Twin Branch
Hydro power plant in St Joseph County, Indiana. 4.8 MW of nameplate capacity across 8 generators, operated by Indiana Michigan Power Co.
Also known as Twin Branch Power Plant · EIA plant 989
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 4.8 MWNameplate
- Generators
- 8 operatingEIA-860M, August 2026
- Operating since
- May 1989First generator online
- Operator
- Indiana Michigan Power CoEIA operator ID 9324
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- St Joseph County, IN41.6650, −86.1322
- EIA plant ID
- 989EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Twin Branch produces
Free · EIA-923Net generation, 2025
21.4 GWh
21,395 MWh, final
Capacity factor, 2025
50.9%
2024: 54.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
18.2–31.4
GWh a year. Low 2023, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 27,870 | Not reported | 12 of 12 |
| 2001 | 32,988 | Not reported | 12 of 12 |
| 2002 | 26,680 | Not reported | 12 of 12 |
| 2003 | 23,413 | Not reported | 12 of 12 |
| 2004 | 28,062 | Not reported | 12 of 12 |
| 2005 | 23,394 | Not reported | 12 of 12 |
| 2006 | 19,489 | Not reported | 12 of 12 |
| 2007 | 26,168 | Not reported | 12 of 12 |
| 2008 | 26,519 | Not reported | 12 of 12 |
| 2009 | 25,493 | Not reported | 12 of 12 |
| 2010 | 26,392 | 62.8% | 12 of 12 |
| 2011 | 27,578 | 65.6% | 12 of 12 |
| 2012 | 21,770 | 51.6% | 12 of 12 |
| 2013 | 28,674 | 68.2% | 12 of 12 |
| 2014 | 29,852 | Not reported | 12 of 12 |
| 2015 | 27,605 | 65.7% | 12 of 12 |
| 2016 | 29,156 | 69.2% | 12 of 12 |
| 2017 | 25,511 | 60.7% | 12 of 12 |
| 2018 | 31,379 | 74.6% | 12 of 12 |
| 2019 | 27,030 | 64.3% | 12 of 12 |
| 2020 | 24,368 | 57.8% | 12 of 12 |
| 2021 | 24,874 | 59.2% | 12 of 12 |
| 2022 | 24,184 | 57.5% | 12 of 12 |
| 2023 | 18,236 | 43.4% | 12 of 12 |
| 2024 | 22,914 | 54.3% | 12 of 12 |
| 2025 | 21,395 | 50.9% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| H1E | Conventional Hydroelectric | 0.6 | May 1989 |
| H1W | Conventional Hydroelectric | 0.6 | May 1989 |
| H2W | Conventional Hydroelectric | 0.6 | May 1989 |
| H3W | Conventional Hydroelectric | 0.6 | May 1989 |
| H4W | Conventional Hydroelectric | 0.6 | May 1989 |
| H5W | Conventional Hydroelectric | 0.6 | May 1989 |
| H6E | Conventional Hydroelectric | 0.6 | May 1989 |
| H6W | Conventional Hydroelectric | 0.6 | May 1989 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Indiana Michigan Power Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
300 analyst questions a month, plus MCP
Query Twin Branch and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Twin Branch
More plants operated by Indiana Michigan Power Co
Questions about Twin Branch
How much power does Twin Branch produce?
Twin Branch reported 21,395 MWh (21.4 GWh) of net generation in 2025, a 50.9% capacity factor on 4.8 MW of nameplate capacity.
Where is Twin Branch?
Twin Branch is in St Joseph County, Indiana, at 41.6650, −86.1322. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Twin Branch?
EIA-860M for August 2026 lists Indiana Michigan Power Co as the operator (EIA operator ID 9324). The operator is not always the owner.
When did Twin Branch start operating?
Its first generator began operating in May 1989, according to EIA-860M.
Does InfraMap have power prices for Twin Branch?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to Twin Branch, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page