WilmarthRetirement planned
Blue Earth County, Minnesota · EIA plant ID 1934 · Operator: Northern States Power Co - Minnesota
Nameplate25MWSummer 18 MW
Generators2in service
Net generation104GWh12 mo to Aug 2026
Capacity factor64%other units, summer MW
Heat rate19,285Btu/kWhfossil units, electric fuel, HHV
First online1948Retirement planned Dec 2037
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), other 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 | 120.9 | 65.0% | 19,697 |
| 2002 | 131.2 | 70.2% | 17,334 |
| 2003 | 123.5 | 68.6% | 18,295 |
| 2004 | 106.9 | 58.6% | 19,778 |
| 2005 | 105.4 | 64.0% | 19,434 |
| 2006 | 111.7 | 67.5% | 16,055 |
| 2007 | 113.8 | 69.3% | 19,607 |
| 2008 | 97 | 58.6% | 20,630 |
| 2009 | 94.8 | 57.6% | 21,699 |
| 2010 | 89.2 | 55.2% | 19,609 |
| 2011 | 104.6 | 65.4% | 19,430 |
| 2012 | 103.4 | 64.1% | 18,801 |
| 2013 | 105.5 | 65.8% | 22,483 |
| 2014 | 106.9 | 66.8% | 21,716 |
| 2015 | 110.1 | 68.9% | 21,178 |
| 2016 | 102.7 | 64.0% | 21,251 |
| 2017 | 87.7 | 54.7% | 22,201 |
| 2018 | 100.1 | 62.1% | 20,759 |
| 2019 | 107.3 | 66.7% | 20,889 |
| 2020 | 113.9 | 70.6% | 19,058 |
| 2021 | 96.2 | 59.3% | 16,385 |
| 2022 | 96.5 | 59.8% | 20,813 |
| 2023 | 97 | 60.4% | 19,706 |
| 2024 | 105.8 | 66.0% | 18,028 |
| 2025 | 98.2 | 61.2% | 17,983 |
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 | Municipal Solid Waste | ST | 12.5 | 9 | Sep 1948 | Operating · retirement planned | Dec 2037 | coming soon |
| 2 | Municipal Solid Waste | ST | 12.5 | 9 | Mar 1951 | Operating · retirement planned | Dec 2037 | 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% | 25 MW |
Nearby plants
Within 80 km.
| Mankato Energy Center | 741 MW | 0.3 km |
| Archer Daniels Midland Mankato | 6 MW | 1.3 km |
| Primrose Solar, LLC | 1 MW | 2 km |
| School Sisters CSG | 1 MW | 3.2 km |
| MN CSG 2019-57 | — | 3.5 km |
| MN CSG 2019-16 LLC | 1 MW | 3.8 km |