For three years, "Chris" has been digging a five-mile long tunnel, 100 feet below the surface of D.C.
https://www.wjla.com/news/local/a-huge-machine-just-spent-3-years-underneath-dc-digging-a-5-mile-long-tunnel-heres-why
For three years, "Chris" has been digging a five-mile long tunnel, 100 feet below the surface of D. C. Now it’s time for him to emerge. Chris the Tunnel Boring Machine has now finished excavating the Northeast Boundary Tunnel, a DC Water...
https://www.wjla.com/news/local/a-huge-machine-just-spent-3-years-underneath-dc-digging-a-5-mile-long-tunnel-heres-why
A huge machine just spent 3 years underneath DC digging a 5-mile long tunnel. Here's why.
www.wjla.comFor three years, "Chris" has been digging a five-mile long tunnel, 100 feet below the surface of D. C. Now it’s time for him to emerge. Chris the Tunnel Boring Machine has now finished excavating the Northeast Boundary Tunnel, a DC Water...