Twin Branch
Twin Branch is a 5 MW hydroelectric power plant in St Joseph County, Indiana, operated by Indiana Michigan Power Co. EIA-860M lists 8 generating units here, inside PJM. Its units entered service in 1989.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 4.8 MW
- 4 MW net summer
- Generating units
- 8
- In service
- 1989
- EIA plant ID
- 989
Where it is
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- County
- St Joseph County, Indiana
- Coordinates
- 41.665, -86.1322
- Balancing authority
- PJM
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Indiana Michigan Power Co
- Primary energy source
- Hydro
- Technologies
- Conventional Hydroelectric
- Status
- Operating
Twin Branch: FAQ
- Where is Twin Branch?
- In St Joseph County, Indiana (IN). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Twin Branch?
- 5 MW of nameplate capacity across 8 units, as of the EIA-860M release for 2026-07.
- Who owns Twin Branch?
- EIA-860M names Indiana Michigan Power Co as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Twin Branch LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Indiana Michigan Power Co here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Twin Branch LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Twin Branch still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.