Longfalls Facility
Jefferson County, New York · EIA plant ID 54548 · Operator: Ampersand Long Falls Hydro, LLC
Nameplate3MWSummer 3 MW
Generators1in service
Net generation5GWh12 mo to Dec 2025
Capacity factor21%hydro units, summer MW
Heat rate—thermal plants only
First online1991
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) |
|---|---|---|---|
| 2003 | 8 | 30.5% | — |
| 2004 | 9.1 | 34.4% | — |
| 2005 | 9 | 34.4% | — |
| 2006 | 0 | 0.0% | — |
| 2007 | 0 | 0.0% | — |
| 2008 | 11.2 | 42.6% | — |
| 2009 | 0 | 0.0% | — |
| 2010 | 0 | 0.0% | — |
| 2011 | 0 | 0.0% | — |
| 2012 | 0 | 0.1% | — |
| 2013 | 0 | 0.1% | — |
| 2014 | 5.2 | 19.6% | — |
| 2015 | 8.5 | 32.5% | — |
| 2016 | 8.3 | 31.6% | — |
| 2017 | 13.5 | 51.3% | — |
| 2018 | 4.4 | 16.6% | — |
| 2019 | 1 | 3.8% | — |
| 2020 | 0 | 0.0% | — |
| 2021 | 0 | 0.0% | — |
| 2022 | 0 | 0.0% | — |
| 2023 | 0.9 | 3.4% | — |
| 2025 | 5.4 | 20.7% | — |
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 | 3.3 | 3 | Oct 1991 | Operating | — | coming soon |
Owner / operator
Operator: Ampersand Long Falls Hydro, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Ampersand Long Falls Hydro, LLC | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| West End Dam Hydroelectric Project | 4 MW | 0.4 km |
| Carthage Energy LLC | 63 MW | 0.4 km |
| Tannery Island Power | 2 MW | 0.9 km |
| NY 26 Carthage CSG | 5 MW | 2.9 km |
| Carthage B | 3 MW | 3.1 km |
| Carthage A | 5 MW | 3.6 km |