Times West Virginian 2 hrs ago Mon Power expects to clear vegetation from nearly 5,700 miles of power lines as part of its 2021 tree trimming program. SUBMITTED PHOTO FAIRMONT â Mon Power, a subsidiary of FirstEnergy Corp., expects to clear vegetation from around nearly 5,700 miles of power lines as part of its 2021 tree trimming program. Maintaining proper clearances and removing dead or diseased trees around electrical equipment can help reduce the frequency and duration of power outages, especially those associated with severe weather. Clearing incompatible vegetation under power lines also results in easier access for company personnel to inspect and maintain lines and make repairs faster if an outage occurs.