Hewittville Hydroelectric
St. Lawrence County, New York · EIA plant ID 50268 · Operator: Erie Boulevard Hydropower LP
Nameplate3MWSummer 2 MW
Generators1in service
Net generation12GWh12 mo to Dec 2025
Capacity factor64%hydro units, summer MW
Heat rate—thermal plants only
First online1984
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 | 15.1 | 60.5% | — |
| 2002 | 15.4 | 60.8% | — |
| 2003 | 16 | 63.1% | — |
| 2004 | 16.6 | 65.2% | — |
| 2005 | 16.6 | 65.3% | — |
| 2006 | 17.3 | 68.0% | — |
| 2007 | 7 | 27.4% | — |
| 2008 | 16.5 | 64.9% | — |
| 2009 | 17.4 | 68.6% | — |
| 2010 | 17.4 | 68.7% | — |
| 2011 | 16.8 | 66.3% | — |
| 2012 | 13.4 | 52.6% | — |
| 2013 | 17.6 | 91.3% | — |
| 2014 | 14.6 | 75.9% | — |
| 2015 | 14.4 | 74.7% | — |
| 2016 | 14.1 | 72.9% | — |
| 2017 | 16.1 | 83.7% | — |
| 2018 | 13.4 | 69.5% | — |
| 2019 | 15.6 | 80.8% | — |
| 2020 | 11.8 | 61.1% | — |
| 2021 | 14.3 | 74.4% | — |
| 2022 | 14.6 | 75.7% | — |
| 2023 | 13.2 | 68.6% | — |
| 2024 | 13.8 | 71.5% | — |
| 2025 | 12.4 | 64.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| HY1 | Conventional Hydroelectric | HY | 3 | 2.2 | Sep 1984 | Operating | — | coming soon |
Owner / operator
Operator: Erie Boulevard Hydropower LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Erie Boulevard Hydropower LP | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Unionville Hydro Project 2499 NY | 3 MW | 1.4 km |
| Sissonville Hydro | 3 MW | 2.2 km |
| Norwood | 2 MW | 4.3 km |
| NY Lancaster Shisler Rd Site 2 Solar CSG | 5 MW | 4.5 km |
| NY Potsdam 28 Hamilton St. Solar | 4 MW | 4.5 km |
| Clarkson Solar | 2 MW | 5.9 km |