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In 1972, Chicago began digging 110 miles of sewer tunnel up to 300 feet down; 50 years on, the Deep Tunnel has captured more than a trillion gallons of combined sewage
1+ day, 2+ hour ago (359+ words) An aerial view of the Chicago Deep Tunnel. Image credits: Wikimedia Commons Lake Michigan, North America. Image credits: Wikimedia Commons The McCook Reservoir of the Chicago Deep Tunnel. Image credits: Wikimedia Commons Worker took a part time job after 6 months…...