A sleeping motorist toppled a 300-foot communications tower atop Harrison Ferry Mountain on Tuesday afternoon when he ran off the road and struck a guy wire.While no one was injured in the crash, the southern part of Warren County was without power or communication for part of Tuesday afternoon as a result of the accident. Crews from Ben Lomand Connect and Caney Fork Electric were on the scene for most of the afternoon fixing damage to their lines caused by the falling DTC Communications tower.According to a preliminary report, the tower fell after Steven Rogers Jr., 24, fell asleep behind the wheel as he was heading northbound (toward McMinnville) on Highway 8. The car ran across an open field and slammed into a guy wire.