Georgetown Steam Plant, Power station museum in Georgetown, Seattle, US.

The Georgetown Steam Plant is a reinforced concrete power station built in 1906 by Stone and Webster, with a steel frame and large windows lighting the turbine hall. Inside, three Curtis steam turbines made by General Electric between 1906 and 1917 stand on their original foundations, alongside reciprocating steam engines and vintage machining tools. The building was designed and supervised by Frank W. Gilbreth.

Stone and Webster built the plant in 1906 for the Seattle Electric Company, using General Electric steam turbines based on Charles Gordon Curtis's patents. It supplied direct current to Seattle's streetcars and alternating current to Georgetown, then an independent city, and also powered the Seattle–Tacoma Interurban. Originally oil-fired, it switched to coal in 1917; after hydropower expansion it ran mainly for emergencies, last generating electricity in January 1953 and being decommissioned in 1972.

The plant demonstrates how early power generation shaped city life and tied neighborhoods like Georgetown to industrial infrastructure. The machines visible inside represent an era when power stations symbolized urban progress and technological advancement.

The plant is owned by Seattle City Light and began opening to the public once a month for open houses in 2014. Since 2021 it has been leased to the Georgetown Steam Plant Community Development Authority, which runs events including art and music exhibitions and an annual science fair. Visitors can see the last operable vertical Curtis steam turbines and vintage machining tools.

The plant preserves the last large-scale Curtis steam turbines still operating, machines that changed how power was generated across America. Few examples of these turbines remain, making this location a rare record of how energy technology evolved.