Consists of photographs depicting irrigation and water projects throughout California and other western locations collected by William Hammond Hall. The photographs were probably collected while Hall acted as California's first State Engineer (1878-1888) and while he worked in the private sector as a civil engineer. While the State Engineer, Hall developed the first state-wide water resource plan and he continued to work on irrigation and hydroelectric projects throughout his life. The photographs span the years 1868 to 1917 and depict various water projects including the Golden Gate Dam on the Feather River in Butte County; agriculture and irrigation projects in Kern County; the flooding of the New River (San Gabriel River) in Los Angeles County; the Yuba Dam in Bear Valley, Nevada County; the Donner Dam and Lake in Donner Valley, Nevada County; the Mill Dam and Truckee River in Nevada County; the Yuba River in Placer County; the Lake Hemet Dam in Riverside County; the Bear Valley Dam in San Bernardino; the San Diego Flume and Sweetwater Dam in San Diego County; construction of the Santa Ana Canal by the Bear Valley Irrigation Company in San Bernardino County; and other unidentified water and irrigation projects in unidentified locations. The collection also contains three panoramas, a six plate panorama showing the city of Redlands looking east toward the San Bernardino Mountains; a two plate panorama showing a reflecting pool and garden in Redlands; and finally a six plate panorama showing the Santa Ana Canal in San Bernardino County. The photographs comprise a variety of formats including albumen silver prints; gelatin silver print;and cyanotype. Photographers represented in the collection include Carleton E. Watkins; H.B. Wesner; H.E. Mathews; C.B. Waite; Rhea Brothers; San Diego View Company; Parker Photo (Francis Parker) and F.C. Fryett. Most photographs have stamp on back that reads: Collection of William Hammond Hall, C.E., San Francisco, California, 1846-1934.