Caithness Long Island Energy Center
Caithness Long Island Energy Center is a 349 MW natural gas power plant in Suffolk County, New York, operated by Caithness Long Island, LLC. EIA-860M lists 2 generating units here, inside NYISO. Its units entered service in 2009.
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
- 348.9 MW
- 317.3 MW net summer
- Generating units
- 2
- In service
- 2009
- EIA plant ID
- 56234
Where it is
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- County
- Suffolk County, New York
- Coordinates
- 40.8142, -72.9403
- Balancing authority
- NYIS
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Caithness Long Island, LLC
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combined Cycle
- Status
- Operating
Caithness Long Island Energy Center: FAQ
- Where is Caithness Long Island Energy Center?
- In Suffolk 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 Caithness Long Island Energy Center?
- 349 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Caithness Long Island Energy Center?
- EIA-860M names Caithness Long Island, LLC 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 Caithness Long Island Energy Center LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Caithness Long Island, LLC 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 "Caithness Long Island Energy Center LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Caithness Long Island Energy Center still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.