Ouachita
Natural gas power plant in Ouachita Parish, Louisiana. 903.9 MW of nameplate capacity across 6 generators, operated by Entergy Louisiana LLC.
Also known as Ouachita Power Station · EIA plant 55467
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 903.9 MWNameplate
- Generators
- 6 operatingEIA-860M, August 2026
- Operating since
- August 2002First generator online
- Operator
- Entergy Louisiana LLCEIA operator ID 11241
- Grid
- MISOBalancing authority MISO
- Price nodes
- 3 MISO nodesResource nodes with prices
- Location
- Ouachita Parish, LA32.7061, −92.0683
- EIA plant ID
- 55467EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Ouachita produces
Free · EIA-923Net generation, 2025
3.94 TWh
3,944,657 MWh, final
Capacity factor, 2025
49.8%
2024: 67.4%
January to July 2026
2.62 TWh
Provisional
Range, 2015 to 2025
2.7–4.7
TWh a year. Low 2021, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 831,620 | Not reported | 8 of 12 |
| 2003 | 1,514,435 | Not reported | 12 of 12 |
| 2004 | 349,075 | Not reported | 12 of 12 |
| 2005 | 553,933 | Not reported | 12 of 12 |
| 2006 | 1,284,787 | Not reported | 12 of 12 |
| 2007 | 1,597,177 | Not reported | 12 of 12 |
| 2008 | 1,402,834 | Not reported | 12 of 12 |
| 2009 | 871,942 | Not reported | 12 of 12 |
| 2010 | 1,129,344 | 14.3% | 12 of 12 |
| 2011 | 1,313,370 | 16.6% | 12 of 12 |
| 2012 | 1,658,025 | 20.9% | 12 of 12 |
| 2013 | 1,389,108 | Not reported | 12 of 12 |
| 2014 | 3,640,642 | 46.0% | 12 of 12 |
| 2015 | 4,685,606 | 59.2% | 12 of 12 |
| 2016 | 3,902,978 | 49.2% | 12 of 12 |
| 2017 | 4,160,061 | 52.5% | 12 of 12 |
| 2018 | 4,009,907 | 50.6% | 12 of 12 |
| 2019 | 3,595,463 | 45.4% | 12 of 12 |
| 2020 | 3,506,355 | 44.2% | 12 of 12 |
| 2021 | 2,739,761 | 34.6% | 12 of 12 |
| 2022 | 4,239,148 | 53.5% | 12 of 12 |
| 2023 | 3,736,012 | 47.2% | 12 of 12 |
| 2024 | 4,897,983 | 67.4% | 11 of 12 |
| 2025 | 3,944,657 | 49.8% | 12 of 12 |
| 2026 (provisional, partial year) | 2,618,091 | 56.9% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDCO₂, 2025
1.79M
US short tons. 2024: 2.40M
SO₂, 2025
9
US short tons
NOx, 2025
238
US short tons
CO₂ per MWh, calculated
0.45 t
About 906 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (CTGEN1, CTGEN2, CTGEN3), matched to EIA plant 55467 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
1,460
million gallons
Consumption, 2024
1,118
million gallons
Source
Ouachita River
Surface, Fresh. Induced-draft tower
Watershed stress
Low · 0.239
USGS SUI, HUC12 Black Bayou Lake-Bayou De Siard
36 of 36 cooling months report withdrawal. SUI of the source river HUC12 within 3 km. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | 179.3 | August 2002 |
| CTG2 | Natural Gas Fired Combined Cycle | 179.3 | August 2002 |
| CTG3 | Natural Gas Fired Combined Cycle | 179.3 | August 2002 |
| STG1 | Natural Gas Fired Combined Cycle | 122.0 | August 2002 |
| STG2 | Natural Gas Fired Combined Cycle | 122.0 | August 2002 |
| STG3 | Natural Gas Fired Combined Cycle | 122.0 | August 2002 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Entergy Louisiana LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Ouachita
More plants operated by Entergy Louisiana LLC
Questions about Ouachita
How much power does Ouachita produce?
Ouachita reported 3,944,657 MWh (3.94 TWh) of net generation in 2025, a 49.8% capacity factor on 903.9 MW of nameplate capacity. From January to July 2026 it reported 2.62 TWh, which is provisional.
Where is Ouachita?
Ouachita is in Ouachita Parish, Louisiana, at 32.7061, −92.0683. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Ouachita?
EIA-860M for August 2026 lists Entergy Louisiana LLC as the operator (EIA operator ID 11241). The operator is not always the owner.
When did Ouachita start operating?
Its first generator began operating in August 2002, according to EIA-860M.
Does InfraMap have power prices for Ouachita?
Yes. InfraMap has MISO day-ahead and real-time prices at 3 price nodes linked to Ouachita, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page