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The Economic Times
economictimes.indiatimes.com > news > international > us > 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 > articleshow > 133506522.cms

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…...