Oahe
Hughes County, South Dakota · EIA plant ID 3356 · Operator: USCE-Missouri River District
Nameplate786MWSummer 714 MW
Generators7in service
Net generation2,014GWh12 mo to Dec 2025
Capacity factor32%hydro units, summer MW
Heat rate—thermal plants only
First online1962
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1,620.7 | 25.9% | — |
| 2002 | 2,054.2 | 32.8% | — |
| 2003 | 1,960.3 | 33.2% | — |
| 2004 | 1,591.3 | 27.8% | — |
| 2005 | 1,350 | 24.7% | — |
| 2006 | 1,509.9 | 26.9% | — |
| 2007 | 1,074.8 | 17.9% | — |
| 2008 | 1,139.1 | 19.0% | — |
| 2009 | 1,851.2 | 29.6% | — |
| 2010 | 2,499.8 | 40.0% | — |
| 2011 | 3,329.2 | 53.2% | — |
| 2012 | 2,902.5 | 46.3% | — |
| 2013 | 1,901.3 | 30.4% | — |
| 2014 | 2,792.3 | 44.6% | — |
| 2015 | 2,324.6 | 37.2% | — |
| 2016 | 2,000.5 | 31.9% | — |
| 2017 | 2,621.9 | 41.9% | — |
| 2018 | 3,345.8 | 53.5% | — |
| 2019 | 4,185.4 | 66.9% | — |
| 2020 | 2,798 | 44.6% | — |
| 2021 | 2,409.5 | 38.5% | — |
| 2022 | 2,031.4 | 32.5% | — |
| 2023 | 2,050.2 | 32.8% | — |
| 2024 | 2,188.8 | 34.9% | — |
| 2025 | 2,013.5 | 32.2% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 112.3 | 102 | Apr 1962 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 112.3 | 102 | Dec 1962 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 112.3 | 102 | Jul 1962 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 112.3 | 102 | Oct 1962 | Operating | — | coming soon |
| 5 | Conventional Hydroelectric | HY | 112.3 | 102 | Mar 1963 | Operating | — | coming soon |
| 6 | Conventional Hydroelectric | HY | 112.3 | 102 | May 1963 | Operating | — | coming soon |
| 7 | Conventional Hydroelectric | HY | 112.3 | 102 | Jun 1963 | Operating | — | coming soon |
Owner / operator
Operator: USCE-Missouri River District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| USCE-Missouri River District | 100.0% | 786 MW |
Nearby plants
Within 80 km.
| Ft. Pierre | 6 MW | 9.2 km |
| Pierre Solar | 1 MW | 9.3 km |
| North Bend Wind Project, LLC | 200 MW | 58.3 km |
| Triple H Wind Project | 250 MW | 62.4 km |
| South Dakota Wind Energy Cente | 41 MW | 71.2 km |