ANTIOCH, Calif. - U.S. Coast Guard Petty Officer 2nd Class Lucas Martin, a marine science technician stationed at Coast Guard Sector San Francisco, speaks with Eric Imhof, the senior planner Emergency Services Division of the Office of the Contra Costa County Sheriff, regarding the partial sinking of a barge June 10, 2010. Coast Guard members from the Coast Guard Sector San Francisco Incident Management Team and Station Rio Vista, as well as, state and local agencies responded to the 153-foot sunken dredge barge Headway in the Antioch Shipyard. U.S. Coast Guard photo Petty Officer 3rd Class Erik Swanson.