Derby Hydro
Fairfield County, Connecticut · EIA plant ID 10063 · Operator: McCallum Enterprises I LP
Nameplate9MWSummer 9 MW
Generators4in service
Net generation23GWh12 mo to Dec 2025
Capacity factor30%hydro units, summer MW
Heat rate—thermal plants only
First online1989
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 | 21 | 27.8% | — |
| 2002 | 18.6 | 24.7% | — |
| 2003 | 33.4 | 44.3% | — |
| 2004 | 24.7 | 32.7% | — |
| 2005 | 28.5 | 37.9% | — |
| 2006 | 34.4 | 45.7% | — |
| 2007 | 22.9 | 30.3% | — |
| 2008 | 33.2 | 43.9% | — |
| 2009 | 28.9 | 38.4% | — |
| 2010 | 22.7 | 30.1% | — |
| 2011 | 29 | 38.5% | — |
| 2012 | 19.5 | 25.9% | — |
| 2013 | 23.4 | 31.1% | — |
| 2014 | 27.6 | 36.6% | — |
| 2015 | 17.9 | 23.7% | — |
| 2016 | 11.9 | 15.8% | — |
| 2017 | 21.4 | 28.4% | — |
| 2018 | 32.4 | 43.0% | — |
| 2019 | 17.3 | 23.0% | — |
| 2020 | 13.5 | 17.9% | — |
| 2021 | 31.5 | 41.9% | — |
| 2022 | 21.9 | 29.0% | — |
| 2023 | 9.3 | 12.4% | — |
| 2024 | 23.9 | 31.7% | — |
| 2025 | 22.7 | 30.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | HY | 4 | 4 | Jan 1989 | Operating | — | coming soon |
| GEN2 | Conventional Hydroelectric | HY | 4 | 4 | Jan 1989 | Operating | — | coming soon |
| GEN3 | Conventional Hydroelectric | HY | 0.3 | 0.3 | Jan 1989 | Operating (Standby / backup) | — | coming soon |
| GEN4 | Conventional Hydroelectric | HY | 0.3 | 0.3 | Jan 1989 | Operating (Standby / backup) | — | coming soon |
Owner / operator
Operator: McCallum Enterprises I LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| McCallum Enterprises I LP | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Derby Fuel Cell | 14 MW | 0.3 km |
| Benz Solar 1 | 1 MW | 4 km |
| Benz Solar 2 | 1 MW | 4.1 km |
| Kinneytown New Old | 2 MW | 5.1 km |
| Emerald Gardens PKI, LLC | 2 MW | 6.1 km |
| Sikorsky Aircraft CHP | 10 MW | 8.3 km |