isolate mounds of sand and concrete debris that have been excavated and poured together

environment nature yellow agriculture background backhoe brown bulldozer concrete construction development digger dirt dry dune earth earthworks geology gravel ground heap heavy hill industrial industry isolated land large loader mound mountains natural organic pile push road rut sand soil space stack stone surface texture top traces tractor wheel print isolate mounds debris excavated poured together prepare materials filling repairing roads rural thailand season