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57.5 MW Wood Waste operating in Marathon, WI
57.5 MW
Nameplate Capacity
1
Generators
unit
Wood/Wood Waste Biomass
Technology
2013
Operating Since
Coordinates
44.8881, -89.6294
County
Marathon, WI
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wisconsin Electric Power Co | Wisconsin Electric Power | — |
| Owner(s) | Wisconsin Electric Power Co | WEC Energy Group | — |
| Status | Operating | operating | — |
The Rothschild Biomass Cogen Facility is a 57.5 MW biomass-fueled power plant located in Marathon County, Wisconsin. The plant began operating in 2013 and has one generator utilizing wood/wood waste biomass technology. It is owned by WEC Energy Group and operated by Wisconsin Electric Power Co. The plant is interconnected to the Midcontinent Independent Transmission System Operator, Inc. (MISO) balancing authority and is within the ReliabilityFirst Corporation (RFC) NERC region.
In its most recent year of operation, the Rothschild Biomass Cogen Facility generated 152,764 MWh of electricity, resulting in a capacity factor of 30.3%. The plant is ranked as the second-largest of two biomass plants in Wisconsin, and the 16th largest of 97 biomass plants nationally. Financial data indicates an installed cost of $5,498.28 per kW, according to FERC filings.
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
46.0 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.
15.3K MWh
Latest Month
152.8K MWh
Annual Generation
30.3%
Capacity Factor
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CO₂ Intensity
23 lb/MWh
NOx
0.449 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.404 lb/MWh
N₂O
0.053 lb/MWh
Capacity Factor
28.4%
Annual Net Gen
143 GWh
CO₂eq
49 lb/MWh
Subregion
MRO East
Steam turbine · Wisconsin Electric Power Company · Data from 2015–2024
$5,210/kW
Installed Cost
$3/kW
Annual CapEx
$116.0/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
MISO
LMP Node
WEC.RBC1
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 2026-03-26
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