Whillock
Conway County, Arkansas · EIA plant ID 7135 · Operator: Arkansas Electric Coop Corp
Nameplate32MWSummer 17 MW
Generators3in service
Net generation131GWh12 mo to Dec 2025
Capacity factor88%hydro units, summer MW
Heat rate—thermal plants only
First online1993
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 | 124.9 | 83.9% | — |
| 2002 | 129.6 | 87.0% | — |
| 2003 | 159.1 | 106.8% | — |
| 2004 | 144.7 | 96.9% | — |
| 2005 | 137.6 | 92.4% | — |
| 2006 | 166.6 | 111.9% | — |
| 2007 | 120 | 80.6% | — |
| 2008 | 104 | 69.7% | — |
| 2009 | 148.3 | 99.6% | — |
| 2010 | 148.9 | 100.0% | — |
| 2011 | 111.8 | 75.1% | — |
| 2012 | 85.3 | 57.1% | — |
| 2013 | 144.9 | 97.3% | — |
| 2014 | 153.7 | 103.2% | — |
| 2015 | 102.5 | 68.8% | — |
| 2016 | 169.7 | 113.6% | — |
| 2017 | 121.7 | 81.8% | — |
| 2018 | 162.8 | 109.3% | — |
| 2019 | 122 | 82.0% | — |
| 2020 | 131.4 | 88.0% | — |
| 2021 | 132.3 | 88.8% | — |
| 2022 | 103.7 | 69.6% | — |
| 2023 | 135.3 | 90.8% | — |
| 2024 | 139.3 | 93.3% | — |
| 2025 | 130.9 | 87.9% | — |
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 | 10.8 | 6 | Oct 1993 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 10.8 | 6 | Oct 1993 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 10.8 | 5 | Oct 1993 | Operating | — | coming soon |
Owner / operator
Operator: Arkansas Electric Coop Corp. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Arkansas Electric Coop Corp | 100.0% | 32 MW |
Nearby plants
Within 80 km.
| Dardanelle | 161 MW | 37 km |
| Arkansas Nuclear One | 1,845 MW | 45.3 km |
| Murray | 45 MW | 54.1 km |
| Petit Jean | 1 MW | 57.5 km |
| FECC Solar Benton | retired | 57.7 km |
| Two Pine Landfill Gas Recovery | 5 MW | 66.3 km |