1. Maps showing ground-water conditions in the Cottonwood Creek area, Shasta and Tehama Counties, California, 1983-84 Yale Public content 1985. 2002-06-01T04:00:00Z. 2009-02-23T17:11:23Z. Geological Survey (U.S.). The Survey ; Open-File Services Section, Western Distribution Branch. English. Public. California, Shasta County, and Tehama County.