creek (5517.200102)
THP # County Location CalWater Watershed ID
2-18-046PlumasSec. 2, 3 and 4, T21N/R08E;
Sec. 16, 17, 22, 23, 26-31, 33, 34 and 35 
T22N/R08E;
MD B&M
Post Creek (5518.220102);
Little Bear Creek (5518.330502);
Willow Creek (5518.320402);
Upper Fall River(5518.320603);
2-18-043Plumas, Yuba 
and Butte
Sec. 2, 3, 10, 11, 15, 21, 22 and 29, T20N/R08E;
Sec. 12, 13, 14, 23-27, 33, 34 and 35,
T21N/R08E;
Sec. 18, 30, and 31; T21N/R09E;
MD B&M

Brushy Creek (5517.520201);
Deadwood Creek(5517.510204);
Gold Run(5517.520202);
Lewis Flat(5518.230001);
Rock Creek(5518.220101);
Valley Creek(5518.230002)
THP # County Location CalWater Watershed ID
1-18-087San MateoSec. 22, T7S/R4W;
MDB&M
Harrington Creek (2202.300002)
THP # County Location CalWater Watershed ID
1-18-097Santa CruzSec. 1, 2; T10S/R1W;
Sec. 35, 26; T9S/R1W;
MDBL&M
Soquel Creek (3304.130101)
THP # County Location CalWater Watershed ID
2-18-026ShastaSec. 25, 35, 36, T36N/R4W;
Sec. 3, T35N/R4W;
MDB&M
Nawtawaket Creek (5506.200104);
Upper Salt Creek (5506.200206);
Lower Middle Salt Creek (5506.200201);
Upper Middle Salt Creek (5506.200210)
2-18-032ShastaSec. 20, 21, 29, T38N/R2W;
MDB&M
Battle Creek (5505.230001);

2-18-036ShastaSec. 28, 32, 33, T39N/R01W;
MDB&M
Battle Creek (5505.230001);
Star City Creek (5505.230002);
Angel Creek (5505.240702);
2-18-044ShastaSec. 24, T31N/R01W;
MD B&M

Lower South Fork Bear Creek (5507.220102);

2-18-057ShastaSec. 9, 10, 11, 15, 16, 22 and 23,T37N/R2E;
Sec. 33, 34 and 35, T38N/R2E;
MD B&M

Clark Creek (5526.310103);

Rock Creek (5526.310203)

2-18-00112ShastaSec. 20, 21, 28, 29, 30 and 32, T36N/R01E;
MD B&M

Roaring Creek (5526.140203);

2-18-058ShastaSec. 6 and 7, T37N/R04W;
Sec. 1 and 2, T37N/R05W;
MD B&M

Mears Creek (5525.100102);

THP # County Location CalWater Watershed ID
2-18-049SierraSec. 11, T19N/R10E;
MD B&M
Kanaka Creek (5518.110405);
THP # County Location CalWater Watershed ID
2-18-033SiskiyouSec. 15, 21, 22, 27, 29, 33, T39N/R01E;
MD B&M
Bull Creek (5505.240201);
Dead Horse Canyon (5505.240202);
Racoon Creek (5505.240302)
2-18-064SiskiyouSec. 23, 27, 33 T46N/R10W;
Sec. 19, 31 T46N/R09W;
MD B&M.
Kingman Creek (1105.330105);
Collins Creek (1105.350503);
Dona Creek (1105.350502);
Mckinney Creek (1105.350501)
2-18-00125SiskiyouSec. 4, T38N/R02E;
Sec. 17, 20, 29 and 32, T39N/R02E;
MD B&M
Dead Horse Canyon (5505.240202);
North Fork Bear Creek (5526.430301);
Upper Bear Creek (5526.430302)
THP # County Location CalWater Watershed ID
1-18-076SonomaSec. 17, 20, T9N/R13W;
MDB&M
Middle South Fork Gualala River(1113.850103);

1-12-040SonomaSec. 7, 8, 17, T7N/R11W;
MDBL&M (Projected)
Willow Creek (1114.110401);

1-18-082SonomaSec. 1, 2, T9N/R14W;
Sec. 35; T10N; R14W;
MDBL&M (Portions of German Landgrant)
Stewarts Point (1113.850301);
Middle South Fork Gualala River (1113.850103)

THP # County Location CalWater Watershed ID
4-18-004TuolumneSec. 33, T2N/R17E;
MDB&M
Basin Creek (1105.420605);
Cottonwood Creek (1111.410401)
4-16-001TuolumneSec. 34-36, 25, 26,T05N/R16E;
MDB&M
Skull Creek (6534.500503);
4-18NTMP-001TuolumneSec. 11, 14, 15, 22, 23, T03N/R17E;
MDB&M
Brownes meadow (6536.400603);
THP # County Location CalWater Watershed ID
2-18-025TrinitySec. 3, 4, 17, 21, T35N/R8W;
MDB&M
Strope Creek (1106.400807);
Davis Creek (1106.400802);
East Fork Stuart Glunch (1106.400801)
2-18-040Trinity

Sec. 2, 3, T31N/R08W;
Sec. 33, T32N/R08W;
MD B&M

Upper Indian Creek (1106.310404);

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
ArticleCalifornia Fires, Floods, and Landslide, 2005
PowerPointCalifornia Debris Flows & The Effects of Fire, 2005
California Geology ArticleFire and Rain Equal Mudflows, Big Sur 1972
California Geology Article
Hazard Evaluation Following the Tunnel (Oakland Hills) Fire, Oct 19-23, 1991
Burn Site FormCalifornia Geological Survey Burn Site Evaluation Form

 

More Documents Prepared by the CGS Forest and Watershed Geology Program

Document Description
SR 217Special 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.

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

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
SP 120 Errata

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.