Plaquemine Cogeneration Plant
Natural gas power plant in Iberville Parish, Louisiana. 1,084.8 MW of nameplate capacity across 7 generators, operated by Dow Chemical Co.
Also known as Dow Plaquemine Cogeneration · EIA plant 55419
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Key facts
- Capacity
- 1,084.8 MWNameplate
- Generators
- 7 operatingEIA-860M, August 2026
- Operating since
- March 2004First generator online
- Operator
- Dow Chemical CoEIA operator ID 5347
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Iberville Parish, LA30.3217, −91.2347
- EIA plant ID
- 55419EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Plaquemine Cogeneration Plant produces
Free · EIA-923Net generation, 2025
5.75 TWh
5,754,123 MWh, final
Capacity factor, 2025
60.6%
2024: Not reported
January to July 2026
3.16 TWh
Provisional
Range, 2015 to 2025
4.3–5.8
TWh a year. Low 2015, high 2025
| 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 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | 3,535,231 | Not reported | 12 of 12 |
| 2005 | 3,818,038 | Not reported | 12 of 12 |
| 2006 | 4,196,085 | Not reported | 12 of 12 |
| 2007 | 3,698,887 | Not reported | 12 of 12 |
| 2008 | 3,520,647 | Not reported | 12 of 12 |
| 2009 | 3,855,231 | Not reported | 12 of 12 |
| 2010 | 4,432,455 | 51.3% | 12 of 12 |
| 2011 | 4,429,187 | 51.2% | 12 of 12 |
| 2012 | 5,189,388 | 59.9% | 12 of 12 |
| 2013 | 5,411,208 | 62.6% | 12 of 12 |
| 2014 | 4,585,193 | 53.0% | 12 of 12 |
| 2015 | 4,262,692 | 49.3% | 12 of 12 |
| 2016 | 4,888,223 | Not reported | 12 of 12 |
| 2017 | 4,438,492 | 51.3% | 12 of 12 |
| 2018 | 4,441,565 | 51.4% | 12 of 12 |
| 2019 | 5,341,869 | 61.8% | 12 of 12 |
| 2020 | 4,900,863 | 56.5% | 12 of 12 |
| 2021 | 4,996,202 | 57.8% | 12 of 12 |
| 2022 | 5,001,084 | 57.8% | 12 of 12 |
| 2023 | 4,969,129 | 57.5% | 12 of 12 |
| 2024 | 4,831,691 | Not reported | 12 of 12 |
| 2025 | 5,754,123 | 60.6% | 12 of 12 |
| 2026 (provisional, partial year) | 3,155,517 | 57.2% | 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
3.53M
US short tons. 2024: 3.09M
SO₂, 2025
18
US short tons
NOx, 2025
473
US short tons
CO₂ per MWh, calculated
0.61 t
About 1,226 lb per MWh
4 of 4 EPA units reported CO₂ in 2025 (500, 600, 700, 800), matched to EIA plant 55419 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
954
million gallons
Consumption, 2024
763
million gallons
Source
Mississippi River
Surface, Fresh. Induced-draft tower
Watershed stress
Very low/none · 0.199
USGS SUI, HUC12 Bayou Bourbeaux
12 of 12 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 |
|---|---|---|---|
| G500 | Natural Gas Fired Combined Cycle | 198.0 | March 2004 |
| G600 | Natural Gas Fired Combined Cycle | 198.0 | March 2004 |
| G700 | Natural Gas Fired Combined Cycle | 198.0 | March 2004 |
| G800 | Natural Gas Fired Combined Cycle | 198.0 | March 2004 |
| ST5 | Natural Gas Fired Combined Cycle | 195.0 | March 2004 |
| ST6 | Natural Gas Fired Combined Cycle | 48.9 | December 2024 |
| ST7 | Natural Gas Fired Combined Cycle | 48.9 | December 2024 |
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 Dow Chemical Co 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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Questions about Plaquemine Cogeneration Plant
How much power does Plaquemine Cogeneration Plant produce?
Plaquemine Cogeneration Plant reported 5,754,123 MWh (5.75 TWh) of net generation in 2025, a 60.6% capacity factor on 1,084.8 MW of nameplate capacity. From January to July 2026 it reported 3.16 TWh, which is provisional.
Where is Plaquemine Cogeneration Plant?
Plaquemine Cogeneration Plant is in Iberville Parish, Louisiana, at 30.3217, −91.2347. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Plaquemine Cogeneration Plant?
EIA-860M for August 2026 lists Dow Chemical Co as the operator (EIA operator ID 5347). The operator is not always the owner.
When did Plaquemine Cogeneration Plant start operating?
Its first generator began operating in March 2004, according to EIA-860M.
Does InfraMap have power prices for Plaquemine Cogeneration Plant?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Plaquemine Cogeneration Plant, 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