Grand Isle Gas Plant / Treating Station
Jefferson County, Louisiana · EIA plant ID 54927 · Operator: Cox Operating LLC
Nameplate9MWSummer 9 MW
Generators3in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1965
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), primary-fuel 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 3.6 | 4.6% | — |
| 2002 | 6.1 | 8.0% | 13,436 |
| 2003 | 3.3 | 4.3% | 13,436 |
| 2005 | 0 | 0.0% | — |
| 2006 | 0 | 0.0% | — |
| 2014 | 0 | 0.0% | 14,333 |
| 2015 | 0 | 0.0% | 20,500 |
| 2016 | 0 | 0.0% | 16,000 |
| 2017 | 0 | 0.0% | 13,750 |
| 2018 | 0 | 0.0% | — |
| 2019 | 4.7 | 6.2% | 12,267 |
| 2020 | 0 | 0.0% | — |
| 2021 | 0 | 0.0% | — |
| 2022 | 0 | 0.0% | — |
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 | Natural Gas Internal Combustion Engine | IC | 3 | 2.9 | Jan 1965 | Operating | — | coming soon |
| 2 | Natural Gas Internal Combustion Engine | IC | 3 | 2.9 | Jan 1965 | Operating | — | coming soon |
| 3 | Natural Gas Internal Combustion Engine | IC | 3 | 2.9 | Jan 1965 | Operating | — | coming soon |
Owner / operator
Operator: Cox Operating LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Energy XXI Pipeline II, LLC | 100.0% | 9 MW |
Nearby plants
Within 80 km.
| Alliance Refinery | retired | 48 km |
| Oak Point Cogen | 24 MW | 62.4 km |
| CII Carbon LLC | 46 MW | 75.7 km |
| Chalmette Refining LLC | 6 MW | 76.3 km |
| Domino Sugar Arabi Plant | 14 MW | 77.3 km |
| Nine Mile Point | 2,440 MW | 79.1 km |