Falls River Hydro
Fremont County, Idaho · EIA plant ID 54668 · Operator: Marysville Hydro Partners
Nameplate9MWSummer 9 MW
Generators2in service
Net generation43GWh12 mo to Dec 2025
Capacity factor55%hydro units, summer MW
Heat rate—thermal plants only
First online1993
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), hydro units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 28.9 | 36.6% | — |
| 2002 | 38.1 | 48.3% | — |
| 2003 | 41.3 | 52.4% | — |
| 2004 | 43 | 54.3% | — |
| 2005 | 44.7 | 56.7% | — |
| 2006 | 54.7 | 69.4% | — |
| 2007 | 42.4 | 53.7% | — |
| 2008 | 49.2 | 62.3% | — |
| 2009 | 54.2 | 68.8% | — |
| 2010 | 41.4 | 52.5% | — |
| 2011 | 57.1 | 72.5% | — |
| 2012 | 57.2 | 72.3% | — |
| 2013 | 44.8 | 56.8% | — |
| 2014 | 54.2 | 68.7% | — |
| 2015 | 40.3 | 51.2% | — |
| 2016 | 37.8 | 47.8% | — |
| 2017 | 64.8 | 82.2% | — |
| 2018 | 58.6 | 74.3% | — |
| 2019 | 47.8 | 60.7% | — |
| 2020 | 47.5 | 60.1% | — |
| 2021 | 37.3 | 47.3% | — |
| 2022 | 38.8 | 49.2% | — |
| 2023 | 44.2 | 56.1% | — |
| 2024 | 47.4 | 60.0% | — |
| 2025 | 43.2 | 54.8% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 4.5 | 4.5 | Aug 1993 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 4.5 | 4.5 | Aug 1993 | Operating | — | coming soon |
Owner / operator
Operator: Marysville Hydro Partners. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Marysville Hydro Partners | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Ashton | 7 MW | 11.7 km |
| Felt | 7 MW | 17.2 km |
| Chester Diversion Hydroelectric Project | 4 MW | 19 km |
| Island Park | 5 MW | 40 km |
| BYUI Central Energy Facility | 6 MW | 43.9 km |
| Old Faithful | 2 MW | 60.2 km |