Xcel

At the time, the Prairie Island facility was limited to storing 17 casks, a limit that has since been increased, although Xcel is required by the Minnesota Legislature to pay the local American Indian tribe $1–2 million each year and explore renewable energy.
Xcel Energy utilizes a transmission systems with lines that carry 115,000 volts, 230,000 volts, and 345,000 volts. Xcel also has a 500,000 volt transmission line that runs from Winnipeg, Manitoba in Canada to Chisago County just north of St.

Paul, Minnesota.
Xcel Energy customers in Colorado, Minnesota, and New Mexico can purchase wind power through a program known as "Windsource". Customers can elect to pay an extra amount on their monthly utility bills, directing the company to use or purchase more energy from wind farms.This can be done in "blocks" of 100 kilowatt-hours ($2–3 per), or the entire amount of energy can come from wind. As of May 1, 2004, the company had 829 megawatts of generating capacity from wind power spread across five states.

This is about 5% of the company's total generating capacity, which is roughly 15,500 megawatts.
Several coal-fired generating plants owned by Xcel Energy are being converted to run on natural gas, which produces fewer emissions.
History
Xcel Energy was formed as a holding company to own three formerly independent companies: Northern States Power (Minnesota), Wisconsin Electric Power (Wisconsin), and New Century Energies. (now the Grand Forks division), and Union Heat Light & Power Co.Cloud).
Xcel briefly owned the then-financially troubled NRG Energy in the early 2000s, roughly doubling the size of the company in terms of employees and generating capacity.