This feature class represents privately owned coastal protection structures for the Massachusetts shoreline. Only the ocean-facing shoreline was included in this project area, covering approximately 1,100 miles. The coastal protection structures included in the inventory were bulkhead/seawalls, revetments, groins, and sandbags. Structures were digitized using a heads-up approach based on a combination of aerial imagery and oblique aerial imagery covering the project area. Structure length and material was also determined this way. Elevations were assigned using LiDAR data. The feature class structure was designed to match the database of previous phases of the Massachusetts Coastal Infrastructure Inventory and Assessment project.