More an underpass than a tunnel, Dalton St. runs 500ft. north/south underneath Union Terminal's approach and fountain, parallel to the station's facade. It is 3 lanes wide, with 1 northbound and 2 southbound. The walls are composed of an unusual accordion-like folding, interrupted by doors and old loading docks. Ventilation is provided by 4 unevenly placed circular grates, which are inconspicuous in the terminal's landscaping above. 2 abandoned staircases are located at each portal, which originally connected Dalton St. with the terminal's front plaza. The tunnel was completely underwater in the 1937 flood. Recently in November 2000, a gang of 70 demonstrators protesting the Transatlantic Business Dialogue being held downtown marched into the tunnel, and then were cornered by police in riot gear who blocked the entrances. There was no violence and the protesters were allowed out.
 

1. Dalton St. Tunnel Photographs

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