Jeffers Wind 20 LLC
Cottonwood County, Minnesota · EIA plant ID 56750 · Operator: Northern States Power Co - Minnesota
Nameplate50MWSummer 50 MW
Generators1in service
Net generation196GWh12 mo to Dec 2025
Capacity factor45%wind units, summer MW
Heat rate—thermal plants only
First online2008
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), wind 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) |
|---|---|---|---|
| 2008 | 69.2 | 62.6% | — |
| 2009 | 148.1 | 33.8% | — |
| 2010 | 151.7 | 34.6% | — |
| 2011 | 163 | 37.2% | — |
| 2012 | 172.4 | 39.3% | — |
| 2013 | 160.7 | 36.7% | — |
| 2014 | 174.7 | 39.9% | — |
| 2015 | 173.2 | 39.6% | — |
| 2016 | 171.2 | 39.0% | — |
| 2017 | 163.3 | 37.3% | — |
| 2018 | 12.6 | 2.9% | — |
| 2019 | 154.1 | 35.2% | — |
| 2020 | 99.4 | 22.6% | — |
| 2021 | 173.3 | 39.6% | — |
| 2022 | 209.3 | 47.8% | — |
| 2023 | 192 | 43.8% | — |
| 2024 | 195.4 | 51.6% | — |
| 2025 | 196.5 | 44.9% | — |
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 | Onshore Wind Turbine | WT | 50 | 50 | Oct 2008 | Operating | — | clipper Liberty C96 |
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).
| NRG Energy, Inc | 99.9% | 50 MW |
| Cottonwood J20 Holdings, LLC | 0.1% | 0 MW |
Nearby plants
Within 80 km.
| Plum Creek | — | 14.2 km |
| Windom Wind Project | 16 MW | 14.8 km |
| Westbrook | 2 MW | 15.3 km |
| Windom | 12 MW | 23.8 km |
| Mountain Lake | 1 MW | 28 km |
| Springfield (MN) | 9 MW | 29.9 km |