Wish I had pics today, there is an outfit west of town that is cutting through a hill to get to a low spot. 

They had a hoe digging a path with atleast a D6 cat in the trench to make a road to get the tile deep enough to drain the other side.  The top of cab on D6 was over 3 feet below surface of hill.  looks like their digging in a oil pipe line instead of a tile line!!!! lol