Lower No 1
Bonneville County, Idaho · EIA plant ID 7012 · Operator: City of Idaho Falls - (ID)
Nameplate8MWSummer 8 MW
Generators1in service
Net generation42GWh12 mo to Dec 2025
Capacity factor59%hydro units, summer MW
Heat rate—thermal plants only
First online1982
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) |
|---|---|---|---|
| 2002 | 29.7 | 42.4% | — |
| 2003 | 28.7 | 41.0% | — |
| 2004 | 35.6 | 50.7% | — |
| 2005 | 37.4 | 53.3% | — |
| 2006 | 45.8 | 65.3% | — |
| 2007 | 40.6 | 58.0% | — |
| 2008 | 4.5 | 6.4% | — |
| 2009 | 4.8 | 6.9% | — |
| 2010 | 36.9 | 52.6% | — |
| 2011 | 39.6 | 56.5% | — |
| 2012 | 55.2 | 78.6% | — |
| 2013 | 43.6 | 62.3% | — |
| 2014 | 42 | 60.0% | — |
| 2015 | 45.9 | 65.5% | — |
| 2016 | 41.6 | 59.2% | — |
| 2017 | 42 | 60.0% | — |
| 2018 | 42.3 | 60.4% | — |
| 2019 | 42.8 | 61.0% | — |
| 2020 | 41.2 | 58.6% | — |
| 2021 | 30.1 | 42.9% | — |
| 2022 | 17 | 24.3% | — |
| 2023 | 39.6 | 56.5% | — |
| 2024 | 38.9 | 55.4% | — |
| 2025 | 41.6 | 59.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 2 | Conventional Hydroelectric | HY | 8 | 8 | Apr 1982 | Operating | — | coming soon |
Owner / operator
Operator: City of Idaho Falls - (ID). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Idaho Falls - (ID) | 100.0% | 8 MW |
Nearby plants
Within 80 km.
| Lower No 2 | 3 MW | 0 km |
| City Power Plant | 8 MW | 2.9 km |
| Gem State | 23 MW | 6.3 km |
| Upper Power Plant | 8 MW | 9.4 km |
| Cedar Creek Wind, LLC | 160 MW | 15.7 km |
| Goshen Phase II | 125 MW | 18.2 km |