Eddie,
I'm not clear on exactly how far all the dirt has to be pushed. ewest said he had 1,200 yards of dirt to move 150'.
I assumed the 150' was maximum,to be moved from the far side of the new hole to a ridge. I was thinking that the minimum push would be right next to the ridge, making the push very short on that side. If all the dirt must be moved 150', then it's a much bigger job than I was thinking. I guess you could say I was thinking the average push distance would be 75', which is still a pretty far piece.
And you're so right about underestimating dirt. I try my best not to underestimate it, but end up doing so anyway.