c. 1915; The Detroit River Tunnel "has the unique distinction of being the only tunnel of this type built. It was constructed in sections, all work being done from the surface of the water without the use of compressed air. The tunnel is operated electrically. Construction was started October 1, 1906, and completed July 1, 1910. The length from portal to portal is 1 3/8 miles and from summit to grade 2 1/2 miles. It was built for the M.C.R.R. at a cost of $8,500,000."; shows a ferry as being "the old way" of crossing the river and the tunnel as being "the new way".; Detroit side; sign for Richard L. Aylward, Coal And Coke (Detroit) is visible.