Angus AnsonRetirement planned
Minnehaha County, South Dakota · EIA plant ID 7237 · Operator: Northern States Power Co - Minnesota
Nameplate406MWSummer 343 MW
Generators3in service
Net generation239GWh12 mo to Dec 2025
Capacity factor8%gas/coal/oil units, summer MW
Heat rate12,187Btu/kWhfossil units, electric fuel, HHV
First online1994Runs as peaking
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 126.9 | 6.3% | 13,969 |
| 2002 | 69.9 | 3.5% | 14,046 |
| 2003 | 100.1 | 5.3% | 13,790 |
| 2004 | 105.7 | 5.6% | 14,189 |
| 2005 | 265 | 9.5% | 13,190 |
| 2006 | 208.1 | 6.2% | 13,122 |
| 2007 | 278.1 | 8.3% | 13,028 |
| 2008 | 121.4 | 3.6% | 12,824 |
| 2009 | 15.1 | 0.4% | 16,490 |
| 2010 | 84.9 | 2.9% | 12,700 |
| 2011 | 53.8 | 1.8% | 13,283 |
| 2012 | 112.7 | 3.9% | 12,868 |
| 2013 | 40.1 | 1.4% | 13,493 |
| 2014 | 25.8 | 0.9% | 14,344 |
| 2015 | 103 | 3.6% | 12,129 |
| 2016 | 65.7 | 2.3% | 12,470 |
| 2017 | 70.1 | 2.5% | 12,101 |
| 2018 | 120.3 | 4.2% | 11,912 |
| 2019 | 109 | 3.8% | 11,841 |
| 2020 | 133.4 | 4.6% | 11,808 |
| 2021 | 159.1 | 5.6% | 11,873 |
| 2022 | 114.9 | 4.0% | 12,065 |
| 2023 | 232.3 | 8.1% | 11,616 |
| 2024 | 237.3 | 7.9% | 12,252 |
| 2025 | 238.5 | 7.9% | 12,187 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo90,539 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas180
Net summer MW on oil180
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 6 h (EIA 6H)
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 | Natural Gas Fired Combustion Turbine | GT | 119.7 | 97 | Aug 1994 | Operating · retirement planned | Dec 2040 | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 119.7 | 99 | Aug 1994 | Operating · retirement planned | Dec 2040 | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 166.3 | 147 | Jun 2005 | Operating · retirement planned | Dec 2029 | coming soon |
Owner / operator
Operator: Northern States Power Co - Minnesota. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Northern States Power Co - Minnesota | 100.0% | 406 MW |
Nearby plants
Within 80 km.
| Minwind 3-9 | retired | 20 km |
| Walleye Wind | 110 MW | 20.1 km |
| Minwind | 4 MW | 27.2 km |
| Rock County Wind Fuel, LLC | 5 MW | 30.3 km |
| Luverne | 10 MW | 35.4 km |
| Prairie Rose Wind Farm | 200 MW | 35.5 km |