McSwain
Mariposa County, California · EIA plant ID 410 · Operator: Merced Irrigation District
Nameplate9MWSummer 9 MW
Generators1in service
Net generation27GWh12 mo to Dec 2025
Capacity factor34%hydro units, summer MW
Heat rate—thermal plants only
First online1967
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 | 27.6 | 35.0% | — |
| 2002 | 26.6 | 33.8% | — |
| 2003 | 23.4 | 29.6% | — |
| 2004 | 26.1 | 33.1% | — |
| 2005 | 41.2 | 52.3% | — |
| 2006 | 51 | 64.7% | — |
| 2007 | 220.4 | 279.5% | — |
| 2008 | 20.5 | 25.9% | — |
| 2009 | 25.8 | 32.8% | — |
| 2010 | 3.3 | 4.2% | — |
| 2011 | 54.8 | 69.5% | — |
| 2012 | 25.1 | 31.8% | — |
| 2013 | 20.2 | 25.7% | — |
| 2014 | 11.1 | 14.1% | — |
| 2015 | 0.9 | 1.2% | — |
| 2016 | 20.1 | 25.5% | — |
| 2017 | 55.8 | 70.7% | — |
| 2018 | 29.4 | 37.3% | — |
| 2019 | 46.9 | 59.5% | — |
| 2020 | 23.9 | 30.2% | — |
| 2021 | 17.7 | 22.4% | — |
| 2022 | 15.1 | 19.1% | — |
| 2023 | 44 | 55.8% | — |
| 2024 | 31.8 | 40.2% | — |
| 2025 | 26.7 | 33.9% | — |
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 | 9 | 9 | Jul 1967 | Operating | — | coming soon |
Owner / operator
Operator: Merced Irrigation District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Merced Irrigation District | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Merced Falls | 3 MW | 1.8 km |
| Exchequer | 95 MW | 7.8 km |
| Parker | 3 MW | 12.8 km |
| Upper Dawson | 4 MW | 20.1 km |
| La Grange | 5 MW | 20.2 km |
| UC Merced Solar Hybrid | 5 MW | 20.5 km |