We are not only looking for water. We are mainly looking for the rock that produces water. The depth of each layer of rock depends greatly on the location and elevation of the drill site. The formations are relatively flat below the surface. However, they may not be level. We use a gps to tell us the elevation of your drill site and we survey the area wells that we have drilled and compare their elevations. From this, we can estimate the depth that your well will need to be. However, we have found out on many occasions, that when God laid the foundations of the earth, He followed no rules. It is not uncommon to see formations rise or fall several hundred feet in a mile. For instance, we drill in one subdivision where the depth to the lower trinity is 760’ on one side of the road, and 840’ on the other. We can never be sure about the depth of your well until we actually drill.