Little Mac Project
Twin Falls County, Idaho · EIA plant ID 10049 · Operator: Little Mac Power Company
Nameplate2MWSummer 2 MW
Generators4in service
Net generation4GWh12 mo to Dec 2025
Capacity factor33%hydro units, summer MW
Heat rate—thermal plants only
First online1984
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 | 4.7 | 36.1% | — |
| 2002 | 5.9 | 44.8% | — |
| 2003 | 4.8 | 36.6% | — |
| 2004 | 4.8 | 36.1% | — |
| 2005 | 5.2 | 39.5% | — |
| 2006 | 5.7 | 43.3% | — |
| 2007 | 4.3 | 32.4% | — |
| 2009 | 6.1 | 46.1% | — |
| 2010 | 5.8 | 44.1% | — |
| 2011 | 6.6 | 50.5% | — |
| 2012 | 5.8 | 44.1% | — |
| 2013 | 4.8 | 36.8% | — |
| 2015 | 5.5 | 41.5% | — |
| 2016 | 5.8 | 43.8% | — |
| 2017 | 5.9 | 44.9% | — |
| 2018 | 6.1 | 46.6% | — |
| 2019 | 5.8 | 44.3% | — |
| 2020 | 6.3 | 48.0% | — |
| 2021 | 5 | 37.8% | — |
| 2022 | 3.7 | 28.1% | — |
| 2023 | 4.5 | 34.5% | — |
| 2024 | 5 | 37.6% | — |
| 2025 | 4.3 | 32.5% | — |
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 | 0.3 | 0.3 | May 1984 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 0.4 | 0.4 | May 1984 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 0.4 | 0.4 | May 1984 | Operating | — | coming soon |
| 4 | Conventional Hydroelectric | HY | 0.4 | 0.4 | May 1984 | Operating | — | coming soon |
Owner / operator
Operator: Little Mac Power Company. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Little Mac Power Company | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Filer BESS | 2 MW | 8.4 km |
| Marco Ranch | 1 MW | 8.5 km |
| Rock Creek I | 2 MW | 10.1 km |
| Cargill B6 Biofactory | 2 MW | 10.4 km |
| Clear Lake | 3 MW | 10.5 km |
| Rock Creek II | 2 MW | 10.7 km |