You need to make sure that you excavate around the timber pile heads enough, so that when your pile subcontractor comes back to the site to cutoff the pile heads, they will have room to work. This excavation will need to be a fine excavation around the pile heads. A crew of 2-3 labor will be able to finish this fine grading around pile heads in a day, for roughly 100 piles, assuming that the rough grading was done good enough.