Alsey
Scott County, Illinois · EIA plant ID 7818 · Operator: Prairie Power, Inc
Nameplate173MWSummer 164 MW
Generators6in service
Net generation35GWh12 mo to Dec 2025
Capacity factor2%gas/coal/oil units, summer MW
Heat rate11,797Btu/kWhfossil units, electric fuel, HHV
First online1999Runs as peaking
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 18.6 | 1.7% | 15,490 |
| 2002 | 1.4 | 0.2% | 15,209 |
| 2003 | 1.1 | 0.1% | 15,463 |
| 2004 | 1.1 | 0.1% | 19,935 |
| 2005 | 2.2 | 0.2% | 14,573 |
| 2006 | 4.9 | 0.5% | 14,930 |
| 2007 | 1.5 | 0.1% | 15,504 |
| 2008 | 0 | 0.0% | 12,917 |
| 2009 | 1.1 | 0.1% | 15,127 |
| 2010 | 5 | 0.5% | 14,611 |
| 2011 | 4.4 | 0.4% | 14,493 |
| 2012 | 8.8 | 0.8% | 15,466 |
| 2013 | 4.2 | 0.4% | 15,149 |
| 2014 | 2.4 | 0.2% | 16,125 |
| 2015 | 10.3 | 1.0% | 16,429 |
| 2016 | 7.7 | 0.7% | 17,621 |
| 2017 | 16.1 | 1.1% | 10,297 |
| 2018 | 21.1 | 1.5% | 11,340 |
| 2019 | 15 | 1.0% | 11,807 |
| 2020 | 29.8 | 2.1% | 12,014 |
| 2021 | 55.7 | 3.9% | 11,256 |
| 2022 | 77 | 5.3% | — |
| 2023 | 20.1 | 1.4% | 11,426 |
| 2024 | 38.7 | 2.7% | 11,756 |
| 2025 | 34.7 | 2.4% | 11,797 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo947 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas79
Net summer MW on oil79
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 | Natural Gas Fired Combustion Turbine | GT | 30 | 30 | Jun 1999 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combustion Turbine | GT | 30 | 30 | Aug 1999 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combustion Turbine | GT | 20 | 19.3 | Jul 1999 | Operating | — | coming soon |
| 4 | Natural Gas Fired Combustion Turbine | GT | 20 | 18 | Aug 1999 | Operating | — | coming soon |
| 5 | Natural Gas Fired Combustion Turbine | GT | 25 | 25 | Jun 1999 | Operating | — | coming soon |
| 6 | Natural Gas Fired Combustion Turbine | GT | 48 | 42 | Dec 2016 | Operating | — | coming soon |
Owner / operator
Operator: Prairie Power, Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Prairie Power, Inc | 100.0% | 173 MW |
Nearby plants
Within 80 km.
| Morgan Solar 2, LLC CSG | 2 MW | 18.4 km |
| Morgan Solar 4, LLC CSG | 2 MW | 19.1 km |
| Pearl Station | 24 MW | 20.3 km |
| Peony | 5 MW | 23.1 km |
| Wolf Run Solar | 140 MW | 25.6 km |
| Greenfield Solar 1 (IL) | — | 28 km |