Soo Line (Arcola) High Bridge on the St. Croix River under construction in 1910 Under construction in 1910. Photo courtesy Minnesota Historical Society. Post author By Greg Post date June 2, 2011 No Comments on Soo Line (Arcola) High Bridge on the St. Croix River under construction in 1910 Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Notify me of new posts by email.