Excavation & Backfill Materials Sand – Sand Dunes, Sweet Sand, Thermal Sand Marl /Marlstone Sub-Base, Base Course Aggregates (3/8″, 1/2″ ¾” ,1″,1.5″, 2″)Different types of Gravels, Riprap/Rock Armor AggregateSub BaseSub BaseSelect FillMarlMarlGeneral FillJCB GraderBase Course Previous Next