Riverside Energy Center is an electrical power station located north of Beloit, Wisconsin in the Town of Beloit, just west of the Rock River.

Riverside is a 603 MW combined cycle natural gas facility built by Calpine.

[3] In November 2014, Alliant announced it planned to expand Riverside Energy Center with an additional $725 million, 650 MW, combined cycle natural gas generating facility.

Alliant said they planned to begin construction in 2016 and be producing power in 2019.

[4] There is an Alliant maintenance facility located adjacent to the center[5] as well as the Rock River Generating Station, a natural gas-fired power plant.