The Town of Chatham hired Coastal Engineering to provide hydrographic surveying and engineering services for the dredging of Old Mill Boat Yard. The goal of the project was to provide a deeper depth for vessels docked at the Old Mill Boat Yard facility. Coastal Engineering’s role in the project was to conduct a pre-dredge hydrographic survey of the designated dredge area to determine the cubic yardage of sediment that would be dredged, and to conduct post-dredge surveys to determine if the dredge contractor was able to reach the design depth and calculated the volume that was dredged. Coastal Engineering also prepared pre-dredge and post dredge plans to show the contours before and after dredging was completed. The hydrographic survey was completed using the Coastal Engineering survey vessel equipped with a single beam transducer, digital fathometer, and RTK GPS antenna. Grades underneath the floating dock located in the middle of the dredge area were determined by Coastal Engineering’s divers.