Attala
Attala County, Mississippi · EIA plant ID 55220 · Operator: Entergy Mississippi Inc
Nameplate551MWSummer 459 MW
Generators3in service
Net generation2,992GWh12 mo to Aug 2026
Capacity factor74%gas/coal/oil units, summer MW
Heat rate6,966Btu/kWhfossil units, electric fuel, HHV
First online2001Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 1,439.6 | — | — |
| 2002 | 1,365.7 | — | — |
| 2003 | 314.3 | 7.8% | 9,520 |
| 2004 | 696.5 | 17.3% | 7,137 |
| 2005 | 2,595.3 | 64.5% | 7,023 |
| 2006 | 2,001 | 49.3% | 7,134 |
| 2007 | 2,527.5 | 63.4% | 6,913 |
| 2008 | 2,234.4 | 55.9% | 7,234 |
| 2009 | 1,621 | 40.7% | 7,447 |
| 2010 | 1,870.1 | 46.9% | 7,359 |
| 2011 | 1,526 | 38.3% | 7,392 |
| 2012 | 1,931.4 | 48.3% | 7,283 |
| 2013 | 2,193.5 | 55.0% | 7,283 |
| 2014 | 3,232.7 | 80.7% | 7,166 |
| 2015 | 3,297.7 | 83.1% | 7,104 |
| 2016 | 3,059.9 | 76.2% | 7,079 |
| 2017 | 2,295.3 | 57.8% | 7,165 |
| 2018 | 2,204.2 | 55.3% | 7,221 |
| 2019 | 1,658.9 | 42.0% | 7,052 |
| 2020 | 1,963 | 48.6% | 7,094 |
| 2021 | 2,492.5 | 62.0% | 7,058 |
| 2022 | 3,346.4 | 83.8% | 7,083 |
| 2023 | 2,944 | 73.8% | 6,470 |
| 2024 | 2,956.9 | 73.3% | 6,467 |
| 2025 | 2,221.5 | 55.3% | 6,809 |
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 |
|---|---|---|---|---|---|---|---|---|
| A01 | Natural Gas Fired Combined Cycle | CT | 176.6 | — | Mar 2001 | Operating | — | coming soon |
| A02 | Natural Gas Fired Combined Cycle | CT | 176.6 | — | Mar 2001 | Operating | — | coming soon |
| A03 | Natural Gas Fired Combined Cycle | CA | 198.1 | 458.7 | Mar 2001 | Operating | — | coming soon |
Owner / operator
Operator: Entergy Mississippi Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Entergy Mississippi Inc | 100.0% | 551 MW |
Nearby plants
Within 80 km.
| Choctaw County | 899 MW | 38.6 km |
| Pearl River Solar Park LLC | 175 MW | 51.8 km |
| Walnut Grove Demonstration Plant | 3 MW | 52.6 km |
| Red Hills Generating Facility | 514 MW | 58.5 km |
| Quantum Choctaw Power LLC | 851 MW | 59.4 km |
| Ragsdale Solar LLC | 100 MW | 60.3 km |