Mary, the tunnel-boring machine, is on the move again!
Thursday, Mary began boring a twin eastbound tunnel in part with the Hampton Roads Bridge-Tunnel Expansion Project.
Watch: First of 4 gantries extracted for HRBT Expansion
Watch: First of 4 gantries extracted for HRBT expansion project
HRBT's bored tunnel is only the third of its kind in the U.S.
This part of the project started at HRBT's North Island 6 months ago.
The project, once complete, will have two new twin tunnels spanning 1.5 miles.
