Port Leyden Hydroelectric Project
Port Leyden Hydroelectric Project is a 1 MW hydroelectric power plant in Lewis County, New York, operated by Lyonsdale Hydroelectric Co., Inc.. EIA-860M lists 2 generating units here, inside NYISO. Its units entered service in 1985.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 1 MW
- 1 MW net summer
- Generating units
- 2
- In service
- 1985
- EIA plant ID
- 10817
Where it is
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- County
- Lewis County, New York
- Coordinates
- 43.5836, -75.3392
- Balancing authority
- NYIS
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Lyonsdale Hydroelectric Co., Inc.
- Primary energy source
- Hydro
- Technologies
- Conventional Hydroelectric
- Status
- Operating
Every plant Lyonsdale Hydroelectric Co., Inc. reports to EIA →
Port Leyden Hydroelectric Project: FAQ
- Where is Port Leyden Hydroelectric Project?
- In Lewis County, New York (NY). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Port Leyden Hydroelectric Project?
- 1 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Port Leyden Hydroelectric Project?
- EIA-860M names Lyonsdale Hydroelectric Co., Inc. as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Port Leyden Hydroelectric Project LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Lyonsdale Hydroelectric Co., Inc. here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Port Leyden Hydroelectric Project LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Port Leyden Hydroelectric Project still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.