Bob,
Your right, each push is gonna be a different length. Also dirt pushes different each time. Sometimes you fight it, other times it's like sand. There is also the matter of building up a slot to keep the blade full. The variables will affect the amount of time each push takes. Also spreading it will eat of time. I used ten minutes for simple math, but also because it's areasonable amount of time to push a load of dirt, spread it, back up and get another load.
My goal in that post was just to dramatize how long it takes to push dirt and how the prices come out. $500 for 1,200 yards isn't realistic. It will cost more than that in fuel alone in my dozer.
Eddie
