This collection is the result of Frank E. Bonner's work as a consulting engineer for four California water agencies. The materials in this collection consist of water and hydroelectric power studies, maps, designs, computations, drawings, photographs, and reports on various constructed or proposed water developments in the Sierra Nevada.

The collection consists of reports and documents relating mainly to water-supply developments of the East Bay Municipal Utility District, Oakland, California. Includes material on the Mokelumne River Project, Briones Dam, the Lafayette Aqueduct, Camanche Dam and Reservoir, the American River Project, Chabot Dam and Reservoir, and Pardee Dam and Powerplant.