Materials in this collection are from John L. Bacon and are related to his work on the Colorado River Commission, the Boulder dam (aka Hoover dam) project, water supply for California, division of Colorado River water within California, and affiliated matters. The collection includes extensive correspondence with individuals involved in the Boulder dam project.

The collection consists of reports, conference transcripts and summaries related to the Colorado River Basin Water Quality Control Project.

The collection consists of newspaper clippings related to Colorado River and western states water matters collected by California's Colorado River Board.

The collection consists of published and unpublished reports, correspondence, photographs, etc., primarily dealing with concrete testing for various dams in the U.S. and Turkey.

The Hiram W. Johnson papers include materials from Johnson's time as a Senator from California that pertain to the Colorado River, Hoover dam, Colorado River Compact, and All-American Canal.

The Wilbur F. McClure papers are comprised of documents pertaining to the Colorado River Commission and Colorado River Compact.

The collection consists of correspondence and reports concerning the Colorado River and flooding in the Imperial Valley, the Hetch Hetchy Project, Los Angeles water supply, the Southern Sierra Power Company, the salinity of San Francisco Bay and Sacramento-San Joaquin River Delta, flood control and irrigation projects, groundwater, and land appraisal throughout California and other western states.

The collection consists of correspondence, notes, news clippings, etc., related to Nordskog's water interests. Includes materials related to "water frauds" in the Owens Valley (including notes and an outline for his unpublished manuscript on the Owens Valley controversy), the Los Angeles Aqueduct, Boulder Dam, San Gabriel Dam, sea water conversion, California water problems, the Feather River Project, Metropolitan Water District of Southern California,the Colorado River, etc.