J Lamar Stall Unit
Caddo County, Louisiana · EIA plant ID 56565 · Operator: Southwestern Electric Power Co
Nameplate624MWSummer 511 MW
Generators3in service
Net generation3,271GWh12 mo to Aug 2026
Capacity factor73%gas/coal/oil units, summer MW
Heat rate7,214Btu/kWhfossil units, electric fuel, HHV
First online2010Runs 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) |
|---|---|---|---|
| 2010 | 1,358.6 | 52.2% | 7,083 |
| 2011 | 3,001.2 | 67.6% | 7,140 |
| 2012 | 3,553 | 79.8% | 7,047 |
| 2013 | 2,924.6 | 65.8% | 7,203 |
| 2014 | 3,302.6 | 74.4% | 7,200 |
| 2015 | 3,588.7 | 80.8% | 7,103 |
| 2016 | 3,559.3 | 79.9% | 7,137 |
| 2017 | 2,885.5 | 65.0% | 7,279 |
| 2018 | 2,677.1 | 60.3% | 7,255 |
| 2019 | 2,529.5 | 57.0% | 7,192 |
| 2020 | 3,473.4 | 77.4% | 7,181 |
| 2021 | 2,768.7 | 61.9% | 7,387 |
| 2022 | 3,121.6 | 69.7% | 7,170 |
| 2023 | 3,452.8 | 77.1% | 7,329 |
| 2024 | 3,348.7 | 74.6% | 7,093 |
| 2025 | 3,330.9 | 74.4% | 7,503 |
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 |
|---|---|---|---|---|---|---|---|---|
| 6A | Natural Gas Fired Combined Cycle | CT | 184 | 159 | Jun 2010 | Operating | — | coming soon |
| 6B | Natural Gas Fired Combined Cycle | CT | 184 | 163 | Jun 2010 | Operating | — | coming soon |
| 6STG | Natural Gas Fired Combined Cycle | CA | 256 | 189 | Jun 2010 | Operating | — | coming soon |
| 6A/B | — | CT | — | — | — | not_current | — | coming soon |
Owner / operator
Operator: Southwestern Electric Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Southwestern Electric Power Co | 100.0% | 624 MW |
Nearby plants
Within 80 km.
| Arsenal Hill | 125 MW | 0.2 km |
| Lieberman | 228 MW | 27.8 km |
| Rocking R Solar, LLC | 73 MW | 42.1 km |
| Mansfield Mill | 172 MW | 44.6 km |
| Dolet Hills | retired | 57.3 km |
| Snider Industries | 5 MW | 57.9 km |