Wisconsin Power and Light Co. to buy 600 MW gas-fired plant

Riverside is a 600 MW combined cycle natural gas-fired electric generating facility located in Beloit, Wisconsin. It began operation in 2004

Madison, Wis. and Houston, May 18, 2012 — Wisconsin Power and Light Co., a unit of Alliant Energy Corp., is exercising its option to purchase the Riverside Energy Center from Calpine Corp.

Riverside is a 600 MW combined cycle natural gas-fired electric generating facility located in Beloit, Wisconsin. It began operation in 2004.

WPL currently has a purchase power agreement for about 500 MW from Riverside. Under that agreement, WPL has the option to purchase Riverside if it exercises the option on or before May 31, 2012.

The Public Service Commission of Wisconsin approved the nearly $392 million purchase last month. The purchase is subject to approval from the Federal Energy Regulatory Commission (FERC) and under the Hart-Scott-Rodino Act.

WPL expects to close this purchase by December 31, 2012.

The utility, based in Madison, Wis., provides electric service to about 459,000 customers in more than 600 communities across central and southern Wisconsin.

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