Compare power plants

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

Metric	Rockport Spencer County	John E Amos Putnam County
Capacity	2,600 MW	2,932.6 MW
Technology	Conventional Steam Coal	Conventional Steam Coal
Operator	Indiana Michigan Power Co	Appalachian Power Co
Operating units	2	3
Latest 12-month generation	9.22 TWh	8.73 TWh
Latest complete-year capacity factor	42.3% (2025)	35.3% (2025)
National technology rank	#8 of 206	#4 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	Rockport Spencer County	John E Amos Putnam County
Capacity	2,600 MW	2,932.6 MW
Technology	Conventional Steam Coal	Conventional Steam Coal
Operator	Indiana Michigan Power Co	Appalachian Power Co
Operating units	2	3
Latest 12-month generation	9.22 TWh	8.73 TWh
Latest complete-year capacity factor	42.3% (2025)	35.3% (2025)
National technology rank	#8 of 206	#4 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.