A barge distributes tons of armored rock on top of a confined aquatic disposal cell during the last phase of dredging at , Calif. The port, the only Navy-owned and operated deep-water port between San Diego and Washington state, is being dredged to a depth of 35 feet. Contaminated sediments are placed in the containment cell in the center of the harbor and clean sand is used to replenish a local community beach.