The collection consists of press releases, speeches (many by former DWR Directors), news clippings, reports, photographs, and miscellaneous memoranda on California water resources development during the period 1950-1965.

The collection consists of correspondence; technical reports on various aspects of irrigation; reports and surveys of specific irrigation projects throughout California, and in Colorado, Idaho, Montana, Nevada, and North Dakota; and miscellaneous material relating to water costs and requirements, water rights, groundwater and surface water supply, flood control, legislation, dendroclimatology, enclosed lakes, and the Central Valley Project and Feather River Project 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.