New Melones
Tuolumne County, California · EIA plant ID 6158 · Operator: U S Bureau of Reclamation
Nameplate300MWSummer 382 MW
Generators2in service
Net generation402GWh12 mo to Aug 2026
Capacity factor12%hydro units, summer MW
Heat rate—thermal plants only
First online1979
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 384.1 | 11.5% | — |
| 2002 | 371 | 11.1% | — |
| 2003 | 364.4 | 10.9% | — |
| 2004 | 335.4 | 10.0% | — |
| 2005 | 373 | 11.2% | — |
| 2006 | 910.2 | 27.2% | — |
| 2007 | 469.7 | 14.0% | — |
| 2008 | 365.7 | 10.9% | — |
| 2009 | 351.5 | 10.5% | — |
| 2010 | 339.8 | 10.2% | — |
| 2011 | 705.4 | 21.1% | — |
| 2012 | 439.7 | 13.1% | — |
| 2013 | 410.5 | 12.3% | — |
| 2014 | 275.6 | 8.2% | — |
| 2015 | 130.2 | 3.9% | — |
| 2016 | 212.1 | 6.3% | — |
| 2017 | 713 | 21.3% | — |
| 2018 | 472.1 | 14.1% | — |
| 2019 | 748.5 | 22.4% | — |
| 2020 | 433.4 | 12.9% | — |
| 2021 | 379.4 | 11.3% | — |
| 2022 | 268.3 | 8.0% | — |
| 2023 | 467.5 | 14.0% | — |
| 2024 | 520.2 | 15.5% | — |
| 2025 | 270.6 | 8.1% | — |
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 | 150 | 191 | Jun 1979 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 150 | 191 | Jun 1979 | Operating | — | coming soon |
Owner / operator
Operator: U S Bureau of Reclamation. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| U S Bureau of Reclamation | 100.0% | 300 MW |
Nearby plants
Within 80 km.
| Sonora 1 | 2 MW | 6.4 km |
| Sierra Energy Storage, LLC | 10 MW | 9.2 km |
| Pacific-Ultrapower Chinese Station | 25 MW | 9.2 km |
| Sierra Pacific Chinese Camp | 4 MW | 9.6 km |
| Tulloch | 30 MW | 10.4 km |
| Angels | 1 MW | 13.9 km |