Axiall Natrium Plant
Marshall County, West Virginia · EIA plant ID 50491 · Operator: Westlake Chemical Natrium Plant
Nameplate116MWSummer 116 MW
Generators3in service
Net generation594GWh12 mo to Aug 2026
Capacity factor64%gas/coal/oil units, summer MW
Heat rate4,122Btu/kWhfossil units, electric fuel, HHV
First online1943Runs 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 | 622.3 | 57.8% | 8,494 |
| 2002 | 775.1 | 71.9% | 9,241 |
| 2003 | 717 | 66.5% | 8,247 |
| 2004 | 682.1 | 63.1% | 5,699 |
| 2005 | 554.2 | 51.4% | 5,699 |
| 2006 | 545.4 | 50.6% | 5,699 |
| 2007 | 497.9 | 46.2% | 5,699 |
| 2008 | 451.7 | 41.8% | 5,733 |
| 2009 | 329.5 | 30.6% | 5,699 |
| 2010 | 412.9 | 38.3% | 5,699 |
| 2011 | 436.6 | 40.5% | 5,675 |
| 2012 | 413.7 | 38.3% | 5,699 |
| 2013 | 452.4 | 42.0% | 5,699 |
| 2014 | 586.3 | 54.4% | 5,699 |
| 2015 | 556.1 | 51.6% | 5,699 |
| 2016 | 381.3 | 35.3% | 4,281 |
| 2017 | 543 | 50.4% | 4,281 |
| 2018 | 377.2 | 35.7% | 4,281 |
| 2019 | 682.9 | 67.5% | 4,281 |
| 2020 | 719.5 | 70.9% | 4,281 |
| 2021 | 752.6 | 74.4% | 4,281 |
| 2022 | 513.8 | 50.8% | 4,281 |
| 2023 | 667.4 | 66.0% | 4,281 |
| 2024 | 712.7 | 70.3% | 4,281 |
| 2025 | 617.3 | 61.0% | 4,226 |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN4 | Natural Gas Steam Turbine | ST | 7.5 | 7.5 | Jan 1943 | Operating (Out of service) | — | coming soon |
| GEN6 | Natural Gas Steam Turbine | ST | 26 | 26 | Jan 1954 | Operating | — | coming soon |
| GEN7 | Natural Gas Steam Turbine | ST | 82 | 82 | Jan 1966 | Operating | — | coming soon |
| GEN3 | Natural Gas Steam Turbine | ST | 7.5 | 7.5 | Jan 1943 | Retired Sep 2018 | — | coming soon |
Owner / operator
Operator: Westlake Chemical Natrium Plant. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Westlake Chemical Natrium Plant | 100.0% | 116 MW |
Nearby plants
Within 80 km.
| Long Ridge Energy Generation | 522 MW | 5.4 km |
| New Martinsville Hannibal Hydro | 37 MW | 9 km |
| Mitchell (WV) | 1,633 MW | 9.7 km |
| Anadarko | 8 MW | 22.3 km |
| Pike Island Hydroelectric Project | — | 46.6 km |
| FirstEnergy Pleasants Power Station | 1,368 MW | 56.7 km |