MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/989
EIA plant 989

Mishawaka · St Joseph · IN

Twin Branch

Operated by Indiana Michigan Power Co

Annual generation22,914 MWhSum of represented EIA-923 rows
Fuel codesWATCodes retained from EIA records
Grid contextPJM Interconnection, LLCBalancing authority or NERC region

Published location

Where is Twin Branch?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

41.665000, -86.132200

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Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

2024 monthly net generation

MonthNet generation
12,099 MWh
21,998 MWh
32,208 MWh
42,052 MWh
52,372 MWh
62,222 MWh
72,285 MWh
81,989 MWh
91,218 MWh
101,289 MWh
111,484 MWh
121,698 MWh

Operating generators

IDTechnologyFuelMWStatus
H1EConventional HydroelectricWAT0.6OP
H1WConventional HydroelectricWAT0.6OP
H2WConventional HydroelectricWAT0.6OP
H3WConventional HydroelectricWAT0.6OP
H4WConventional HydroelectricWAT0.6OP
H5WConventional HydroelectricWAT0.6OP
H6EConventional HydroelectricWAT0.6OP
H6WConventional HydroelectricWAT0.6OP

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Identity, technology and limitations
EIA plant ID
989
Sector
Electric Utility
Water source
St Joseph River
Data edition
2024-final