| Wanapum Dam | |
|---|---|
 Dam viewed from downstream on the west bank | |
| Official name | Wanapum Dam |
| Location | Grant / Kittitas counties, Washington |
| Coordinates | 46°52′31″N 119°58′16″W / 46.875213°N 119.971004°W |
| Construction began | 1959 |
| Opening date | 1963 |
| Construction cost | US$93,277,690[1] |
| Dam and spillways | |
| Impounds | Columbia River |
| Height | 185 feet (56 m)[1] |
| Length | 8,320 feet (2,540 m)[1] |
| Reservoir | |
| Creates | Lake Wanapum |
| Total capacity | 796,000 acre-feet (982,000,000 m3) |
| Power Station | |
| Commission date | 1963 |
| Turbines | 10 x 104 MW Kaplan-type[2] |
| Installed capacity | 1,185 megawatts (1,589,000 hp)[3] |
Wanapum Dam is a run-of-the-river hydroelectric project located on the Columbia River downstream (south) from Vantage, Washington where Interstate 90 crosses the Columbia from Grant County into Kittitas County. It is owned by the Grant County Public Utility District. Its reservoir is named Lake Wanapum.
The dam, and its lake, are named after the Wanapum Indians. The dam has a rated capacity of 1,185 megawatts and annually generates over 4 million megawatt-hours.[2]
- ^ a b c Grant County Public Utility District Website
- ^ a b "Hydroelectric Plants in Washington". IndustCards. Retrieved 4 March 2014.
- ^ "Grant PUD: Generation". Grant PUD. Retrieved 2020-01-30.