Flat Rock
St. Lawrence County, New York · EIA plant ID 2563 · Operator: Erie Boulevard Hydropower LP
Nameplate5MWSummer 5 MW
Generators2in service
Net generation15GWh12 mo to Dec 2025
Capacity factor32%hydro units, summer MW
Heat rate—thermal plants only
First online1924
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 | 16.4 | 37.5% | — |
| 2002 | 16.2 | 37.0% | — |
| 2003 | 18.3 | 41.9% | — |
| 2004 | 1.3 | 2.9% | — |
| 2005 | 17.4 | 37.8% | — |
| 2006 | 22 | 47.6% | — |
| 2007 | 17.7 | 51.9% | — |
| 2008 | 23.4 | 68.2% | — |
| 2009 | 20 | 58.6% | — |
| 2010 | 17.7 | 51.7% | — |
| 2011 | 21.7 | 63.6% | — |
| 2012 | 15.4 | 44.8% | — |
| 2013 | 19.8 | 43.5% | — |
| 2014 | 18.8 | 41.2% | — |
| 2015 | 13.2 | 28.9% | — |
| 2016 | 14.8 | 32.4% | — |
| 2017 | 24.2 | 53.2% | — |
| 2018 | 19.4 | 42.7% | — |
| 2019 | 22.1 | 48.6% | — |
| 2020 | 11.4 | 25.0% | — |
| 2021 | 14.5 | 31.7% | — |
| 2022 | 19.3 | 42.4% | — |
| 2023 | 21.5 | 47.2% | — |
| 2024 | 19 | 41.5% | — |
| 2025 | 14.6 | 32.1% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | HY | 2 | 2.4 | Jan 1924 | Operating | — | coming soon |
| 2 | Conventional Hydroelectric | HY | 3 | 2.8 | Jan 1924 | Operating (Out of service, expected back within the year) | — | 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% | 5 MW |
Nearby plants
Within 80 km.
| Browns Falls | 16 MW | 1.6 km |
| Upper Newton Falls | 2 MW | 6.6 km |
| South Edwards | 4 MW | 11 km |
| Oswegatchie | 2 MW | 11.3 km |
| Talcville | 1 MW | 21 km |
| Diana Hydroelectric | 2 MW | 21.2 km |