2007.004.227
Postcard
Detroit-Windsor Tunnel
Color postcard depicting a view along the Detroit-Windsor Tunnel.
Printed on verso: The Detroit-Windsor Tunnel is 5,135 feet in length and cost $25,000,000. It required 2 ½ years to complete same. The top of the tunnel is 45 feet and the roadway 75 feet of concrete, 11,000 tons of structural and 750 tons of reinforcing steel. 20,000 granite blocks were used in building the roadway. Capacity is 2000 cars per hour.
