McKim & Creed used hydrographic surveying, aerial mapping, terrestrial scanning and conventional surveying to assist the U.S. Army Corps of Engineers New York District (USACE NYD) with the Troy Lock Bulkhead Recess Rehabilitation Project. Utilizing these methods, our team collected a survey-grade lidar point cloud and detailed photographs to produce a 3D model of the lock above and below the water surface. The collected lidar facilitated the creation of a CAD model detailing concrete structures, buildings, floor grates, vaults, and bulkhead recesses. The team provided the data in a web-based “walk-through” allowing engineers to virtually immerse themselves in the site.