Garrison

OperatingHydro

Ranked #1 of 1 Hydro plants in ND#44 of 1454 nationally

583.4 MW Hydro operating in Mercer, ND — Southwest Power Pool

EIAGEMWD

583.4 MW

Nameplate Capacity

Generators

units

Conventional Hydroelectric

Technology

1956

Operating Since

Location

Coordinates

47.4945, -101.4115

County

Mercer, ND

Nearby Plants

Coal Creek
Distillate Oil1215.6 MW · 23.1 km
Leland Olds
Lignite656 MW · 24.7 km

Ownership & Operator

Owner data does not fully agree across sources.

EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.

Field	EIA	GEM	Wikidata
Operator	USACE-Omaha	US Army Corps of Engineers - Omaha District	—
Owner(s)	USACE-Omaha	US Army Corps of Engineers - Omaha District [100%]	—
Status	Operating	operating	—

Ownership Chain

GEM identifies the owner as US Army Corps of Engineers - Omaha District [100%]

This entity is not yet in the GEM ownership database — chain unavailable.

About

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.

Read more on Wikipedia

The Garrison hydroelectric plant, located in Mercer County, North Dakota, has a total capacity of 583.4 MW across five generators. It commenced operations in 1956 and is owned and operated by USACE-Omaha. The plant utilizes water as its primary fuel source and employs conventional hydroelectric technology. Garrison is the largest hydroelectric plant in North Dakota and ranks 44th nationally among 194 hydroelectric facilities.

In the latest annual reporting period, the plant generated 2,060,635 MWh of electricity, achieving a capacity factor of 40.3%. The Garrison plant operates within the Southwest Power Pool (SPP) balancing authority and is situated in the Midwest Reliability Organization (MRO) NERC region.

Generated from EIA, GEM, and public data sources