First Street Tunnel

During a storm event, the First Street Tunnel will store up to 30.3 million liters of combined sewer overflow in its 853 meters of tunnel and 4 shafts, preventing flooding in Bloomingdale and Le Droit Park.

Length
853 m 853 m
Shafts
4 4
Shaft depth
49 m 49 m

First Street Tunnel tbm in Launch Shaft