Blog Archive

When one of your major sewer lines runs through the Potomac River, a backhoe and trencher won't do. That's why we've got helicopters carrying a 14-ton drill and workers suspended midair over the Potomac.
Upcoming Meeting
April 24, 2023
Monday 9:00 AM
Her name is Mary and she’s a tunnel boring machine (TBM) capable of cutting through hard rock and boring a tunnel 21 feet in width.