Little Goose Lock and Dam
| Little Goose Dam | |
|---|---|
From the north side of the Snake River
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| Location | Columbia / Whitman counties, Washington, USA |
| Coordinates | 46°35′15″N 118°01′34″W / 46.5873693°N 118.0260593°WCoordinates: 46°35′15″N 118°01′34″W / 46.5873693°N 118.0260593°W |
| Construction began | June 1963 |
| Opening date | 1970 |
| Operator(s) | U.S. Army Corps of Engineers |
| Dam and spillways | |
| Type of dam | Concrete-gravity, run-of-the-river |
| Height | 98 ft (30 m) |
| Length | 2,655 ft (809 m) |
| Elevation at crest | 643 ft (196 m) above sea level |
| Spillway type | Service, gate-controlled |
| Reservoir | |
| Creates | Lake Bryan |
| Total capacity | 516,300 acre·ft (0.6368 km3) |
| Surface area | 10,025 acres (40.57 km2) |
| Power station | |
| Turbines | 6 x 135–153 MW (181,000–205,000 hp) units |
| Installed capacity | 932 MW (1,250,000 hp) |
Little Goose Lock and Dam is a hydroelectric, concrete, run-of-the-river dam in Columbia and Whitman counties in the state of Washington, on the Snake River. The dam is located 9 miles (14 km) northeast of the town of Starbuck, and 25 miles (40 km) north of Dayton.
Construction began in June 1963 on what was Little Goose Island. The main structure and three generators were completed in 1970, with an additional three generators finished in 1978. Generating capacity is 810 megawatts (1,090,000 hp), with an overload capacity of 932 megawatts (1,250,000 hp). The spillway has eight gates and is 512 feet (156 m) long.
Little Goose Dam is part of the Columbia River Basin system of dams.
Lake Bryan, named for Doctor Enoch A. Bryan, is formed behind the dam. The lake stretches to the base of Lower Granite Dam, 37 miles (60 km) upstream. Lake Herbert G. West, formed from Lower Monumental Dam runs 28 miles (45 km) downstream from the base of the dam.
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