Image, Digital

Digital scan of a black and white photo of an architectural drawing showing both an overhead view of the path of the Detroit-Windsor Tunnel, and cross sections of the tunnel segments, and their surrounding trench. The top view labels the tunnel, ventilation buildings, portals, surrounding streets, the harbor lines, and the international boundary lines. The cross section labels the roadway, exhaust air ducts, the fresh air duct, the sidewalk, the steel shell, the ballast concrete, the trench, and the backfill.