# Weston

MISO asset profile · https://askthegrid.com/assets/facilities/weston

Wisconsin Public Service Corporation - Marathon County - MISO

Weston Power Plant is a coal-fired power station in the villages of Rothschild and Kronenwetter, Marathon County, Wisconsin, along the Wisconsin River near Wausau. It currently has two operating units, Unit 3 (350.5 MW, online since 1981) and Unit 4 (595 MW, online since 2008), for a combined nameplate capacity of 945.5 MW. Unit 4 is jointly owned, with Wisconsin Public Service Corporation (WPS) holding 70% and Dairyland Power Cooperative of La Crosse holding 30%; WPS, a subsidiary of WEC Energy Group, operates the entire site. Two older units, Weston 1 and 2, along with two smaller peaking units, were retired in 2015 and 2023 and have since been demolished. WEC Energy Group has announced plans to retire Unit 3 in 2031 and convert Unit 4 to burn natural gas as part of a company-wide exit from coal use by the end of 2032, though the utility has not yet filed the Unit 4 gas-conversion project with Wisconsin regulators and critics note the company's retirement dates have slipped before. The plant sells its output into MISO, settling near the WPS.WESTON3 and WPS.WESTON4 nodes.

## Metrics

- **Nameplate capacity:** 945.5 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 4078 — plant-4078

## Facts

- **Technology:** Conventional Steam Coal
- **Operator:** Wisconsin Public Service Corporation

## Related parties

- **Owner:** Dairyland Power Cooperative — 30% co-owner of Unit 4
- **Parent company:** WEC Energy Group, Inc. — Parent company of WPS
- **Acquirer:** Wisconsin Electric Power Company — Proposed acquirer of Dairyland's Unit 4 stake
- **Balancing authority / market operator:** Midcontinent Independent System Operator (MISO) — Grid operator and balancing authority
- **EPC contractor / construction contractor / equipment supplier:** Babcock & Wilcox — Boiler supplier and EPC contractor ([source](https://www.babcock.com/home/about/resources/success-stories/weston-unit-4))
- **Equipment supplier:** Toshiba International Corp. — Steam-turbine supplier ([source](https://toshiba.com/taes/products/steam-turbine-generator))
- **Equipment supplier:** General Electric Power — Unit 3 turbine, boiler, and generator supplier ([source](https://www.gevernova.com/gas-power/products/steam-turbines))
- **Construction contractor:** Miron Construction Co., Inc. — Construction contractor ([source](https://miron-construction.com/project/wps-weston-3-react))

## Sources

- [apps.psc.wi.gov](https://apps.psc.wi.gov/ERF/ERFview/viewdoc.aspx?docid=%20566895) — apps.psc.wi.gov · authoritative — Source retained for exact-record publication review.
- [miron-construction.com](https://miron-construction.com/project/wps-weston-3-react) — miron-construction.com · public_source — Source retained for exact-record publication review.
- [s22.q4cdn.com](https://s22.q4cdn.com/994559668/files/doc_presentations/2025/Jun/25/06-2025-June-Final.pdf) — s22.q4cdn.com · public_source — Source retained for exact-record publication review.
- [toshiba.com](https://toshiba.com/taes/products/steam-turbine-generator) — toshiba.com · public_source — Source retained for exact-record publication review.
- [babcock.com](https://www.babcock.com/assets/PDF-Downloads/Success-Stories/PCH-571_Weston-Supercritical-Boiler.pdf) — babcock.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/weston
Website: [Wisconsin Public Service Corporation (WEC Energy Group); Dairyland Power Cooperative co-owns 30% of Unit 4](https://www.wisconsinpublicservice.com/company/weston)

Source: Ask the Grid — https://askthegrid.com/