Country United States Type of dam Concrete gravity Creates Long Lake Opened 1915 | Opening date 1915 Length 593 ft (181 m) Height 65 m | |
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Location Lincoln / Stevens counties, Washington Similar Nine Mile Dam, Long Lake, Riverside State Park, Latah Creek, Fort Spokane | ||
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. The dam was built by Washington Water Power (now Avista Utilities), which operates five other dams along the Spokane.
Map of Long Lake Dam, Tumtum, WA 99034, USA
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. The power plant was entered onto the National Register of Historic Places in 1988.