31 23 00 Excavation and Fill 31 20 00 Earth Moving 31 00 00 Earthwork 31 10 00 Site Clearing 33 10 00 Water Utilities 33 05 13 Manholes and Structures 31 60 00 Special Foundations and Load-Bearing Elements 33 40 00 Storm Drainage Utilities 33 41 00 Storm Utility Drainage Piping 33 30 00 Sanitary Sewerage Utilities