A 25-foot response boat crew from Station Rio Vista ensures containment boom is positioned correctly around a partially sunken 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.