A U.S.-flagged bulk carrier is being built in the Great Lakes region for the first time since 1983. Fincantieri Bay Shipbuilding of Sturgeon Bay, Wis., is midway through the two-year project for Interlake Steamship Co., based in Middleburg Heights, Ohio. Among its cargoes, the River-class self-unloading ship is anticipated to carry iron ore from Minnesota’s Mesabi Range to a Burns…