FARGO (AP) - A requirement that 25 percent of Minnesota's electricity come from renewable energy sources by 2025 may boost wind energy projects in North Dakota.

Some of the expansions were planned even before Gov. Tim Pawlenty signed Minnesota's new renewable energy mandate law last month.

Minnkota Power Cooperative, based in Grand Forks, plans to announce details soon for what is expected to be North Dakota's largest wind farm, near Langdon. Minnkota supplies 11 member electric cooperatives, three in North Dakota and eight in Minnesota.

David Sogard, a Minnkota's vice president, said the co-op plans to add 180 megawatts of wind-generating capacity, expecting its turbines will help meet the Minnesota mandate.

Xcel Energy, which provides electricity to Fargo and Grand Forks, is still deciding how best to meet its obligations under the mandate.

"It's my belief that it will create opportunities for North Dakota," said Mark Nisbet, Xcel's top manager in North Dakota.

Coal still provides more than 90 percent of North Dakota's electricity and about half of Minnesota's.