mounds of sand and concrete debris that have been excavated are poured together with backhoe wheels

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