American Falls
Power County, Idaho · EIA plant ID 809 · Operator: Idaho Power Co
Nameplate92MWSummer 87 MW
Generators3in service
Net generation206GWh12 mo to Dec 2025
Capacity factor27%hydro units, summer MW
Heat rate—thermal plants only
First online1978
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 | 230.3 | 30.6% | — |
| 2002 | 209.5 | 27.9% | — |
| 2003 | 205.8 | 54.8% | — |
| 2004 | 199.6 | 53.0% | — |
| 2005 | 224.9 | 59.9% | — |
| 2006 | 349.8 | 93.1% | — |
| 2007 | 262.4 | 69.8% | — |
| 2008 | 264.8 | 70.3% | — |
| 2009 | 384.9 | 39.8% | — |
| 2010 | 318.6 | 33.0% | — |
| 2011 | 586.8 | 60.7% | — |
| 2012 | 352.6 | 36.4% | — |
| 2013 | 243.8 | 25.2% | — |
| 2014 | 264.2 | 27.3% | — |
| 2015 | 294.3 | 30.4% | — |
| 2016 | 243.4 | 25.1% | — |
| 2017 | 483 | 49.9% | — |
| 2018 | 489.3 | 50.6% | — |
| 2019 | 382.5 | 39.6% | — |
| 2020 | 391.2 | 40.3% | — |
| 2021 | 251.5 | 30.1% | — |
| 2022 | 208.7 | 22.7% | — |
| 2023 | 262.2 | 29.8% | — |
| 2024 | 242.8 | 27.5% | — |
| 2025 | 206.3 | 27.1% | — |
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 | 30.8 | 20.3 | Jul 1978 | Operating (Standby / backup) | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 30.8 | 32.9 | Jun 1978 | Operating (Out of service, expected back within the year) | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 30.8 | 33.7 | Mar 1978 | Operating (Standby / backup) | — | coming soon |
Owner / operator
Operator: Idaho Power Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Idaho Power Co | 100.0% | 92 MW |
Nearby plants
Within 80 km.
| Power County Wind Park North | 23 MW | 11.3 km |
| American Falls Solar | 20 MW | 11.4 km |
| American Falls Solar II | 20 MW | 11.4 km |
| Rockland Wind Farm | 79 MW | 11.7 km |
| Power County Wind Park South | 23 MW | 12.7 km |
| Simplot Leasing Don Plant | 16 MW | 31.8 km |