ROCKPORT

Operating

Coal power plant

Capacity: 2,600 MW
Primary fuel: Coal
County: Spencer County
Operator: INDIANA MICHIGAN POWER CO
Status: Operating
Commissioned: 1984
EIA plant ID: 6166
Generators: 2
Technology: Conventional Steam Coal
Net generation (2024): 5,061 GWh
Capacity factor (2024, EIA nameplate): 22%
Data vintage: EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates: 37.9257, -87.0341

ROCKPORT, a 2,600 MW Coal power plant in Spencer County, Indiana. Operated by INDIANA MICHIGAN POWER CO, commissioned 1984.

How ROCKPORT compares

With 2,600 MW of capacity, ROCKPORT ranks 2nd among the 77 operating power plants Bywatts maps in Indiana and 2nd of the 19 operating Coal plants in the state. It accounts for about 15% of Indiana's operating Coal capacity and 10% of all operating capacity in the state. Nationally it is the 12th-largest of the 324 operating Coal plants in the database. Commissioned in 1984, it is older than 65% of the 73 operating Indiana plants with a recorded commissioning year. Its operator, INDIANA MICHIGAN POWER CO, runs 3 operating plants in Indiana totaling 2,608 MW.

EIA-860 lists 2 generators at the site with 2,600 MW of nameplate capacity, all conventional steam coal technology. Net generation was 5,061 GWh in 2024 (a 22% capacity factor), up 12% from 2022. Its generators came online between 1984 and 1989.

Grid neighborhood

The closest transmission line found within 10 miles is a 765 kV line owned by SOUTHERN INDIANA GAS & ELEC CO, under 0.1 miles away. Another 3 operating power plants totaling 1,257 MW sit within 25 miles; the largest is WARRICK (800 MW, Coal).

Computed by Bywatts from HIFLD power plant and transmission line records and EIA-860/923 survey data; distances are straight-line. Sources and methodology

Weather peril exposure

ROCKPORT is a 2,600 MW coal power plant in Spencer County, IN, operated by INDIANA MICHIGAN POWER CO, commissioned in 1984. Spencer County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.7 of 5 at the 67th national percentile. Heat wave is the leading peril, rated Relatively Low by FEMA at the 90th percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a coal plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

3.7 of 5Modeled catastrophe exposure

HighExposure band

Heat waveLeading peril

Very LowFEMA county risk rating

Spencer County hazard ratings

Peril	FEMA rating	National percentile	Peril score	Events per year
Heat wave	Relatively Low	90th	4.6 of 5	8.0
Earthquake	Relatively Low	90th	4.6 of 5	<0.01
Strong wind	Relatively Moderate	86th	4.4 of 5	5.0
Ice storm	Relatively Moderate	82nd	4.3 of 5	1.2
Winter weather	Relatively Low	72nd	3.9 of 5	8.5
Hail	Relatively Low	71st	3.9 of 5	3.2
Riverine flooding	Relatively Low	62nd	3.5 of 5	2.9
Tornado	Relatively Low	58th	3.3 of 5	0.29
Wildfire	Very Low	41st	2.6 of 5	<0.01
Lightning	Very Low	40th	2.6 of 5	52.4
Hurricane	Very Low	23rd	1.9 of 5	<0.01

Perils not assessed in Spencer County

These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.

Peril	Why it is not scored
Coastal flooding	FEMA rating is "Not Applicable" for this county

Model hail, wind and flood exposure for Spencer County in the weather risk calculator

Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.

Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.