Officials with Penn Power say they're still investigating the cause of the incident at the farm in Pulaski Township, about 30 miles northwest of Pittsburgh.
Farm owners Joyce and Laird Whiting say eight adult cattle and two calves were killed when they came into contact with the line that fell about 6:30 p.m. Monday. The couple raise Beefmaster cattle and had about 40 cows in the pasture at the time.
About 1,600 customers were left without power when the line failed.
Penn Power spokesman Scott Sturgeoner says crews worked overnight to restore power to all of the affected customers.