ExxonMobil Mobile Bay Onshore
Mobile County, Alabama · EIA plant ID 54550 · Operator: W&T Offshore Inc
Nameplate12MWSummer 11 MW
Generators4in service
Net generation52GWh12 mo to Dec 2025
Capacity factor54%gas/coal/oil units, summer MW
Heat rate4,642Btu/kWhfossil units, electric fuel, HHV
First online1993Runs as baseload
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 | 66.8 | — | — |
| 2002 | 66.7 | — | — |
| 2003 | 71.4 | 73.5% | 11,765 |
| 2004 | 65.6 | 67.3% | 10,793 |
| 2005 | 51.9 | 53.4% | 11,765 |
| 2006 | 39.4 | 40.5% | 11,765 |
| 2007 | 46.3 | 47.6% | 11,765 |
| 2008 | 56.1 | 57.5% | 11,765 |
| 2009 | 49.8 | 51.3% | 11,765 |
| 2010 | 49.9 | 51.3% | 11,765 |
| 2011 | 55.3 | 56.9% | 11,765 |
| 2012 | 56.6 | 58.1% | 11,765 |
| 2013 | 65.9 | 67.8% | 11,739 |
| 2014 | 71.7 | 73.8% | 12,482 |
| 2015 | 84 | 83.4% | 11,570 |
| 2016 | 83.3 | 82.5% | 4,664 |
| 2017 | 88.8 | 91.3% | 4,658 |
| 2018 | 88 | 90.5% | 4,643 |
| 2019 | 72.8 | 74.8% | 4,642 |
| 2020 | 63.2 | 64.8% | 4,642 |
| 2021 | 63.1 | 64.9% | 4,642 |
| 2022 | 57.3 | 58.9% | 4,642 |
| 2023 | 47.6 | 49.0% | 4,642 |
| 2024 | 54.6 | 56.0% | 4,642 |
| 2025 | 52.3 | 53.8% | 4,642 |
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 |
|---|---|---|---|---|---|---|---|---|
| 901 | Natural Gas Fired Combined Cycle | CA | 0.9 | 0.9 | Dec 1993 | Operating | — | coming soon |
| 901A | Natural Gas Fired Combined Cycle | CT | 3.7 | 3.4 | Sep 1993 | Operating | — | coming soon |
| 901B | Natural Gas Fired Combined Cycle | CT | 3.7 | 3.4 | Sep 1993 | Operating | — | coming soon |
| 901C | Natural Gas Fired Combined Cycle | CT | 3.7 | 3.4 | Sep 1993 | Operating | — | coming soon |
Owner / operator
Operator: W&T Offshore Inc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| W&T Offshore Inc | 100.0% | 12 MW |
Nearby plants
Within 80 km.
| Shell Offshore Yellowhammer | retired | 6.1 km |
| Theodore Cogen Facility | 317 MW | 11.6 km |
| Chevron Oil | 171 MW | 31.4 km |
| Kimberly Clark Mobile - CHP Plant | 50 MW | 36.3 km |
| Hog Bayou Energy Center | 280 MW | 37.1 km |
| Victor J Daniel Jr | 2,229 MW | 37.4 km |