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903.9 MW Natural Gas operating in Ouachita, LA — Midcontinent Independent Transmission System Operator, Inc..
903.9 MW
Nameplate Capacity
6
Generators
units
Natural Gas Fired Combined Cycle
Technology
2002
Operating Since
Coordinates
32.7061, -92.0683
County
Ouachita, LA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Entergy Louisiana LLC | Entergy Arkansas | — |
| Owner(s) | Entergy Arkansas LLC, Entergy Louisiana LLC | Entergy | — |
| Status | Operating | — | — |
The Ouachita power plant is a 903.9 MW natural gas-fired combined cycle facility located in Ouachita County, Louisiana. The plant began operating in 2002 and consists of 6 generators. It is owned by Entergy and operated by Entergy Louisiana LLC. The plant is interconnected to the Midcontinent Independent Transmission System Operator (MISO) and falls within the SERC NERC region.
In the most recent year of data, the plant generated 3,944,657 MWh, achieving a capacity factor of 49.7%. The installed cost of the plant was $485.25 per kW, according to FERC data. The Ouachita plant is ranked as the 10th largest in Louisiana out of 32 plants, and 200th nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
140.9K MWh
Latest Month
3.9M MWh
Annual Generation
49.7%
Capacity Factor
CO₂ Intensity
896 lb/MWh
NOx
0.117 lb/MWh
SO₂
Steam turbine · Entergy Louisiana, LLC · Data from 2015–2024
$520/kW
Installed Cost
$2/kW
Annual CapEx
$20.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Point of Interconnection
Nearest Substation
Sterlington Substation · 500 kV
Substation Distance
0.048 km
Operator
Entergy Louisiana
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
EES.OUACH_2
Pricing Hub
LOUISIANA.HUB
Alt. Hub / Zone
MS.HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about OuachitaMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
0.005 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
47.2%
Annual Net Gen
3736 GWh
CO₂eq
897 lb/MWh
Subregion
SERC Mississippi Valley