| John Day Dam | |
|---|---|
.jpg) John Day Dam | |
| Location | Sherman County, Oregon / Klickitat County, Washington United States |
| Coordinates | 45°42′59″N 120°41′40″W / 45.71639°N 120.69444°W |
| Construction began | 1958[1] |
| Opening date | 1971 |
| Construction cost | US$511 million |
| Dam and spillways | |
| Type of dam | Concrete gravity, run-of-the-river |
| Impounds | Columbia River |
| Height | 56 m (184 ft) |
| Length | 2,327 m (7,635 ft) |
| Spillway type | Service, gate-controlled |
| Reservoir | |
| Creates | Lake Umatilla |
| Total capacity | 2,530,000 acre⋅ft (3.12×109 m3) |
| Power Station | |
| Operator(s) | U.S. Army Corps of Engineers |
| Type | Run-of-the-river |
| Turbines | 16 × 140 MW |
| Installed capacity | 2,240 MW |
| Annual generation | 8,418 GWh (2009)[2] |
The John Day Dam is a concrete gravity run-of-the-river dam spanning the Columbia River in the northwestern United States.[3] The dam features a navigation lock plus fish ladders on both sides. The John Day Lock has the highest lift (at 110 feet or 34 meters) of any U.S. lock.[4] The reservoir impounded by the dam is Lake Umatilla,[5] and it runs 76.4 miles (123.0 km) up the river channel to the foot of the McNary Dam. John Day Dam is part of the Columbia River Basin system of dams.
- ^ Cite error: The named reference
oclcwas invoked but never defined (see the help page). - ^ "Carbon Monitoring for Action".
- ^ "The Columbia River System Inside Story" (PDF). BPA.gov. pp. 14–15. Archived from the original (PDF) on 27 May 2010. Retrieved 17 July 2010.
- ^ "A Sightseer's Guide to Engineering - Details for John Day Lock and Dam". Archived from the original on 2008-04-15.
- ^ U.S. Geological Survey Geographic Names Information System: Lake Umatilla