This photo shows a section of the Detroit river railroad tunnel being floated down the river into position between the cities of Detroit and Windsor, Canada.

This real photo postcard was produced by Louis James Pesha. Mr. Pesha was a significant photographer of the vicinity, and produced many excellent photographs of the early 1900's. This example is one of a series he took of the construction of the detroit river tunnel in 1908.

The tunnel was constructed by pre-assembling dual tunnel sections and floating them into position. Once in posiiton, they were sunk, connected and finally, the water was pumped out to complete the tunnels.

These tunnels are still in use today, connecting the two countries of the United States and Canada.

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Below is another of Pesha's photos showing the tunnel sections being launched in preparation of floating them down to Detroit from St. Clair Michigan.