Folder of material regarding the original organization of the district; transmission, treatment and distribution of water to water service areas, etc.

Folder containing U.S. Geological Survey topographic maps of various quadrangles and a sketch map of proposed improved highways.

Folder containing a map of the State showing the principle factors in the water supply and a topographic map of Southern California, etc.

Folder containing correspondence and photographs regarding the design, construction, leaking and reinforcement of the multiple arch dam.

Folder containing photographs showing construction of the dam and data on height, capacity, slopes, etc.

Ffolder containing material regarding dam construction and costs, design, water rights, power development, borings, etc.

Folder containing photographs of the construction of the dam and power house.

Folder containing specifications for the construction of the dam and photographs of the site, dam construction and diversion works.

Reports, papers, maps, and photographs related to water projects. The materials primarily document projects located in San Diego County but alsos includes projects in Los Angeles, other western states, and several international locations.

Folder containing photographs of Hansen Dam construction, information regarding construction costs, dimensions, and safety of various dams.