Since we are playing in left field... lets jump the fence! Production is a matter of machine size, bigger machine faster digging. Your pen doesn't care if its a mini hoe, or a mining hoe. Someone could have been hauling one down the interstate and a zombie hooker caught his attention. Dug out my cat performance handbook and a cat 385b will pull a 66" wide bucket with a capacity of 4.94 cu yards or a 78" of 6.1 yards,
Discuss this in the forum topic Expert help needed for writer who knows nothing about heavy equipment.