Cosumnes
Sacramento County, California · EIA plant ID 55970 · Operator: Sacramento Municipal Util Dist
Nameplate557MWSummer 545 MW
Generators3in service
Net generation3,077GWh12 mo to Aug 2026
Capacity factor64%gas/coal/oil units, summer MW
Heat rate6,994Btu/kWhfossil units, electric fuel, HHV
First online2006Runs as baseload
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2006 | 2,485.4 | 65.0% | 7,496 |
| 2007 | 3,731.7 | 89.3% | 7,353 |
| 2008 | 3,838.1 | 91.6% | 7,064 |
| 2009 | 3,436.3 | 82.2% | 7,032 |
| 2010 | 3,738.6 | 89.5% | 6,952 |
| 2011 | 3,369.2 | 80.6% | 7,050 |
| 2012 | 3,622.7 | 86.5% | 6,935 |
| 2013 | 3,828.8 | 91.6% | 6,805 |
| 2014 | 3,980.1 | 90.3% | 6,780 |
| 2015 | 3,924.3 | 89.1% | 6,780 |
| 2016 | 3,859.1 | 86.1% | 6,794 |
| 2017 | 3,192.3 | 71.6% | 6,831 |
| 2018 | 3,398.8 | 73.0% | 6,718 |
| 2019 | 2,751.2 | 57.2% | 6,738 |
| 2020 | 3,693.5 | 76.4% | 6,699 |
| 2021 | 4,013.1 | 83.2% | 6,627 |
| 2022 | 912.7 | 19.1% | 7,373 |
| 2023 | 2,914.6 | 60.6% | 6,668 |
| 2024 | 3,841.5 | 79.7% | 6,584 |
| 2025 | 3,543.3 | 73.6% | 6,572 |
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 | Natural Gas Fired Combined Cycle | CA | 190 | 171 | Feb 2006 | Operating | — | coming soon |
| 2 | Natural Gas Fired Combined Cycle | CT | 196.8 | 185 | Feb 2006 | Operating | — | coming soon |
| 3 | Natural Gas Fired Combined Cycle | CT | 170 | 189 | Feb 2006 | Operating | — | coming soon |
Owner / operator
Operator: Sacramento Municipal Util Dist. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sacramento Municipal Util Dist | 100.0% | 557 MW |
Nearby plants
Within 80 km.
| Rancho Seco Solar, LLC | 11 MW | 0.8 km |
| Rancho Seco Solar II, LLC | 160 MW | 1 km |
| Dry Creek Energy Storage, LLC | — | 1 km |
| Sacramento Soleil LLC | 1 MW | 12.9 km |
| RE Dillard 4 LLC | 0 MW | 14.6 km |
| RE Dillard 3 LLC | 3 MW | 14.6 km |