Pilot Knob
Imperial County, California · EIA plant ID 388 · Operator: Imperial Irrigation District
Nameplate33MWSummer 18 MW
Generators2in service
Net generation13GWh12 mo to Dec 2025
Capacity factor8%hydro units, summer MW
Heat rate—thermal plants only
First online1957
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 | 19.7 | 32.1% | — |
| 2002 | 13.6 | 22.2% | — |
| 2003 | 11.7 | 19.1% | — |
| 2004 | 59.2 | 96.2% | — |
| 2005 | 7.9 | 12.9% | — |
| 2006 | 13.4 | 21.8% | — |
| 2007 | 13.6 | 22.2% | — |
| 2008 | 27.2 | 44.3% | — |
| 2009 | 27 | 44.1% | — |
| 2010 | 24.3 | 39.6% | — |
| 2011 | 23.5 | 38.4% | — |
| 2012 | 30 | 48.9% | — |
| 2013 | 20.6 | — | — |
| 2014 | 22.2 | — | — |
| 2015 | 22.7 | — | — |
| 2016 | 23.6 | — | — |
| 2017 | 25.6 | — | — |
| 2018 | 31.8 | — | — |
| 2019 | 23.5 | — | — |
| 2020 | 17.9 | — | — |
| 2021 | 20.8 | — | — |
| 2022 | 28.3 | — | — |
| 2023 | 14.2 | — | — |
| 2024 | 16.7 | — | — |
| 2025 | 13.4 | 8.4% | — |
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 | 16.5 | 10.4 | Jan 1957 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 16.5 | 7.7 | Jan 1957 | Operating | — | coming soon |
Owner / operator
Operator: Imperial Irrigation District. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Imperial Irrigation District | 100.0% | 33 MW |
Nearby plants
Within 80 km.
| Yucca | 422 MW | 1.7 km |
| Yuma Cogeneration Associates | 63 MW | 5.7 km |
| Siphon Drop Power Plant | 4 MW | 8.8 km |
| Arizona Western College PV | 5 MW | 21.1 km |
| Drop 1 | 6 MW | 21.6 km |
| ORCHARD Solar Generation and BESS | — | 23.5 km |