California Department of Transportation



Geotechnical Manual

The Geotechnical Manual documents the Department’s standards of practice for geotechnical investigations, design, reporting, quality management, and other geotechnical business practices.  Geotechnical Services staff and consultants performing work on behalf of the Department must adhere to the procedures in the Geotechnical Manual.



  June 2012
Geotechnical Manual Program Delivery Plan   December 2013
Quality Management Program   May 2012
Project Management   June 2013
Geotechnical Archive   May 2013
Consultant Oversight   August 2013
Communication and Reporting   March 2012
Foundation Reports for Bridges   January 2009
District Preliminary Geotechnical Reports   May 2013
Geotechnical Design Reports   January 2006
Geotechnical Design Reports for Earth Retaining Systems   April 2013
Preliminary Investigations   January 2013
Geotechnical Drilling   June 2012
Borehole Location   March 2012
Soil and Rock Logging and LOTB Drafting   May 2013
Geophysical Services   December 2012
Laboratory Testing   September 2010
Standard Plan Designs   November 2010
Soil Correlations   March 2014
ARS Online   January 2013
Sound Walls   July 2010
Rock Cut Slope Design   June 2013
Geosynthetics   June 2013

A discussion forum titled Geotechnical Manual has been placed on the GS Discussion Board for staff to post their questions or comments for improvements.