Nessel has been attempting through the courts to permanently shut down the portion of the 67-year-old Line 5 that passes across the Straits' lakebed, fearing any leak would pollute the Great Lakes.

American Electric Power Company Inc's <AEP.O> Indiana Michigan Power said on Monday it suspended service from its 1,168 megawatt (MW) Donald C. Cook Nuclear Plant's Unit 2 reactor due to a trip.