Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Mitchell (WV) Marshall County	Keystone Armstrong County
Capacity	1,632.6 MW	1,872 MW
Technology	Conventional Steam Coal	Conventional Steam Coal
Operator	Kentucky Power Co	KeyCon Operating LLC
Operating units	2	6
Latest 12-month generation	4.07 TWh	4.29 TWh
Latest complete-year capacity factor	27.6% (2025)	28.0% (2025)
National technology rank	#37 of 206	#20 of 206
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.

Compare power plants

Registry, engineering, and operating metrics shown on a consistent EIA basis.

Metric	Mitchell (WV) Marshall County	Keystone Armstrong County
Capacity	1,632.6 MW	1,872 MW
Technology	Conventional Steam Coal	Conventional Steam Coal
Operator	Kentucky Power Co	KeyCon Operating LLC
Operating units	2	6
Latest 12-month generation	4.07 TWh	4.29 TWh
Latest complete-year capacity factor	27.6% (2025)	28.0% (2025)
National technology rank	#37 of 206	#20 of 206
Latest EIA report	2026-06	2026-06

Generation comes from EIA-923. Capacity, unit counts, technology, and reporting relationships come from EIA-860. Incomplete reporting years are excluded from capacity-factor comparisons.