Diamond Island Plant
Hydro power plant in Jefferson County, New York. 1.2 MW of nameplate capacity across 3 generators, operated by Energen Renewables, LLC.
Also known as Diamond Island Power Station · EIA plant 10540
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1.2 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- January 1914First generator online
- Operator
- Energen Renewables, LLCEIA operator ID 67561
- Grid
- NYISOBalancing authority NYIS
- Price nodes
- None linkedNo verified ISO node
- Location
- Jefferson County, NY43.9786, −75.8861
- EIA plant ID
- 10540EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Diamond Island Plant produces
Free · EIA-923Net generation, 2025
1.83 GWh
1,833 MWh, final
Capacity factor, 2025
17.4%
2024: 24.6%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
1.8–7.1
GWh a year. Low 2025, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 6,416 | Not reported | 12 of 12 |
| 2002 | 6,031 | Not reported | 12 of 12 |
| 2003 | 5,481 | Not reported | 12 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | 6,760 | Not reported | 12 of 12 |
| 2006 | 7,836 | Not reported | 12 of 12 |
| 2007 | 5,445 | Not reported | 12 of 12 |
| 2008 | 7,619 | Not reported | 12 of 12 |
| 2009 | 7,799 | Not reported | 12 of 12 |
| 2010 | 6,293 | 59.9% | 12 of 12 |
| 2011 | 6,259 | 59.5% | 12 of 12 |
| 2012 | 5,593 | 53.1% | 12 of 12 |
| 2013 | 5,843 | 55.6% | 12 of 12 |
| 2014 | 6,316 | 60.1% | 12 of 12 |
| 2015 | 4,801 | 45.7% | 12 of 12 |
| 2016 | 5,257 | 49.9% | 12 of 12 |
| 2017 | 7,066 | 67.2% | 12 of 12 |
| 2018 | 5,105 | 48.6% | 12 of 12 |
| 2019 | 4,515 | 43.0% | 12 of 12 |
| 2020 | 1,870 | 17.7% | 12 of 12 |
| 2021 | 3,926 | 37.3% | 12 of 12 |
| 2022 | 4,117 | 39.2% | 12 of 12 |
| 2023 | 3,836 | 36.5% | 12 of 12 |
| 2024 | 2,592 | 24.6% | 12 of 12 |
| 2025 | 1,833 | 17.4% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
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 | 0.4 | January 1914 |
| GEN2 | Conventional Hydroelectric | 0.4 | January 1914 |
| GEN3 | Conventional Hydroelectric | 0.4 | January 1914 |
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 Energen Renewables, LLC 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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Power plants near Diamond Island Plant
More plants operated by Energen Renewables, LLC
Questions about Diamond Island Plant
How much power does Diamond Island Plant produce?
Diamond Island Plant reported 1,833 MWh (1.83 GWh) of net generation in 2025, a 17.4% capacity factor on 1.2 MW of nameplate capacity.
Where is Diamond Island Plant?
Diamond Island Plant is in Jefferson County, New York, at 43.9786, −75.8861. It is in the New York Independent System Operator balancing area (NYIS).
Who operates Diamond Island Plant?
EIA-860M for August 2026 lists Energen Renewables, LLC as the operator (EIA operator ID 67561). The operator is not always the owner.
When did Diamond Island Plant start operating?
Its first generator began operating in January 1914, according to EIA-860M.
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)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page