The collection consists of notes, memoranda, correspondence, speeches, reports, maps, photographs, and records relating to the U.S. Bureau of Reclamation, Central Valley Project, Sacramento-San Joaquin Delta Region, salinity, the Delta hearings, water rights, acreage limitations, the Reber Plan, fish and wildlife, USBR/CVP contracts and leases, floods and flood control, and miscellaneous power and energy issues.

The collection consists of correspondence, reports, hydrological data, maps and memoranda pertaining to reservoirs, canals, water delivery systems, flood control and irrigation projects, water supply and land appraisals throughout California and southern Oregon, with particular reference to units of the Central Valley Project.

This collection contains newspaper clippings, articles, and other material on the history of the Gage Canal, the system built in 1898 to supply water to the city of Riverside, California. Materials in the collection cover the sale of the Gage Canal company, various lawsuits and legal issues, and correspondence and photographs belonging to John M. Mylne, the superintendent and engineer of the Gage Canal System.

The colleciton consists of reports on the activities of the Department and speeches relating to the construction and financing of the State Water Project and particular sub-projects, and to the growing political controversy surrounding state water policy.

Papers include legislative histories of San Luis Act of 1959, Reclamation Act of 1902, Central Valley Project Act of 1933, and the Federal Power Act; also includes cumulated material on "unjust enrichment" in operation of State Water Project and on court cases involving the Dept. of Water Resources in period 1950-65; files on State Water Project financing.

The collection consists of reports, legal opinions, and comments concerning the Central Valley Project, water districts and reclamation districts, and water rights on the San Joaquin River and elsewhere in California.

The collection consists of articles, addresses by Hyatt, and clippings, pertaining to dams, water rights, salt water intrusion, hydroelectric power, the California Water Plan, and other aspects of water in California.

The collection consists of economic and engineering reports written by Augustus Kempkey, a consulting civil engineer; design of structures, preparation of detailed plans and specifications, supervision and administration of construction and operation, appraisals as to value for rate fixing, taxation, sale, and other purposes.

The Ronald B. Robie papers consist of files and documents assembled by Robie during his years with the Assembly Committee on Water, the State Water Resources Control Board, and the California Department of Water Resources. The collection contains materials whose dates span from 1963-1982; the majority, however, are concentrated in the period from 1967-1979.

The collection consists of the United States Bureau of Reclamation contracts with California water districts, irrigation districts, wildlife refuges, and municipalities.