Preparing the ground for our new sprinkler system

Bill spend friday and saturday excavating the yard and getting it ready to put in the sprinkler system. We are having a company come and do it, it is too much yard for Bill to do. Bill worked prior on killing the weeds and then leveling the ground he did a good job driving the tractor. I was recuperating in the house, did alot of reading and watching T.V to pass time.