Slides documenting the development of City Light's public power facilities including dams, power houses, transmission lines, substations, and methods of wiring.

Records documenting Michael Hildt's work on the Seattle City Council from 1978-1985; records address issues such as conservation and desegregation and include information on Hildt's work with the Pike Place Market and his work with various committees, including the Energy Committee and Urban Development and Housing Committee.

Photograph albums, 1919-1936, illustrating the planning and construction of Gorge and Diablo Dams and their respective power houses on the Skagit River.

Planning records for Seattle's Boundary Dam.

Photographs of Masonry Dam construction, including construction workers and equipment, dam site, clearcutting, trains and railroads, and bridges.

Records of organizations concerned with electric power planning in the western United States.