Grand Isle Gas Plant / Treating Station
Grand Isle Gas Plant / Treating Station is a 9 MW natural gas power plant in Jefferson County, Louisiana, operated by Cox Operating LLC. EIA-860M lists 3 generating units here, inside MISO. Its units entered service in 1965.
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
- 9 MW
- 8.7 MW net summer
- Generating units
- 3
- In service
- 1965
- EIA plant ID
- 54927
Where it is
Loading map…
- County
- Jefferson County, Louisiana
- Coordinates
- 29.2521, -89.9721
- Balancing authority
- MISO
- Sector
- Industrial Non-CHP
Units, technology and status
- Operator of record
- Cox Operating LLC
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Internal Combustion Engine
- Status
- Operating
Grand Isle Gas Plant / Treating Station: FAQ
- Where is Grand Isle Gas Plant / Treating Station?
- In Jefferson County, Louisiana (LA). 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 Grand Isle Gas Plant / Treating Station?
- 9 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
- Who owns Grand Isle Gas Plant / Treating Station?
- EIA-860M names Cox Operating 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 Grand Isle Gas Plant / Treating Station LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Cox Operating 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 "Grand Isle Gas Plant / Treating Station LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Grand Isle Gas Plant / Treating Station still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.