McNary — Umatilla, OR — Operational Power Plant
EIA 860M DataOperational
Total Capacity
990.5 MW
Summer: 966.5 MW | Winter: 966.5 MW
Technology
Hydro
14 generators
First Unit Online
December 1, 1953
McNary is a hydro power plant in Umatilla County, OR with 14 generating units totaling 990.5 MW of nameplate capacity. It is operated by USACE Northwestern Division. Its first unit came online in 1953.
About this plant
McNary Dam is a 1.4-mile (2.2-km) long concrete gravity run-of-the-river dam which spans the Columbia River. It joins Umatilla County, Oregon with Benton County, Washington, 292 miles (470 km) upriver from the mouth of the Columbia. It is operated by the U.S. Army Corps of Engineers' McNary Lock and Dam office. The dam is located a mile (2 km) east of the town of Umatilla, Oregon, and 8 miles (13 km) north of Hermiston, Oregon. The dam was originally planned to be named Umatilla Dam, but the Flood Control Act of 1945 renamed the dam in honor of Senator Charles L. McNary of Oregon, who had died in February 1944.
Source: Wikipedia
Capacity rank
- #24 in the U.S. by capacity
- #4 in OR by capacity
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Monthly generation history
Source: EIA Form 923
Generators (14)
Operational
14 generators
14 operational generators totaling 990.5 MW · online 1953–1957
Plant Information
| Plant ID | 3084 |
| Plant Name | McNary |
| Operator | USACE Northwestern Division |
| Sector | Electric Utility |
| Balancing Authority | BPAT |
| Power Market | |
| County | Umatilla |
| State | |
| Status | Operational |
| Generation Type(s) | Hydro |
| Total Nameplate Capacity (MW) | 990.5 |
| Total Summer Capacity (MW) | 966.5 |
| Total Winter Capacity (MW) | 966.5 |
| Generating Units | 14 |
| Operational Units | 14 |
| Planned Units | 0 |
U.S. county map showing Umatilla, OR
Data source: U.S. Energy Information Administration EIA Form 860M
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