Have you ever heard of the Big Muskie .It was a drag line shovel in Ohio.It was powered by 13,800 volts supplied by a trailing cable. Built in 1969. It moved 483 milion cubic yards of rock and earth. It could move 325 tons of earth and rock in a single bite. The bucket held 220 yards. Just a very interesting piece of our history. It was used to mine coal in Ohio.