Navigational Improvement Project involved deepening the harbor to 38 ft. New work dredging totaled 2,877,500 yd³ this work was performed by clamshell dredges using environmental buckets, with offshore disposal at the San Francisco Ocean Disposal Site via the company's 7,200- yd³-capacity dump barges. Tight environmental requirements applied with respect to the towing and disposal of dredged materials. GLD&D made 470 disposal trips to the SF-DODS with no misplaced materials, far exceeding the performance record of any dredging contractor prior to or since this project.