BISMARCK, N.D. (AP) -- Bismarck-based Montana-Dakota Utilities Co. has signed an agreement to buy electricity from a wind farm being built in southwestern North Dakota.
The division of MDU Resources Group Inc. says it has signed a 25-year deal to buy power from Thunder Spirit Wind LLC, a subsidiary of Wind Works Power Corp.
The state Public Service Commission earlier this month approved plans for the $300 million wind farm in Adams County. Construction is to begin late this year or early next year, with the wind farm of up to 75 turbines becoming operational in late 2015.
MDU says the agreement with Thunder Spirit Wind means 20 percent of its energy supply requirements will come from renewable sources.