Storm Lake II
Buena Vista County, Iowa · EIA plant ID 55287 · Operator: Allete Clean Energy
Nameplate80MWSummer 77 MW
Generators1in service
Net generation115GWh12 mo to Dec 2025
Capacity factor17%wind units, summer MW
Heat rate—thermal plants only
First online1999
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) |
|---|---|---|---|
| 2001 | 195.5 | 27.8% | — |
| 2002 | 244.2 | 34.8% | — |
| 2003 | 192.5 | 27.4% | — |
| 2004 | 180.3 | 25.6% | — |
| 2005 | 193.2 | 27.5% | — |
| 2006 | 204.6 | 29.1% | — |
| 2007 | 201.2 | 28.6% | — |
| 2008 | 161.2 | 22.9% | — |
| 2009 | 158.3 | 22.5% | — |
| 2010 | 166.1 | 23.6% | — |
| 2011 | 188.6 | 26.9% | — |
| 2012 | 196 | 27.8% | — |
| 2013 | 192.9 | 27.5% | — |
| 2014 | 192.6 | 27.4% | — |
| 2015 | 185.9 | 27.7% | — |
| 2016 | 154.3 | 23.0% | — |
| 2017 | 152.1 | 22.7% | — |
| 2018 | 134.3 | 20.0% | — |
| 2019 | 136.7 | 20.4% | — |
| 2020 | 151.3 | 22.5% | — |
| 2021 | 153.8 | 22.9% | — |
| 2022 | 160.5 | 23.9% | — |
| 2023 | 125.6 | 18.8% | — |
| 2024 | 114.2 | 17.0% | — |
| 2025 | 114.6 | 17.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| EXIS | Onshore Wind Turbine | WT | 80.2 | 76.5 | Apr 1999 | Operating | — | zond Z-50 |
Owner / operator
Operator: Allete Clean Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Allete Clean Energy | 100.0% | 80 MW |
Nearby plants
Within 80 km.
| Storm Lake 1 | 114 MW | 17.1 km |
| Alta Municipal Utilities | 4 MW | 20.5 km |
| Glaciers Edge Wind Project | 212 MW | 30 km |
| Intrepid | 176 MW | 32.6 km |
| Primghar | 2 MW | 32.7 km |
| Highland Wind Project (IA) | 502 MW | 33.5 km |