Draining Chicago

Chapter 3 Photos, 23–44

(photos 1–22 here and 45–68 here)

North Shore Channel

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DC-Photo 3.41

A close-up view of the downstream ends of the pump tunnel formwork, August 29, 1910. The small square holes are for the shafts connecting the screw pump propellers to the gear reduction units and electrical motor. The large holes in the foreground are the pump tunnel outlets, which will be in the west wall of the pumping station and fitted with flap gates. (MWRD photo 4490)