Garrison — Mercer, ND — Operational Power Plant
EIA 860M DataOperational
Total Capacity
583.4 MW
Summer: 510 MW | Winter: 510 MW
Technology
Hydro
5 generators
First Unit Online
January 1, 1956
Garrison is a hydro power plant in Mercer County, ND with 5 generating units totaling 583.4 MW of nameplate capacity. It is operated by USACE-Omaha. Its first unit came online in 1956.
About this plant
Garrison Dam is an earth-fill embankment dam on the Missouri River in central North Dakota, U.S. Constructed by the U.S. Army Corps of Engineers from 1947 to 1953, at over two miles (3.2 km) in length, the dam is the fifth-largest earthen dam in the world. The reservoir impounded by the dam is Lake Sakakawea, which extends to Williston and the confluence with the Yellowstone River, near the Montana border. The dam and resulting reservoir inundated approximately one-sixth (16.6%) to one-fourth (25%) of Fort Berthold Indian Reservation's land, resulting in the loss of homes, farmland, and community infrastructure for the Three Affiliated Tribes.
Source: Wikipedia
Capacity rank
- #44 in the U.S. by capacity
- #1 in ND by capacity
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Monthly generation history
Source: EIA Form 923
Generators (5)
Operational
5 generators
5 operational generators totaling 583.4 MW · online 1956–1960
Plant Information
| Plant ID | 2815 |
| Plant Name | Garrison |
| Operator | USACE-Omaha |
| Sector | Electric Utility |
| Balancing Authority | SWPP |
| Power Market | |
| County | Mercer |
| State | North Dakota (all interconnection requests in North Dakota) |
| Status | Operational |
| Generation Type(s) | Hydro |
| Total Nameplate Capacity (MW) | 583.4 |
| Total Summer Capacity (MW) | 510 |
| Total Winter Capacity (MW) | 510 |
| Generating Units | 5 |
| Operational Units | 5 |
| Planned Units | 0 |
U.S. county map showing Mercer, ND
Data source: U.S. Energy Information Administration EIA Form 860M
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