Nine Mile Dam

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Nine Mile Hydroelectric Power Plant Historic District
Nine Mile Dam 20150704.JPG
Nine Mile Dam is located in Washington (state)
Nine Mile Dam
Nine Mile Dam
Location in Washington
Nine Mile Dam is located in the United States
Nine Mile Dam
Nine Mile Dam
Location in the United States
Nearest cityNine Mile Falls, Washington
Arealess than one acre
Built1906 (1906)
ArchitectSanderson & Porter; Zimmerman, William F.
Architectural styleBungalow/American Craftsman, vernacular industrial
MPSHydroelectric Power Plants in Washington State, 1890--1938 MPS
NRHP reference #90001861[1]
Added to NRHPDecember 6, 1990

Nine Mile Falls Dam is a dam on the Spokane River, in the unincorporated community of Nine Mile Falls, Washington. It was built on the site of the falls in 1908, creating Nine Mile Reservoir. The dam was designed by the New York engineering firm of Sanderson & Porter, and originally constructed to satisfy the power needs of the Spokane and Inland Empire Railroad interurban trolley lines.[2]

Washington Water Power (now the power company Avista) purchased the site in 1925, and continues to operate it as one of its six hydroelectric generating plants on the Spokane River. The 58-foot-high cyclopean masonry dam and its powerhouse, storehouse, ten cottages and other structures were placed on the National Register of Historic Places in 1990.[3]

See also[edit]


  1. ^ National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
  2. ^ "Avista – Spokane River Project". 2009-06-18. Retrieved 2013-05-16.
  3. ^ Times. "Landmarks: Nine Mile Falls Dam at core of enclave – – May 3, 2012". Retrieved 2013-05-16.

External links[edit]

Media related to Nine Mile Hydroelectric Development at Wikimedia Commons

Coordinates: 47°46′33″N 117°32′46″W / 47.77583°N 117.54611°W / 47.77583; -117.54611