Prairie IslandRetirement planned
Goodhue County, Minnesota · EIA plant ID 1925 · Operator: Northern States Power Co - Minnesota
Nameplate1,186MWSummer 1,040 MW
Generators2in service
Net generation8,838GWh12 mo to Aug 2026
Capacity factor97%nuclear units, summer MW
Heat rate—thermal plants only
First online1974Retirement planned Dec 2050
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), nuclear 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 | 7,912.7 | 86.1% | — |
| 2002 | 8,669.3 | 94.3% | — |
| 2003 | 8,837.3 | 96.6% | — |
| 2004 | 8,260.6 | 90.1% | — |
| 2005 | 8,360.3 | 91.3% | — |
| 2006 | 8,110.9 | 84.5% | — |
| 2007 | 8,910.7 | 92.8% | — |
| 2008 | 8,118.8 | 84.3% | — |
| 2009 | 8,251 | 85.9% | — |
| 2010 | 8,782.9 | 96.4% | — |
| 2011 | 8,602.2 | 94.4% | — |
| 2012 | 7,053.4 | 77.2% | — |
| 2013 | 7,714.1 | 84.7% | — |
| 2014 | 8,383.2 | 92.0% | — |
| 2015 | 7,374.7 | 81.0% | — |
| 2016 | 8,263.1 | 90.5% | — |
| 2017 | 8,744.7 | 96.0% | — |
| 2018 | 8,983.3 | 98.6% | — |
| 2019 | 9,140 | 100.3% | — |
| 2020 | 9,084 | 99.4% | — |
| 2021 | 9,099.9 | 99.9% | — |
| 2022 | 9,150.9 | 100.4% | — |
| 2023 | 7,130.2 | 78.3% | — |
| 2024 | 6,352.8 | 69.5% | — |
| 2025 | 8,557.4 | 93.9% | — |
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 | Nuclear | ST | 593.1 | 521 | Feb 1974 | Operating · retirement planned | Dec 2050 | coming soon |
| 2 | Nuclear | ST | 593.1 | 519 | Oct 1974 | Operating · retirement planned | Dec 2050 | 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% | 1,186 MW |
Nearby plants
Within 80 km.
| Tinta Wita 5 MW Solar PV System | 5 MW | 1.4 km |
| Trimbelle (Pierce Pepin) | 2 MW | 4.6 km |
| Foreman's Hill Community Solar | 5 MW | 7.6 km |
| Lady Slipper Solar Array CSG | 5 MW | 7.8 km |
| Red Wing | 23 MW | 10.9 km |
| Huneke I CSG | 1 MW | 12 km |