Low Line Rapids
Twin Falls County, Idaho · EIA plant ID 10808 · Operator: Lower Lowline LLC
Nameplate3MWSummer 3 MW
Generators1in service
Net generation8GWh12 mo to Dec 2025
Capacity factor35%hydro units, summer MW
Heat rate—thermal plants only
First online1990
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 | 8.6 | 35.0% | — |
| 2002 | 9 | 38.6% | — |
| 2003 | 9.9 | 42.6% | — |
| 2004 | 9.4 | 40.3% | — |
| 2005 | 8.3 | 35.8% | — |
| 2006 | 9 | 38.7% | — |
| 2007 | 9.2 | 39.1% | — |
| 2008 | 9.8 | 41.3% | — |
| 2009 | 9.6 | 40.7% | — |
| 2010 | 10.2 | 43.2% | — |
| 2011 | 9.7 | 41.0% | — |
| 2012 | 8.6 | 36.2% | — |
| 2013 | 9.3 | 39.2% | — |
| 2014 | 7.7 | 32.4% | — |
| 2015 | 10.2 | 43.3% | — |
| 2016 | 8.2 | 34.7% | — |
| 2017 | 9.5 | 40.0% | — |
| 2018 | 9.8 | 41.3% | — |
| 2019 | 1.9 | 7.9% | — |
| 2020 | 0.1 | 0.4% | — |
| 2021 | 3.1 | 13.0% | — |
| 2022 | 7.9 | 33.2% | — |
| 2023 | 7.9 | 33.2% | — |
| 2024 | 8.7 | 36.6% | — |
| 2025 | 8.3 | 35.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 2.8 | 2.7 | Aug 1990 | Operating | — | coming soon |
Owner / operator
Operator: Lower Lowline LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Lower Lowline LLC | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| South Forks Hydro | 8 MW | 6 km |
| Amalgamated Sugar Twin Falls | 13 MW | 7.5 km |
| Clif Bar Bakery of Twin Falls | 2 MW | 7.6 km |
| Twin Falls (ID) | 53 MW | 12.6 km |
| Shoshone Falls | 15 MW | 13.5 km |
| Cargill Dry Creek Biofactory | retired | 13.7 km |