Appalachian Power Company · Mason County · PJM
Mountaineer is a coal-fired power facility with 1,300 MW of EIA-reported operating capacity in Mason County, West Virginia, registered as EIA Plant ID 6264. Appalachian Power Co owns and operates the plant. The demonstration was installed at Mountaineer's single 1,300-MWe coal-fired generating unit. Commercial operation began in 1980.
Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Primary generation technology.
Appalachian Power Co · Mason County · PJM
Mountaineer is currently operating; a closure or retirement is listed for August 2, 2026.
Best-supported operating milestone.
Conventional Steam Coal
Mountaineer is currently operating; a closure or retirement is listed for August 2, 2026.
Mountaineer is currently operating; a closure or retirement is listed for August 2, 2026.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 1,300 MW 1,299 MW summer | Conventional Steam Coal Bituminous Coal · ST | Sep 1980 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
The regulatory project description records Mountaineer beginning commercial operation in 1980 as a nominally rated 1,300-MWe pulverized-coal generating unit. A plant-level construction start date is not stated in the cited records.
PJM
PJM · Mason County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| John E Amos | 2,932.6 MW | WV | |
| MountaineerCurrent | 1,300 MW | WV | |
| Dresden Energy Facility | 678.3 MW | OH | |
| Smith Mountain | 547.5 MW | VA | |
| Ceredo Generating Station | 519 MW | WV | |
| Clinch River | 475 MW | VA | |
| Top Hat Wind | 204 MW | IL | |
| Claytor | 74.8 MW | VA |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator 1 with this operating date.
AEP and Alstom formally commissioned a chilled-ammonia carbon-capture and storage demonstration at Mountaineer; the pilot was designed to capture and store approximately 100,000 tonnes of CO2 annually.
DOE's Mountaineer CCS II proposal contemplated a 235-MWe flue-gas slipstream system capturing approximately 1.5 million metric tonnes of CO2 annually. DOE proposed up to $334 million in cost-shared assistance, approximately half of estimated development cost.
AEP notified DOE that it intended to terminate the CCS II cooperative agreement at the end of Phase I, citing unfavorable economic conditions and regulatory uncertainty.
DOE published notice cancelling the environmental impact statement for the proposed Mountaineer commercial-scale CCS project after AEP's Phase I termination decision.
DOE announced that Appalachian Power would upgrade the Mountaineer Power Plant in Letart, West Virginia, as part of a broader program for coal-plant modernization. The announcement does not establish completion or repowering.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Mountaineer has a reported capacity of 1,300 MW. Source: EIA Form 860.
Mountaineer is a Conventional Steam Coal facility in Mason County, WV, participating in the PJM market.
Mountaineer is in Mason County, WV, inside the PJM balancing area.
Mountaineer is operated by Appalachian Power Co according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Mountaineer reports a commercial operation date of 1980. Current status: operating. Source: EIA Form 860.
Mountaineer reported 6,667 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.
Mountaineer on the Appalachian Power Company system.
By capacity, Mountaineer ranks #57 of 206 operating plants of the same technology nationally. It ranks #6 of 9 in WV.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
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