Gov. Jim Doyleâ??s “risky” $251 million plan to overhaul a UW-Madison power plant seems a better bet these days after a large collection of state businesses have stepped forward with eco-friendly proposals for running it. Doyleâ??s office announced Monday that 59 businesses responded to his request for information on powering the Charter Street Heating Plant through a combination of natural gas and fuel derived from wood and agricultural waste.