Dredging and Underwater Operations

8-koi removed sediment, undisturbed soils and other debris from the MSF and dry dock areas. The operation involved divers assisted by surface supplied air. 8-koi managed the dredging and diving operations from a 150’ barge with a 230-ton capacity crane and a tugboat. The teams used a 60-foot airlift maneuvered by the crane and a 2” Hand Water Jet operated by divers for critical areas near structures, to remove the materials from the dredge area. Underground sensors were calibrated, High voltage underwater cabling and other structures were protected. Required depth was in excess of 40 feet of mllw. 8-koi removed approximately 7,000 cubic yards of materials during the dredge operations.