The collection consists of materials from George Basye, a water rights lawyer who was well known for his work related to water and irrigation issues in the Sacramento Valley. Items in the collection include speeches, legal documents, and articles written by Basye and related to California water issues. The collection also includes correspondence, legal documents, and other materials related to the founding of the American River Reclamation District no. 1 in the early 1900s.

The collection contains pamphlets, unpublished reports, speeches, minutes of meetings, news releases, and other materials produced by the Eel River Water Council.

The collection consists of correspondence, writings, speeches, and report materials. Hutchins served for 62 years in various bureaus and offices of the U.S. Dept. of Agriculture; his major work dealt with water laws and water rights in the Western States. He also lectured on water law and institutions at the University of California.

The collection consists of materials compiled by R.B. Marshall, former chief geographer of the U.S. Geological Survey, related to Hetch Hetchy Valley, Mississippi River Basin, water rights, and the Marshall Plan for irrigation of California's Central Valley.

The collection consists of speeches relating to the activities of the District, the State Water Project, and water resources development in the San Francisco Bay Area, particularly the North Bay Aqueduct.

The collection consists of correspondence, reports, data, minutes, speeches, and clippings related to the associations, water supply in Contra Costa County and Solano County, and salt water encroachment in the San Francisco Bay Area.

The collection consists primarily of speeches by Warne during his tenure as Director of the California Dept. of Water Resources, 1961-1966; also includes miscellaneous correspondence and articles written by Warne during this period.