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 available for viewing on this web page 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 webpage.
NOTE: The CGS THP library (this page) will remain operational until March 31, 2019. After that date, THP documents will only be available via CalTREES. To start using the CalTREES system immediately, click the CalTREES logo below.
ABOUT CALTREES: Timber harvest permitting in California is moving into a new era with the launch of CalTREES by CAL FIRE and the AB 1492 Timber Regulation and Forest Restoration Program. The CalTREES system streamlines the submission and review processes for timber harvesting plan (THP) documents. For more information, please visit the
CalTREES Information Portal, the
CalTREES FAQ web page, or
email CalTREES Support.
Sec. 13, T8N/R1E;Sec. 7, 17-18, T8N/R2E;HB&M
Sweet Briar (5525.100106)
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.
Review of July 2002 EPA Analysis Impacts of Timberland Management on Water Quality. Dated November 27, 2002.
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 SheetAppendix 2 - Photos
SP 120SP 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
Phase 2 Study