John P Madgett
Coal power plant in Buffalo County, Wisconsin. 387 MW of nameplate capacity across 1 generator, operated by Dairyland Power Coop.
Also known as John P Madgett Station · EIA plant 4271
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Key facts
- Capacity
- 387 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- November 1979First generator online
- Operator
- Dairyland Power CoopEIA operator ID 4716
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Buffalo County, WI44.3036, −91.9126
- EIA plant ID
- 4271EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power John P Madgett produces
Free · EIA-923Net generation, 2025
1.28 TWh
1,283,202 MWh, final
Capacity factor, 2025
37.9%
2024: 26.9%
January to July 2026
467 GWh
Provisional
Range, 2015 to 2025
0.9–1.8
TWh a year. Low 2024, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 2,185,090 | Not reported | 12 of 12 |
| 2001 | 2,310,619 | Not reported | 12 of 12 |
| 2002 | 2,097,984 | Not reported | 12 of 12 |
| 2003 | 2,306,944 | Not reported | 12 of 12 |
| 2004 | 2,075,613 | Not reported | 12 of 12 |
| 2005 | 2,511,359 | Not reported | 12 of 12 |
| 2006 | 2,377,632 | Not reported | 12 of 12 |
| 2007 | 2,483,789 | Not reported | 12 of 12 |
| 2008 | 2,620,801 | Not reported | 12 of 12 |
| 2009 | 2,483,132 | Not reported | 12 of 12 |
| 2010 | 2,035,221 | 60.0% | 12 of 12 |
| 2011 | 1,978,856 | 58.4% | 12 of 12 |
| 2012 | 1,932,549 | 56.8% | 12 of 12 |
| 2013 | 2,453,238 | 72.4% | 12 of 12 |
| 2014 | 1,383,643 | 40.8% | 12 of 12 |
| 2015 | 1,502,812 | 44.3% | 12 of 12 |
| 2016 | 1,786,971 | 52.6% | 12 of 12 |
| 2017 | 1,532,472 | 45.2% | 12 of 12 |
| 2018 | 138,262 | 48.0% | 1 of 12 |
| 2019 | 136,790 | 47.5% | 1 of 12 |
| 2020 | 1,426,801 | 42.0% | 12 of 12 |
| 2021 | 1,721,629 | 50.8% | 12 of 12 |
| 2022 | 481,710 | 56.4% | 3 of 12 |
| 2023 | 1,249,276 | 36.9% | 12 of 12 |
| 2024 | 914,277 | 26.9% | 12 of 12 |
| 2025 | 1,283,202 | 37.9% | 12 of 12 |
| 2026 (provisional, partial year) | 467,435 | 23.7% | 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
1.82M
US short tons. 2024: 1.39M
SO₂, 2025
704
US short tons
NOx, 2025
660
US short tons
CO₂ per MWh, calculated
1.42 t
About 2,835 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (B1), matched to EIA plant 4271 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
114,180
million gallons
Consumption, 2024
0
million gallons
Source
Mississippi River
Surface, Fresh. Once-through
Watershed stress
Very low/none · 0.188
USGS SUI, HUC12 City of Buffalo City-Mississippi River
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 |
|---|---|---|---|
| 1 | Conventional Steam Coal | 387.0 | November 1979 |
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 Dairyland Power Coop 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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Power plants near John P Madgett
More plants operated by Dairyland Power Coop
Questions about John P Madgett
How much power does John P Madgett produce?
John P Madgett reported 1,283,202 MWh (1.28 TWh) of net generation in 2025, a 37.9% capacity factor on 387 MW of nameplate capacity. From January to July 2026 it reported 467 GWh, which is provisional.
Where is John P Madgett?
John P Madgett is in Buffalo County, Wisconsin, at 44.3036, −91.9127. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates John P Madgett?
EIA-860M for August 2026 lists Dairyland Power Coop as the operator (EIA operator ID 4716). The operator is not always the owner.
When did John P Madgett start operating?
Its first generator began operating in November 1979, according to EIA-860M.
Does InfraMap have power prices for John P Madgett?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to John P Madgett, 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