To properly build a road, we must first look at the soil it is to be built on. For example, Waller County has a layer of yellow clay 18 inches below the surface. Water is held in the upper layer by clay below. Excavating down to the clay then back filling with select fill is usually the best solution. Once back filling is completed, the road base is added and topped with material of owner’s choice. Other Texas counties have different soil layers so each Road is built according to the area. Knowing these types of soil and how to handle them is an engineered task.