Derby Hydro
Hydro power plant in Fairfield County, Connecticut. 8 MW of nameplate capacity across 2 generators, operated by McCallum Enterprises I LP.
Also known as EIA plant 10063
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 8 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- January 1989First generator online
- Operator
- McCallum Enterprises I LPEIA operator ID 11943
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Fairfield County, CT41.3243, −73.1021
- EIA plant ID
- 10063EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Derby Hydro produces
Free · EIA-923Net generation, 2025
22.7 GWh
22,667 MWh, final
Capacity factor, 2025
30.1%
2024: 31.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
9.3–32.4
GWh a year. Low 2023, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 20,964 | Not reported | 12 of 12 |
| 2002 | 18,641 | Not reported | 12 of 12 |
| 2003 | 33,384 | Not reported | 12 of 12 |
| 2004 | 24,702 | Not reported | 12 of 12 |
| 2005 | 28,511 | Not reported | 12 of 12 |
| 2006 | 34,401 | Not reported | 12 of 12 |
| 2007 | 22,854 | Not reported | 12 of 12 |
| 2008 | 33,175 | Not reported | 12 of 12 |
| 2009 | 28,948 | Not reported | 12 of 12 |
| 2010 | 22,660 | 30.1% | 12 of 12 |
| 2011 | 29,010 | 38.5% | 12 of 12 |
| 2012 | 19,533 | 25.9% | 12 of 12 |
| 2013 | 23,426 | 31.1% | 12 of 12 |
| 2014 | 27,557 | 36.6% | 12 of 12 |
| 2015 | 17,852 | 23.7% | 12 of 12 |
| 2016 | 11,927 | 15.8% | 12 of 12 |
| 2017 | 21,367 | 28.4% | 12 of 12 |
| 2018 | 32,395 | 43.0% | 12 of 12 |
| 2019 | 17,334 | 23.0% | 12 of 12 |
| 2020 | 13,497 | 17.9% | 12 of 12 |
| 2021 | 31,545 | 41.9% | 12 of 12 |
| 2022 | 21,853 | 29.0% | 12 of 12 |
| 2023 | 9,338 | 12.4% | 12 of 12 |
| 2024 | 23,927 | 31.7% | 12 of 12 |
| 2025 | 22,667 | 30.1% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ISONEEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 4.0 | January 1989 |
| GEN2 | Conventional Hydroelectric | 4.0 | January 1989 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists McCallum Enterprises I LP as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Derby Hydro
How much power does Derby Hydro produce?
Derby Hydro reported 22,667 MWh (22.7 GWh) of net generation in 2025, a 30.1% capacity factor on 8 MW of nameplate capacity.
Where is Derby Hydro?
Derby Hydro is in Fairfield County, Connecticut, at 41.3243, −73.1021. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Derby Hydro?
EIA-860M for August 2026 lists McCallum Enterprises I LP as the operator (EIA operator ID 11943). The operator is not always the owner.
When did Derby Hydro start operating?
Its first generator began operating in January 1989, according to EIA-860M.
Does InfraMap have power prices for Derby Hydro?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Derby Hydro, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page