Washington Street Tunnel

The Washington Street Tunnel was the first traffic tunnel under the Chicago River. J.L. Lake was awarded the contract to construct the tunnel in July 1867 and its construction was completed January 1, 1869. This tunnel was 1605 feet long, from Franklin Street west to Clinton Street, and cost $517,000.

Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).