Monticello Dam
Solano County, California · EIA plant ID 7646 · Operator: Solano Irrigation District
Nameplate12MWSummer 12 MW
Generators3in service
Net generation41GWh12 mo to Dec 2025
Capacity factor40%hydro units, summer MW
Heat rate—thermal plants only
First online1983
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) |
|---|---|---|---|
| 2002 | 43.7 | 41.9% | — |
| 2003 | 46.5 | 44.6% | — |
| 2004 | 56.8 | 54.3% | — |
| 2005 | 43.4 | 41.6% | — |
| 2006 | 66.7 | 64.0% | — |
| 2007 | 44.7 | 42.9% | — |
| 2008 | 39.7 | 38.0% | — |
| 2009 | 39.7 | 38.0% | — |
| 2010 | 35.8 | 34.4% | — |
| 2011 | 26.8 | 26.6% | — |
| 2012 | 40.6 | 40.2% | — |
| 2013 | 43.1 | 42.8% | — |
| 2014 | 39.2 | 38.9% | — |
| 2015 | 35.1 | 34.9% | — |
| 2016 | 35 | 34.6% | — |
| 2017 | 53.6 | 53.2% | — |
| 2018 | 32.9 | 32.7% | — |
| 2019 | 44.2 | 43.8% | — |
| 2020 | 42.1 | 41.7% | — |
| 2021 | 31 | 30.8% | — |
| 2022 | 35.2 | 34.9% | — |
| 2023 | 32.4 | 32.1% | — |
| 2024 | 36.4 | 36.0% | — |
| 2025 | 40.7 | 40.4% | — |
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 | 5 | 5 | Jun 1983 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 5 | 5 | Jun 1983 | Operating | — | coming soon |
| 3 | Conventional Hydroelectric | HY | 1.5 | 1.5 | Jun 1983 | Operating | — | coming soon |
Owner / operator
Operator: Solano Irrigation District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Solano Irrigation District | 100.0% | 12 MW |
Nearby plants
Within 80 km.
| Putah Creek Solar Farm North | 3 MW | 9.6 km |
| Putah Creek Solar Farm | 2 MW | 9.7 km |
| Mariani Packing Vacaville Solar | 1 MW | 17.6 km |
| Vacaville | 1 MW | 17.8 km |
| Vaca Dixon Solar Station | 2 MW | 19.2 km |
| Genentech Vacaville Meter #1 | 6 MW | 19.3 km |