Island Park
Hydro power plant in Fremont County, Idaho. 4.8 MW of nameplate capacity across 2 generators, operated by Fall River Rural Elec Coop Inc.
Also known as EIA plant 4204
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 4.8 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- April 1994First generator online
- Operator
- Fall River Rural Elec Coop IncEIA operator ID 6169
- Grid
- BPATBalancing authority BPAT
- Price nodes
- None linkedNo verified ISO node
- Location
- Fremont County, ID44.4183, −111.3960
- EIA plant ID
- 4204EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Island Park produces
Free · EIA-923Net generation, 2025
9.68 GWh
9,684 MWh, final
Capacity factor, 2025
23.0%
2024: 42.4%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
4.8–18.9
GWh a year. Low 2016, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 0 | Not reported | 12 of 12 |
| 2001 | 14,798 | Not reported | 12 of 12 |
| 2002 | 10,451 | Not reported | 12 of 12 |
| 2003 | 658 | Not reported | 12 of 12 |
| 2004 | 13 | Not reported | 12 of 12 |
| 2005 | 17 | Not reported | 12 of 12 |
| 2006 | 22 | Not reported | 12 of 12 |
| 2007 | 17 | Not reported | 12 of 12 |
| 2008 | 17,349 | Not reported | 12 of 12 |
| 2009 | 20,206 | Not reported | 12 of 12 |
| 2010 | 18,055 | 42.9% | 12 of 12 |
| 2011 | 20,985 | 49.9% | 12 of 12 |
| 2012 | 23,395 | 55.5% | 12 of 12 |
| 2013 | 18,260 | 43.4% | 12 of 12 |
| 2014 | 15,667 | 37.3% | 12 of 12 |
| 2015 | 14,249 | 33.9% | 12 of 12 |
| 2016 | 4,848 | 11.5% | 12 of 12 |
| 2017 | 18,409 | 43.8% | 12 of 12 |
| 2018 | 17,366 | 41.3% | 12 of 12 |
| 2019 | 13,513 | 32.1% | 12 of 12 |
| 2020 | 18,859 | 44.7% | 12 of 12 |
| 2021 | 12,372 | 29.4% | 12 of 12 |
| 2022 | 13,227 | 31.5% | 12 of 12 |
| 2023 | 16,285 | 38.7% | 12 of 12 |
| 2024 | 17,858 | 42.4% | 12 of 12 |
| 2025 | 9,684 | 23.0% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
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 |
|---|---|---|---|
| HY1 | Conventional Hydroelectric | 2.4 | April 1994 |
| HY2 | Conventional Hydroelectric | 2.4 | April 1994 |
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 Fall River Rural Elec Coop Inc as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Island Park
More plants operated by Fall River Rural Elec Coop Inc
Questions about Island Park
How much power does Island Park produce?
Island Park reported 9,684 MWh (9.68 GWh) of net generation in 2025, a 23.0% capacity factor on 4.8 MW of nameplate capacity.
Where is Island Park?
Island Park is in Fremont County, Idaho, at 44.4183, −111.3960. It is in the Bonneville Power Administration balancing area (BPAT).
Who operates Island Park?
EIA-860M for August 2026 lists Fall River Rural Elec Coop Inc as the operator (EIA operator ID 6169). The operator is not always the owner.
When did Island Park start operating?
Its first generator began operating in April 1994, according to EIA-860M.
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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page