35 00 00 Waterway and Marine Construction
35 01 00 Operation and Maintenance of Waterway and Marine Construction
35 01 30Operation and Maintenance of Coastal Construction35 01 40Operation and Maintenance of Waterway Construction35 01 40.51Waterway Dredging35 01 40.92Preservation of Water Courses35 01 50Operation and Maintenance of Marine Construction35 01 50.51Marine Dredging35 01 50.71Channel Excavation, Cleaning and Deepening35 01 70Operation and Maintenance of Dams