Soil and Rock Logging, Classification, and Presentation

The Soil and Rock Logging, Classification, and Presentation Manual, which is included in the Geotechnical Manual, documents the Department’s standard of practice for describing and presenting soil and rock encountered during and after drilling investigations.  The terminology, definitions, and formatting of soil and rock descriptions presented in these documents are used in all products (i.e., reports, correspondence, figures) produced by or for Caltrans.

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Current Version: Implementation Date - July 1, 2023

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