Blame new mandates from the Environmental Protection Agency and a new gas powered generating station for a higher electricity bill.
Beginning October 1st, Black Hills Power customers will see up to a 36 cent per day increase on their bills.
The increase coincides with the opening of the new natural gas powered Cheyenne Prairie Generating Station.
Black Hills Power recently closed it's 3 coal powered plants, including the Ben French station in Rapid City due to changing EPA regulations.
Despite the rising costs, Black Hills Power Vice President of Operations Vance Crocker says customers can still power their homes daily for less than the cost of a gallon of gasoline, "Black Hills Power does work hard to control costs while providing safe, reliable service. We still think that electricity is a very good value".
All the more than 66,000 customers could see a rate increase of $130 more per year.