- Clean firm
- Operating
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Operating
Garrison: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Garrison
Power plant · Hydro
Key facts
Power plant · Hydroran 39% of 2025 Operating- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1956
- Net generation, 2025
- 2,004,511 MWh
- Grid
- 230 kV, 115 kV to WAPA-- Western Area Power Administration (SWPP)
- Location
- Mercer County, North Dakota
- Operated by
- USACE-OmahaSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Operations
- Net generation, 2025
- 2,004,511
MWh - Fuel burned, 2025
- 6,839,392
MMBtu - Capacity factor, 2025
- 39.2
% - Heat rate, 2025
- Not stated
| Year | Net generation (MWh) | Fuel burned (MMBtu) | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|---|
| 2025 | 2,004,511 | 6,839,392 | 39.2% | — |
| 2024 | 2,060,635 | 7,030,886 | 40.2% | — |
| 2023 | 2,119,102 | 7,230,377 | 41.5% | — |
| 2022 | 1,791,409 | 6,112,286 | 35.0% | — |
| 2021 | 1,989,053 | 17,591,185 | 38.9% | — |
| 2020 | 2,450,395 | 21,482,613 | 47.8% | — |
| 2019 | 3,179,292 | 28,311,595 | 62.2% | — |
| 2018 | 3,180,154 | 28,952,123 | 62.2% | — |
| 2017 | 2,582,107 | 23,788,952 | 50.5% | — |
| 2016 | 1,912,005 | 17,651,629 | 37.3% | — |
| 2015 | 2,094,168 | 19,515,552 | 41.0% | — |
| 2014 | 2,531,360 | 24,073,234 | 49.5% | — |
| 2013 | 1,852,421 | 17,673,949 | 36.2% | — |
| 2012 | 2,477,230 | 23,573,321 | 48.3% | — |
| 2011 | 2,580,042 | 25,067,686 | 50.5% | — |
| 2010 | 2,042,118 | 19,922,903 | 40.0% | — |
| 2009 | 1,475,251 | 14,398,451 | 28.9% | — |
| 2008 | 1,252,790 | 12,344,993 | 24.4% | — |
| 2007 | 1,305,393 | 12,902,504 | 25.5% | — |
| 2006 | 1,521,034 | 15,087,135 | 29.8% | — |
| 2005 | 1,341,824 | 13,416,898 | 26.3% | — |
| 2004 | 1,545,864 | 15,492,649 | 30.2% | — |
| 2003 | 1,723,904 | 17,654,501 | 33.7% | — |
| 2002 | 1,592,616 | 16,201,683 | 31.2% | — |
| 2001 | 1,332,076 | 13,764,341 | 26.1% | — |
How these are worked out
Net generation and fuel burned are the monthly figures EIA publishes in its bulk electricity file, from the plant's Form 923 reports; a year is the sum of its months. Capacity factor is a full year's net generation over today's nameplate capacity times the hours in that year (8,784 in a leap year), so a plant uprated or partly retired since reads against its current size; heat rate is fuel burned over net generation, for plants that burn fuel. A year with fewer than twelve months stated has no capacity factor, and a value outside the plausible range is left blank rather than shown. By month, the charts apply the same rules to each month's own hours and fuel.
Sources
3 sourcesSources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)