Midlothian Energy Facility
Ellis County, Texas · EIA plant ID 55091 · Operator: Midlothian Energy LLC
Nameplate1,734MWSummer 1,620 MW
Generators6in service
Net generation7,412GWh12 mo to Aug 2026
Capacity factor52%gas/coal/oil units, summer MW
Heat rate7,302Btu/kWhfossil units, electric fuel, HHV
First online2000Runs 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 | 4,081.4 | 54.2% | 7,256 |
| 2002 | 5,966.8 | 50.2% | 7,483 |
| 2003 | 4,399.1 | 38.0% | 7,574 |
| 2004 | 3,611.4 | 31.1% | 7,565 |
| 2005 | 6,712.6 | 59.4% | 7,499 |
| 2006 | 7,057.2 | 63.0% | 7,472 |
| 2007 | 6,695.5 | 59.8% | 7,492 |
| 2008 | 5,146.7 | 45.9% | 7,660 |
| 2009 | 3,716.6 | 33.2% | 7,701 |
| 2010 | 3,012.3 | 26.9% | 7,773 |
| 2011 | 4,118.3 | 36.8% | 7,694 |
| 2012 | 4,930.2 | 42.7% | 7,656 |
| 2013 | 5,467.5 | 43.2% | 7,707 |
| 2014 | 5,518.3 | 43.1% | 7,792 |
| 2015 | 5,673.8 | 43.7% | 7,744 |
| 2016 | 5,875.6 | 45.1% | 7,720 |
| 2017 | 3,239.7 | 24.8% | 7,781 |
| 2018 | 5,539.3 | 39.5% | 7,667 |
| 2019 | 5,536.8 | 39.5% | 7,655 |
| 2020 | 3,904.7 | 28.5% | 7,728 |
| 2021 | 4,070.8 | 29.2% | 7,632 |
| 2022 | 4,884.7 | 34.7% | 7,592 |
| 2023 | 5,230 | 37.2% | 7,533 |
| 2024 | 6,338.7 | 44.5% | 7,336 |
| 2025 | 6,947.9 | 49.0% | 7,265 |
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 |
|---|---|---|---|---|---|---|---|---|
| STK1 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | May 2000 | Operating | — | coming soon |
| STK2 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | May 2000 | Operating | — | coming soon |
| STK3 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | Jul 2000 | Operating | — | coming soon |
| STK4 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | Sep 2000 | Operating | — | coming soon |
| STK5 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | Aug 2001 | Operating | — | coming soon |
| STK6 | Natural Gas Fired Combined Cycle | CS | 289 | 270 | Sep 2001 | Operating | — | coming soon |
Owner / operator
Operator: Midlothian Energy LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Midlothian Energy LLC | 100.0% | 1,734 MW |
Nearby plants
Within 80 km.
| Desert Willow Energy Storage | 150 MW | 3 km |
| HEB00750 | 1 MW | 16.3 km |
| WAL284 | 1 MW | 17.7 km |
| WAL3285 | 1 MW | 21.1 km |
| Cedar Hill ESS | — | 23.6 km |
| WAL3432 | 1 MW | 24.4 km |