Construction requires imposing straight lines on nature - a place where straight lines are rarely found. The first part of any construction is prepping the ground - taking nature and leveling it for the building process. Now think about this - rocks, holes, different dirt textures and types, hill, valleys. These all need to be made straight and stable in order to build. The excavator is that guy. They must be flexible (nature-side) and logical (construction-side) with a good eye on the whole of the project to make sure that it is being set up right. They are the first ones in.

Bob proved his flexibility. With the change in the lifting plan, he thought for a minute then went "Ok, guess we'll do this." With all the changes from the first concrete contractor, he just rolled with it. At one point he did say with the ever so slightest edge, "Yeah, I'd like to get done with this project." Nice one.