# Riverside Energy Center

MISO asset profile · https://askthegrid.com/assets/facilities/riverside-energy-center

Riverside Energy Center - Rock County - MISO

Riverside Energy Center is a 674.9 MW natural gas combined-cycle power plant in Rock County, Wisconsin, near Beloit, consisting of two combustion turbines and one steam turbine (CTG1, CTG2, STG1) that entered service in June 2004. The plant was built by Calpine Corporation and originally operated as an independent merchant facility before Wisconsin Power & Light Company, a subsidiary of Alliant Energy, closed on its purchase of Riverside Energy Center, LLC from Calpine in January 2013. Wisconsin Power & Light now both owns and operates the plant as part of its regulated generation fleet serving Wisconsin customers. All three generating units remain in active operation with no retirement scheduled. The facility sits within the Midcontinent Independent System Operator (MISO) footprint, consistent with Alliant Energy's balancing authority territory in southern Wisconsin. A separate, newer 650 MW combined-cycle unit known as West Riverside Energy Center was later built adjacent to the original plant and entered service in 2020, but it is a distinct generating facility from the Riverside Energy Center described here.

## Metrics

- **Nameplate capacity:** 674.9000000000001 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 55641 — plant-55641

## Facts

- **Technology:** Natural Gas Fired Combined Cycle
- **Operator:** Riverside Energy Center

## Related parties

- **Owner / operator:** Wisconsin Power and Light Company — Owner and operator of Riverside Energy Center following 2013 acquisition; subsidiary of Alliant Energy Corporation. ([source](https://www.alliantenergy.com/))
- **Parent company:** Alliant Energy Corporation — Parent company of Wisconsin Power & Light Company, a wholly-owned subsidiary. ([source](https://www.alliantenergy.com/))
- **Balancing authority / market operator:** Midcontinent Independent System Operator, Inc. (MISO) — ISO/RTO balancing authority and market operator for Riverside Energy Center. ([source](https://www.misoenergy.org/))

## Sources

- [datcp.wi.gov](https://datcp.wi.gov/Documents/AISRiversideElectric.pdf) — datcp.wi.gov · authoritative — Source retained for exact-record publication review.
- [dnr.wisconsin.gov](https://dnr.wisconsin.gov/sites/default/files/topic/Wastewater/amwqt/WQTPlanWPLRiverside.pdf) — dnr.wisconsin.gov · authoritative — Source retained for exact-record publication review.
- [investors.alliantenergy.com](https://investors.alliantenergy.com/News--Presentations/news/news-details/2013/Wisconsin-Power-and-Light-closes-on-purchase-of-Riverside-Energy-Center/default.aspx) — investors.alliantenergy.com · public_source — Source retained for exact-record publication review.
- [mbrweb.ferc.gov](https://mbrweb.ferc.gov/SearchMBRAssetAppendix/AssetAppendixDetails?AssetAppendixId=3853) — mbrweb.ferc.gov · authoritative — Source retained for exact-record publication review.
- [naturalgasintel.com](https://naturalgasintel.com/news/industry-briefs-1581/) — naturalgasintel.com · public_source — Source retained for exact-record publication review.
- [alliantenergy.com](https://www.alliantenergy.com/news/news-center/2024/03/032224-2023iqairreportbeloitstatement) — alliantenergy.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/riverside-energy-center
Website: [Wisconsin Power & Light Co (Alliant Energy)](https://www.alliantenergy.com/our-energy/natural-gas/riverside)

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