William A. Irvin. Original Name: William A. Irvin. Owner: City of Duluth., 1986 - present, United States, Minnesota, Duluth Builder: American Ship Building Co., 1938, United States, Ohio, Lorain Engine Builder: De Laval, 1938, United States, New York Year Built: 1938 Year Engine Built: 1938 Final Disposition: Exhibit ship at Duluth, Minnesota, 1986. Notes: Second deck of cabins on the fore part of the ship were company guest quarters for VIP's taking summer trips through the lakes. Remarks: One time flagship of the Pittsburgh fleet, nicknamed Queen of the Silver Stackers (Pittsburgh SS Co.'s smokestacks are painted silver) Registry Number: US. 237395 Hull Number: 811 Vessel Type: Bulk freighter Length: 593.2 ft. Width: 60.2 ft.. Height: 28.2 ft. Gross Tonnage: 8240 t. Net Tonnage: 6072 t. Materials: Steel Engine Type: Turbine Piston #1: 2 cyl.