| Trinity Dam | |
|---|---|
 | |
| Country | United States |
| Location | Whiskeytown-Shasta-Trinity National Recreation Area, Trinity County, California |
| Coordinates | 40°48′04″N 122°45′48″W / 40.80111°N 122.76333°W |
| Construction began | 1957 |
| Opening date | 1962 |
| Owner(s) | U.S. Bureau of Reclamation |
| Dam and spillways | |
| Type of dam | Earthfill |
| Impounds | Trinity River |
| Height | 538 ft (164 m) |
| Length | 2,450 ft (750 m) |
| Spillway type | Morning glory |
| Spillway capacity | 22,400 cu ft/s (630 m3/s) |
| Reservoir | |
| Creates | Trinity Lake |
| Total capacity | 2,447,650 acre⋅ft (3,019,130 dam3) |
| Inactive capacity | 400,000 acre⋅ft (490,000 dam3)[1] |
| Catchment area | 692 sq mi (1,790 km2) |
| Surface area | 17,722 acres (7,172 ha) |
| Power Station | |
| Hydraulic head | 426 ft (130 m) |
| Turbines | 2x Francis |
| Installed capacity | 140 MW |
| Annual generation | 424,192,000 kWh (2001–2012)[2] |
Trinity Dam is an earthfill dam on the Trinity River located about 7 miles (11 km) northeast of Weaverville, California in the United States. The dam was completed in the early 1960s as part of the federal Central Valley Project to provide irrigation water to the arid San Joaquin Valley.
Standing 538 ft (164 m) high, Trinity Dam forms Trinity Lake – California's third largest reservoir, with a capacity of more than 2,400,000 acre-feet (3,000,000 dam3). The dam includes a hydroelectric plant, and also provides flood control to the Trinity and Klamath river basins.
Below the dam is Lewiston Lake, formed by a second dam, which diverts water through a 10.7 mile tunnel to the Sacramento Valley.
- ^ Ritzema, Randall S.; Newlin, Brad D.; Van Lienden, Brian J. (October 2001). "Appendix H: Infrastructure" (PDF). CALVIN Project. University of California Davis. Archived from the original (PDF) on 2017-11-06. Retrieved 2014-01-25.
- ^ "California Hydroelectric Statistics & Data". California Energy Commission. Archived from the original on 2018-02-26. Retrieved 2018-04-26.