CD4
Mono County, California · EIA plant ID 63490 · Operator: CD4
Nameplate44MWSummer 30 MW
Generators1in service
Net generation236GWh12 mo to Dec 2025
Capacity factor91%geothermal units, summer MW
Heat rate—thermal plants only
First online2022
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), geothermal 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) |
|---|---|---|---|
| 2022 | 132.5 | 101.4% | — |
| 2023 | 272.3 | 105.0% | — |
| 2024 | 276.9 | 106.5% | — |
| 2025 | 236.3 | 91.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| OEC1 | Geothermal | BT | 44.4 | 29.6 | Jul 2022 | Operating | — | coming soon |
Owner / operator
Operator: CD4. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| CD4 | 100.0% | 44 MW |
Nearby plants
Within 80 km.
| Mammoth Pacific I | 10 MW | 0.2 km |
| Ples I | 15 MW | 0.5 km |
| Mammoth Pacific II | 15 MW | 0.6 km |
| Rush Creek | 13 MW | 22.7 km |
| Upper Gorge | 38 MW | 30.8 km |
| Middle Gorge | 38 MW | 34.1 km |