PORT HURON, Mich. - Cmdr. Gary Koehler, incident commander with U.S. Coast Guard, discusses operations with Bill Hazel, Director of Marine Services at Marine Pollution Control during the Arthur J salvage operation of a 100-foot sunken dredge approximately two miles off of Lakeport, Sunday, July 29, 2012. U.S. Coast Guard photo by Petty Officer 1st Class Matthew Schofield.