John P Madgett — Plant Summary
- EIA Plant ID
- 4271
- Capacity
- 387 MW
- Primary Fuel
- Coal
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Buffalo, WI
- Operating Since
- 1979
- Generators
- 1
- Operator
- Dairyland Power Coop
- Parent Company
- —
- Annual Generation
- 1,283,202 MWh
- Capacity Factor
- 37.9%
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- MRO
John P Madgett
OperatingSub. Coal
Ranked #5 of 5 Sub. Coal plants in WI#71 of 103 nationally
387 MW Sub. Coal operating in Buffalo, WI — Midcontinent Independent Transmission System Operator, Inc..
EIAWD
387 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1979
Operating Since
Location
Coordinates
44.3036, -91.9126
County
Buffalo, WI
Nearby Plants
- Pepin GardenSolar0.9 MW · 6.7 km
- DIVOCSG 14 LLCSolar1 MW · 7.8 km
- MN CSG 2019-105Solar1 MW · 8.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Dairyland Power Coop | — | — |
| Owner(s) | Dairyland Power Coop | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
John P. Madgett Station is a base load, coal fired, electrical power station located in Alma, Wisconsin in Buffalo County. Owned by Dairyland Power Cooperative, the John P. Madgett Station and Alma Station are part of its "Alma site".
Read more on WikipediaThe John P. Madgett Generating Station is a 387 MW coal-fired power plant located in Buffalo County, Wisconsin. It began operating in 1979 and is owned and operated by Dairyland Power Cooperative. The plant utilizes conventional steam coal technology and subbituminous coal (SUB) as its primary fuel source. It consists of a single generator.
In the most recent year of reported data, the plant generated 1,283,202 MWh of electricity, achieving a capacity factor of 37.9%. The John P. Madgett plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and is situated in the Midwest Reliability Organization (MRO) NERC region. It is the 4th largest coal plant in Wisconsin, and ranks 60th out of 75 coal plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
161 kV
Regulatory Status
RE
Entity Type
Cooperative
Sector
Electric Utility
Generation
171.3K MWh
Latest Month
1.3M MWh
Annual Generation
37.9%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
DPC.JPM
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
EIA-860 direct report
News & Articles (5)Beta
Hazards·other
Toxic Coal Ash in Wisconsin: Addressing Coal Plants’ Hazardous Legacy
Massive quantities of toxic coal ash are stored at 14 coal-fired power plant sites in Wisconsin.
Wisconsin (other)
Earthjustice·6 months ago
Industry·corporate
Alliant Energy to retire its last coal-fired facility
Alliant Energy will retire the Columbia Energy Center by the end of 2024 — the last of its coal-fired facilities in Wisconsin.
Alliant Energy (operator)Wisconsin (other)
WisBusiness·5 years ago
Industry·corporate
Scratch one smokestack from the banks of the Mississippi
The huge twin smokestacks in Alma, Wis., not far downstream from Lake Pepin, have been a landmark along the Mississippi River since the power station was built...
MPR News·7 years ago
Hazards·other
Explosion at Dairyland Power plant: scary to some people of Alma
An explosion at a power plant in Western Wisconsin over the weekend resulted in a fire reaching 3 stories of the plant.
Dairyland Power (operator)
WEAU·8 years ago
Last updated 2026-03-14
View all 5 articles