They purchased General Electric steam turbine technology, based on patents originally held by inventor Charles Gordon Curtis.

[5] Puget Sound Traction and Lighting Company (now Puget Sound Energy) bought the Seattle Electric Company in 1912; the Georgetown Steam Plant powered the Seattle-to-Tacoma Interurban and Seattle streetcars; it also provided residential and industrial power to Georgetown.

[8] At the time of its landmarking, it contained the "last operating examples of the world's first large scale, steam turbine".

[9] The building itself, "built by a fast-track construction process, was designed and supervised by Frank W. Gilbreth, later a nationally famous proponent of efficiency engineering.

[11] Paul Carosino and Lilly Tellefson founded the Georgetown PowerPlant Museum in 1995 to restore, maintain and operate the plant.