High Dam
Hydro power plant in Oswego County, New York. 9.1 MW of nameplate capacity across 3 generators, operated by Oswego, City of - (NY).
Also known as EIA plant 2574
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 9.1 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- August 1928First generator online
- Operator
- Oswego, City of - (NY)EIA operator ID 14240
- Grid
- NYISOBalancing authority NYIS
- Price nodes
- None linkedNo verified ISO node
- Location
- Oswego County, NY43.4436, −76.4961
- EIA plant ID
- 2574EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power High Dam produces
Free · EIA-923Net generation, 2025
19.1 GWh
19,149 MWh, final
Capacity factor, 2025
18.4%
2024: 24.4%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
0.0–45.1
GWh a year. Low 2022, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 44,000 | Not reported | 12 of 12 |
| 2003 | 48,000 | Not reported | 12 of 12 |
| 2004 | 56,287 | Not reported | 12 of 12 |
| 2005 | 42,369 | Not reported | 12 of 12 |
| 2006 | 49,507 | Not reported | 12 of 12 |
| 2007 | 40,515 | Not reported | 12 of 12 |
| 2008 | 39,611 | Not reported | 12 of 12 |
| 2009 | 42,223 | Not reported | 12 of 12 |
| 2010 | 43,127 | 41.4% | 12 of 12 |
| 2011 | 48,271 | 46.3% | 12 of 12 |
| 2012 | 36,392 | 34.8% | 12 of 12 |
| 2013 | 45,960 | 44.1% | 12 of 12 |
| 2014 | 49,807 | 47.8% | 12 of 12 |
| 2015 | 45,107 | 43.3% | 12 of 12 |
| 2016 | 35,598 | 34.1% | 12 of 12 |
| 2017 | 43,257 | 41.5% | 12 of 12 |
| 2018 | 30,254 | 29.0% | 12 of 12 |
| 2019 | 43,617 | 41.8% | 12 of 12 |
| 2020 | 18,887 | 18.1% | 12 of 12 |
| 2021 | 21,402 | 20.5% | 12 of 12 |
| 2022 | 0 | 0.0% | 12 of 12 |
| 2023 | 3,841 | 3.7% | 12 of 12 |
| 2024 | 25,554 | 24.4% | 12 of 12 |
| 2025 | 19,149 | 18.4% | 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 |
|---|---|---|---|
| 2 | Conventional Hydroelectric | 2.8 | August 1928 |
| 3 | Conventional Hydroelectric | 2.8 | August 1928 |
| 4 | Conventional Hydroelectric | 3.5 | August 1949 |
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 Oswego, City of - (NY) 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 High Dam
How much power does High Dam produce?
High Dam reported 19,149 MWh (19.1 GWh) of net generation in 2025, a 18.4% capacity factor on 9.1 MW of nameplate capacity.
Where is High Dam?
High Dam is in Oswego County, New York, at 43.4436, −76.4961. It is in the New York Independent System Operator balancing area (NYIS).
Who operates High Dam?
EIA-860M for August 2026 lists Oswego, City of - (NY) as the operator (EIA operator ID 14240). The operator is not always the owner.
When did High Dam start operating?
Its first generator began operating in August 1928, 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page