Long Lake Dam

Long Lake Dam is a concrete gravity dam on the Spokane River, between Lincoln County and Stevens County about 30 miles (48 km) northwest of Spokane in eastern Washington. It forms Long Lake (Washington), a 23.5 mi (37.8 km) long reservoir, and has a hydroelectric generating capacity of 71 megawatts.[1] The dam was built by Washington Water Power (now Avista Utilities), which operates five other dams along the Spokane.[2]

Long Lake Dam
CountryUnited States
LocationLincoln / Stevens counties, Washington
Coordinates47°50′14″N 117°50′23″W
Opening date1915
Dam and spillways
Type of damConcrete gravity
Height213 ft (65 m)
Length593 ft (181 m)
Reservoir
CreatesLong Lake
Total capacity105,000 acre⋅ft (130,000,000 m3)
Power Station
Turbines4x Francis
Installed capacity71 MW

Upon its completion in 1915, Long Lake Dam completely blocked salmon migrations to the upper portions of the Spokane River watershed, although much larger Grand Coulee Dam on the Columbia River extirpated salmon from the entire Spokane basin by 1942.[3]

Hydroelectric Power Plant
Historical photo of the dam and power plant on April 7, 1915.

The Long Lake Hydroelectric Power Plant was also built in 1915. It was listed on the National Register of Historic Places in 1988. The listing included one contributing building and five contributing structures on 15 acres (6.1 ha) in Lincoln County, Washington and Stevens County, Washington.[4]

It was built by the Washington Water Power Company[5]

See also

References
  1. "Long Lake Hydroelectric Development". Spokane River Project Hydro Relicensing. Avista Utilities. Retrieved 2011-10-23.
  2. "Timeline" (PDF). Spokane River Stewardship Partners. Archived from the original (PDF) on 2012-04-25. Retrieved 2011-10-23.
  3. "Spokane River". Columbia River History. Northwest Power & Conservation Council. Retrieved 2011-10-23.
  4. "National Register Information System". National Register of Historic Places. National Park Service. November 2, 2013.
  5. Lisa Soderberg (October 23, 1986). "National Register of Historic Places Inventory/Nomination: Long Lake Hydroelectric Power Plant". National Park Service. Retrieved June 20, 2018. With accompanying two photos
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