Allen S KingRetirement planned
Washington County, Minnesota · EIA plant ID 1915 · Operator: Northern States Power Co - Minnesota
Nameplate598MWSummer 511 MW
Generators1in service
Net generation846GWh12 mo to Aug 2026
Capacity factor19%gas/coal/oil units, summer MW
Heat rate10,496Btu/kWhfossil units, electric fuel, HHV
First online1958Runs as peaking
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), 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 | 3,227.8 | 64.5% | 9,939 |
| 2002 | 3,312 | 66.2% | 9,803 |
| 2003 | 3,431.7 | 68.4% | 9,841 |
| 2004 | 3,086 | 61.3% | 9,894 |
| 2005 | 2,796.6 | 60.5% | 10,064 |
| 2006 | 1,665.9 | 36.0% | 10,215 |
| 2007 | 729.9 | 15.1% | 10,609 |
| 2008 | 3,174.4 | 65.1% | 9,836 |
| 2009 | 3,450.7 | 77.2% | 9,722 |
| 2010 | 3,490.1 | 78.1% | 9,693 |
| 2011 | 3,423.9 | 76.5% | 9,572 |
| 2012 | 3,364.3 | 75.0% | 9,555 |
| 2013 | 2,528.9 | 56.5% | 9,837 |
| 2014 | 2,992.9 | 66.9% | 9,812 |
| 2015 | 3,030 | 67.7% | 9,660 |
| 2016 | 2,715.6 | 60.5% | 9,847 |
| 2017 | 2,913.3 | 65.1% | 9,902 |
| 2018 | 2,698.7 | 60.3% | 9,809 |
| 2019 | 1,739.2 | 38.9% | 10,267 |
| 2020 | 761.3 | 17.0% | 11,052 |
| 2021 | 1,297.9 | 29.0% | 10,417 |
| 2022 | 1,171.1 | 26.2% | 10,368 |
| 2023 | 928.4 | 20.7% | 10,437 |
| 2024 | 543.9 | 12.1% | 10,869 |
| 2025 | 889.8 | 19.9% | 10,577 |
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 Steam Coal | ST | 598.4 | 511 | Mar 1958 | Operating · retirement planned | Dec 2028 | 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% | 598 MW |
Nearby plants
Within 80 km.
| Novel MNDot Solar CSG | 1 MW | 9.6 km |
| MN CSG 2019-24 LLC | 1 MW | 11.5 km |
| SV CSG AFTON I | 1 MW | 11.5 km |
| Apple River | 2 MW | 15 km |
| CGSun, LLC Community Solar | 4 MW | 21.6 km |
| Warren DPC Solar | 2 MW | 21.9 km |