At 9,117 feet the Brooklyn Battery Tunnel is the longest continuous underwater vehicular tunnel in North America. The U.S. Army Corps of Engineers (USACE) dewatering team, based in Rock Island, Ill., is working closely with the Metropolitan Transit Authority (MTA) to get this vital transportation conduit back in service. The U.S. Coast Guard, U.S. Navy and private contractors are all contributing innovative solutions to speed the effort.