Monticello Nuclear FacilityRetirement planned
Wright County, Minnesota · EIA plant ID 1922 · Operator: Northern States Power Co - Minnesota
Nameplate685MWSummer 617 MW
Generators1in service
Net generation4,520GWh12 mo to Aug 2026
Capacity factor84%nuclear units, summer MW
Heat rate—thermal plants only
First online1971Retirement 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 | 3,876.3 | 74.1% | — |
| 2002 | 5,015.6 | 95.9% | — |
| 2003 | 4,576.5 | 91.8% | — |
| 2004 | 5,034.9 | 100.7% | — |
| 2005 | 4,474.9 | 89.3% | — |
| 2006 | 5,072.6 | 101.2% | — |
| 2007 | 4,192.3 | 83.7% | — |
| 2008 | 4,878 | 97.1% | — |
| 2009 | 4,142.5 | 82.7% | — |
| 2010 | 4,695.1 | 96.8% | — |
| 2011 | 3,356.3 | 69.2% | — |
| 2012 | 4,890.4 | 100.5% | — |
| 2013 | 2,993.6 | 54.0% | — |
| 2014 | 4,324 | 89.1% | — |
| 2015 | 4,663.9 | 87.7% | — |
| 2016 | 5,597.8 | 103.3% | — |
| 2017 | 5,159.6 | 95.5% | — |
| 2018 | 5,618 | 103.9% | — |
| 2019 | 4,964.6 | 91.8% | — |
| 2020 | 5,593.3 | 103.2% | — |
| 2021 | 5,022.9 | 92.9% | — |
| 2022 | 5,545.3 | 102.6% | — |
| 2023 | 4,793.5 | 88.7% | — |
| 2024 | 5,491.8 | 101.3% | — |
| 2025 | 4,655.9 | 86.1% | — |
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 | 685 | 617 | Jun 1971 | 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% | 685 MW |
Nearby plants
Within 80 km.
| Sherco Solar II | 237 MW | 4.4 km |
| Big Lake Project CSG | 5 MW | 4.5 km |
| Big Lake Holdco Solar CSG | 5 MW | 5.8 km |
| Sherco BESS | — | 5.8 km |
| Sherco LDES | — | 5.9 km |
| Sherburne County | 1,704 MW | 6.2 km |