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306 MW Natural Gas operating in Iberville, LA — Midcontinent Independent Transmission System Operator, Inc..
306 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combustion Turbine
Technology
1997
Operating Since
Coordinates
30.2586, -91.1850
County
Iberville, LA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Westlake Chemicals & Vinyls LLC | Westlake Chemicals & Vinyls | — |
| Owner(s) | Westlake Chemicals & Vinyls LLC | Westlake | — |
| Status | Operating | — | — |
Westlake Plaquemine is a 306 MW natural gas-fired power plant located in Iberville County, Louisiana. The plant began operating in 1997 and consists of three natural gas-fired combustion turbine generators. It is owned by Westlake and operated by Westlake Chemicals & Vinyls LLC. The plant's location places it within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the SERC Reliability Corporation NERC region.
In the most recent year of data, Westlake Plaquemine generated 1,495,275 MWh of electricity, achieving a capacity factor of 55.8%. The plant is ranked as the 23rd largest in Louisiana out of 32 plants, and 636th nationally out of 945 plants. News coverage of the plant has included 7 articles, with 5 focused on hazards and 2 on regulatory matters.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
34.5 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Industrial
Sector
Industrial CHP
119.8K MWh
Latest Month
1.5M MWh
Annual Generation
55.8%
Capacity Factor
CO₂ Intensity
609 lb/MWh
NOx
2 lb/MWh
SO₂
0.017 lb/MWh
CH₄
0.011 lb/MWh
N₂O
0.001 lb/MWh
Capacity Factor
55.2%
Annual Net Gen
1480 GWh
CO₂eq
610 lb/MWh
Subregion
SERC Mississippi Valley
2013
$965/kW
Est. Construction Cost
Total estimated cost: $295.3M
Market Position
ISO/RTO Market
MISO
LMP Node
EES.AXLPLQ
Pricing Hub
LOUISIANA.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
Last updated 2026-03-14
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