Bird Diverters

Flying high across the North Dakota plains, a whooping crane’s eyes may not be able to make out the power lines in its path until it’s too late. When Minnesota Power built the Bison I wind farm within the crane’s migratory flyway in south-central North Dakota, it installed about 15,000 bird diverters on 44 miles of new and existing power lines. Bird diverters are foot-long, plastic corkscrews; attaching them to power lines makes the lines easier to see and helps the big birds avoid a collision and continue on their way. Research has shown that installing flight diverters can reduce the chance of cranes and other birds striking power lines by anywhere from 50 percent to 80 percent.

Minnesota Power’s parent company, ALLETE, has entered an agreement to be acquired by a partnership led by Canada Pension Plan Investment Board and Global Infrastructure Partners and start the process to become a private company.

This transaction will not change our operations, strategy or shared purpose and values, and it is business as usual for all of us at Minnesota Power. Learn more at