Cos Cob
Cos Cob is a 115 MW oil-fired power plant in Fairfield County, Connecticut, operated by Connecticut Jet Power LLC. EIA-860M lists 5 generating units here, inside ISO New England. Its units entered service between 1969 and 2008.
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
- 115 MW
- 95.6 MW net summer
- Generating units
- 5
- In service
- 1969–2008
- EIA plant ID
- 542
Where it is
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- County
- Fairfield County, Connecticut
- Coordinates
- 41.0289, -73.5989
- Balancing authority
- ISNE
- Sector
- IPP Non-CHP
Units, technology and status
- Operator of record
- Connecticut Jet Power LLC
- Primary energy source
- Petroleum
- Technologies
- Petroleum Liquids
- Status
- Operating
Cos Cob: FAQ
- Where is Cos Cob?
- In Fairfield County, Connecticut (CT). 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 Cos Cob?
- 115 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.
- Who owns Cos Cob?
- EIA-860M names Connecticut Jet Power 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 Cos Cob LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Connecticut Jet Power 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 "Cos Cob LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Cos Cob still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.