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945.5 MW Sub. Coal operating in Marathon, WI
945.5 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
1981
Operating Since
Coordinates
44.8606, -89.6553
County
Marathon, WI
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin Public Service Corp | Wisconsin Public Service | — |
| Owner(s) | Dairyland Power Coop, Wisconsin Public Service Corp | WEC Energy Group | — |
| Status | Operating | — | — |
The Weston Generating Station, also known as the Weston Power Plant, is a base load, coal fired, electrical power station located in the villages of Rothschild and Kronenwetter in Marathon County, Wisconsin, United States. In 2009, it was listed as the fifth largest generating station in Wisconsin, with a net summer capacity of 1,076 MW. It is owned by Wisconsin Public Service, a subsidiary of WEC Energy Group.
Read more on WikipediaThe Weston plant is a 945.5 MW coal-fired power plant located in Marathon County, Wisconsin. The plant began operating in 1981 and is owned by WEC Energy Group, with Wisconsin Public Service Corp listed as the EIA operator. It utilizes conventional steam coal technology with subbituminous coal (SUB) as its primary fuel. The plant consists of two generators.
Weston operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the ReliabilityFirst Corporation (RFC) NERC region. The plant's latest annual generation was 4,842,420 MWh, resulting in a capacity factor of 58.5%. Weston is the second-largest of four coal plants in Wisconsin, and ranks 37th out of 75 coal plants nationally. Financial data indicates an installed cost of $5.22 per kW, according to FERC data.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
418.1K MWh
Latest Month
4.8M MWh
Annual Generation
58.5%
Capacity Factor
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CO₂ Intensity
1902 lb/MWh
NOx
0.533 lb/MWh
SO₂
0.308 lb/MWh
CH₄
0.232 lb/MWh
N₂O
0.034 lb/MWh
Capacity Factor
35.5%
Annual Net Gen
3431 GWh
CO₂eq
1917 lb/MWh
Subregion
MRO East
Steam turbine · Wisconsin Public Service Corporation · Data from 2016–2024
$1,812/kW
Installed Cost
$-12/kW
Annual CapEx
$33.4/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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Market Position
ISO/RTO Market
MISO
LMP Node
WPS.WESTON4
Pricing Hub
MICHIGAN.HUB
Alt. Hub / Zone
MINN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-05-31
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