Welcome to the Soo Line Historical and Technical Society's Website! Sign up for Bridges, Boats and Brewing SLHTS convention in Manitowoc, WI! Thursday, Sept 9, through Sunday Sept. 12, 2021 We need your reservations now to assure a sucessful convention. 2021 Convention Registration Form Mantiowoc, 1964. Photo by John Ingles, collection of Greg Mross copyright Soo Line Historical and Technical Society