Meet ‘Chris,’ the tunnel-boring machine going to work in Northeast DC

Tunnel-boring machine "Chris" was lowered underground Thursday. The behemoth will spend the next two and a half years slowly chewing through more than 5 miles of earth underneath Northeast D.C. to make way for a sewer tunnel. 

https://wtop.com/dc/2018/07/meet-chris-the-tunnel-boring-machine-going-to-work-in-northeast-dc/slide/1/