Mosaic Phosphates Uncle Sam — Plant Summary
- EIA Plant ID
- 10198
- Capacity
- 26 MW
- Primary Fuel
- WH
- Technology
- All Other
- Status
- Operating
- Location
- St James, LA
- Operating Since
- 1968
- Generators
- 2
- Operator
- Mosaic Phosphates Co.
- Parent Company
- —
- Annual Generation
- 76,780 MWh
- Capacity Factor
- 33.6%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Mosaic Phosphates Uncle Sam
OperatingWaste Heat
Ranked #5 of 7 Waste Heat plants in LA#18 of 33 nationally
26 MW Waste Heat operating in St James, LA — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
26 MW
Nameplate Capacity
2
Generators
units
All Other
Technology
1968
Operating Since
Location
Coordinates
30.0399, -90.8291
County
St James, LA
Nearby Plants
- St. James Solar (LA)Solar20 MW · 11.7 km
- Vacherie Solar Energy Center, LLCSolar150 MW · 11.9 km
- Louisiana Sugar RefiningNatural Gas6.7 MW · 14.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Mosaic Phosphates Co. | — | — |
| Owner(s) | Mosaic Phosphates Co. | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Mosaic Phosphates Uncle Sam plant is a 26 MW electricity generating facility located in St. James County, Louisiana. The plant, which began operating in 1968, is owned and operated by Mosaic Phosphates Co. It utilizes waste heat (WH) as its primary fuel source and houses two generators employing "All Other" technologies. The plant operates within the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and the SERC NERC region.
In terms of generation, Mosaic Phosphates Uncle Sam produced 76,780 MWh in the latest annual reporting period, achieving a capacity factor of 33.6%. The plant holds a relatively small position in the state's power generation landscape, ranking 5th out of 6 waste heat plants in Louisiana. Nationally, it ranks 17th out of 31 similar facilities. The plant has been the subject of 9 news articles, with coverage focusing primarily on industry-related topics (8 articles) and regulatory matters (1 article).
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
34.5 kV
Regulatory Status
NR
Entity Type
Industrial
Sector
Industrial CHP
Generation
10.5K MWh
Latest Month
76.8K MWh
Annual Generation
33.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
MEDIUM confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
—
Pricing Hub
LOUISIANA.HUB
Node Source
OSM spatial match
News & Articles (10)Beta
Regulatory·federal policy
Civil Rights Case Probes Racism Behind Cancer Alley Pollution
Federal lawsuit claiming local officials illegally pushed polluting industries into Black communities reaches new stage.
DeSmog·3 days ago
Industry·corporate
Fertilizer plants add to toxic loads in Louisiana’s ‘Cancer Alley’
This is the second story in series, “The Price of Plenty.” ST. JAMES PARISH, La. — From the crest of Louisiana's Sunshine Bridge,...
Investigate Midwest·2 years ago
Industry·corporate
Fertilizer plants add to toxic loads in Louisiana’s “Cancer Alley”
ST. JAMES PARISH, La. — From the crest of Louisiana's Sunshine Bridge, the expanse of modern industry is laid out along the banks of the...
Columbia Missourian·2 years ago
General
Mosaic plant in St. James seeks to lower air permit after tests show pollution less than thought
A longstanding agricultural fertilizer production plant in western St. James Parish is asking state regulators to significantly cut its...
The Advocate·3 years ago
Last updated 2026-03-14
View all 10 articles