The Lower Baker Dam was constructed by Puget Sound Power and Light beginning April 1, 1924. Despite delays caused by worker strikes and a harsh winter, the dam was completed on October 19, 1925 and began service on November 19, 1925. The construction project included the dam, power house, connecting tunnel, 92 miles of transmission lines and substations at Beverly Park and Sedro-Wooley. It was the fifth major hydro-electric plant operated by Puget Sound Power and Light. The dam was enlarged in 1960. After a 1965 earthquake and landslide, the dam was partially rebuilt in 1967. It is currently owned and operated by Puget Sound Energy.
George P. Jessup was the superintendent of the construction of the Lower Baker Dam. He lived in Concrete with his family during the building of the dam and later moved around the country working on other projects.
From the guide to the George P. Jessup Photographs of the Lower Baker Dam Construction, 1924-1925, (Western Washington University Heritage Resources)
