Image, Digital

Detroit & Canada Tunnel Tunneling Operations

Digital scan of a black and white photo of a cross section diagram showing the tunneling process used in the construction of the Detroit-Windsor Tunnel. The caption below reads, "longitudinal section through tunnel heading showing construction operations, and installation of pressed steel lining." The drawing shows the main lock, the material lock, the steel bulkheads, and the clay conveyors, as well as workers digging and pushing carts loaded with clay.