The Arkansas » Fremont County » Cañon City » Colorado » 4th Street Bridge 4th Street Bridge Details 1891, Bullen Bridge Company. 4th St. (NR) A venerable crossing of the Arkansas River built by a Pueblo company, this all-steel truss bridge with cantilevered wooden sidewalks leads to the old South Cañon City residential neighborhood and some notable nineteenth-century houses. Writing Credits Author: Thomas J. Noel