Rodgers, Bradley APecoraro, Tiffany A2018-03-222018-03-222007-04http://hdl.handle.net/10342/6649en-USSalvage--Michigan--AlpenaUnderwater archaeology--Michigan--AlpenaShipwrecks--Michigan--AlpenaBulk carrier cargo ships--Great Lakes (North America)Inland water transportation--Great Lakes (North America)--History--19th centuryInland water transportation--Great Lakes (North America)--History--20th centuryGreat Lakes Ship Traps and Salvage: A Regional Analysis of An Archaeological PhenomenonThesis