TregoRetirement planned
Washburn County, Wisconsin · EIA plant ID 4012 · Operator: Northern States Power Co - Minnesota
Nameplate1MWSummer 1 MW
Generators2in service
Net generation5GWh12 mo to Dec 2025
Capacity factor84%hydro units, summer MW
Heat rate—thermal plants only
First online1927Retirement planned Dec 2065
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), hydro 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 | 7.9 | 69.5% | — |
| 2002 | 5.9 | 51.4% | — |
| 2003 | 7.6 | 66.7% | — |
| 2004 | 7.8 | 68.6% | — |
| 2005 | 6.5 | 50.1% | — |
| 2006 | 5.9 | 45.3% | — |
| 2007 | 6.1 | 46.1% | — |
| 2008 | 7.4 | 56.2% | — |
| 2009 | 5.4 | 41.4% | — |
| 2010 | 6.6 | 50.0% | — |
| 2011 | 7.5 | 123.1% | — |
| 2012 | 6.6 | 107.4% | — |
| 2013 | 7.1 | 115.9% | — |
| 2014 | 8.8 | 144.2% | — |
| 2015 | 8.5 | 138.4% | — |
| 2016 | 9.9 | 160.5% | — |
| 2017 | 9.9 | 162.1% | — |
| 2018 | 9.4 | 152.5% | — |
| 2019 | 9.8 | 159.8% | — |
| 2020 | 9.3 | 150.8% | — |
| 2021 | 7.7 | 125.9% | — |
| 2022 | 7.2 | 117.4% | — |
| 2023 | 7.3 | 119.4% | — |
| 2024 | 6.5 | 106.3% | — |
| 2025 | 5.1 | 83.9% | — |
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 | Conventional Hydroelectric | HY | 0.7 | 0.4 | Jan 1927 | Operating · retirement planned | Dec 2065 | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.5 | 0.3 | Jan 1927 | Operating · retirement planned | Dec 2065 | 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 MW |
Nearby plants
Within 80 km.
| Spooner Solar Array | 2 MW | 3.8 km |
| Spooner | — | 11.5 km |
| Viola | 3 MW | 32.1 km |
| Gordon | 7 MW | 33.1 km |
| Danbury Diesel | retired | 37.8 km |
| Danbury Dam | 1 MW | 37.9 km |