construction machineries on floating docks pontoon on mississippi river at Centennial Bridge in Davenport, Iowa, USA

drone view aerial of construction machineries centennial bridge in davenport iowa construction floating excavators pontoon machinery hydraulic platforms amphibious operations waterway engineering floating work platforms dredging operations excavator pontoons riverbed excavation aquatic infrastructure marine construction waterborne equipment floating plant dredge support canal excavation harbor development dock equipment hydraulic excavators pontoonmounted machinery marine dredging water project development excavation pontoons floating heavy equipment waterside development river maintenance dock construction marine excavation hydraulic dredging aquatic development marine work platform aquatic heavy machinery pontoon excavators waterway machinery river project equipment dredging platforms davenport iowa usa centennial bridge commercial dock shipbuilding boatyard harbor coastline maritime