| Lucky Peak Dam | |
| Dam Crosses: | Boise River |
| Res Name: | Lucky Peak Reservoir |
| Country: | United States |
| Location: | Ada County, Idaho |
| Owner: | U.S. Army Corps of Engineers |
| Dam Type: | E |
| Dam Length: | 2340feet |
| Dam Height: | 340feet |
| Purpose: | Flood control, irrigation |
| Cost: | $19 million (1955) |
| Res Capacity Total: | 307000acre.ft |
| Res Catchment: | 2680sqmi |
| Res Surface: | 2820acres |
| Res Elevation: | 3050feet |
| Location Map: | USA#Idaho |
| Location Map Caption: | Location in the United States##Location in Idaho |
| Coordinates: | 43.5283°N -116.0531°W |
| Plant Turbines: | 2 x 45 MW, 1 x 11 MW Kaplan-type[1] [2] |
| Plant Capacity: | 101 MW |
| Plant Annual Gen: | 321,790,000 KWh |
Lucky Peak Dam is a rolled earth and gravel fill embankment dam in the western United States, located on the Boise River in southwestern Idaho. In Ada County east of Boise, it is directly downstream of Arrowrock Dam, a concrete arch dam completed in 1915. At the time of its construction in the early 1950s, Lucky Peak's primary purpose was flood control, with a secondary purpose of The normal operating elevation of the full reservoir is above sea level, the empty reservoir's elevation (Boise River) is
Construction began in November 1949 by the U.S. Army Corps of Engineers. Most of the federal dams in southern Idaho, including the others on the Boise River, were built by the Bureau of Reclamation, not the Corps of Engineers. The Idaho Power Company, a private utility, built multiple hydroelectric dams on the
Located along State Highway 21, 10miles upstream from the city of Boise, it was built without hydroelectric power generation. Construction of the powerhouse began in 1984 and it became operational in 1988, generating electricity primarily for
The dam was named after a nearby mountain in the Boise Range, about 4miles north of the dam (43.605°N -116.062°W). The summit elevation of Lucky Peak mountain (a.k.a. Shaw Mountain) is .[3]
The dam forms Lucky Peak Lake and is surrounded by Lucky Peak State Park.
The dam is also in close proximity to the Lucky Peak Dam Zeolite Occurrence.[4]