Digging resumed on ruary 2 after a WSDOT review determined that new soil monitoring practices were sufficient, allowing the machine conditional permission to bore through 1feet (m) of material and finish the initial testing phase of the machine. When Seattle decided to put in a new highway tunnel beneath the city, a machine was specially built to dig the 2-mile long, 57-foot wide project. After three years and millions of dollars in repairs, the SRtunneling machine in Seattle has resumed operations. According to Crosscut, a Seattle -based news outlet, the only way to fix the seal is to dig a shaft to reach the front of the machine , or access it through the back of the rig.
With the machine dismantled and remove we are now tracking tunnel progress on a new page. The Alaskan Way Viaduct replacement tunnel, also known as the SR Tunnel, is a bored highway tunnel in the city of Seattle , Washington, United States. The 2-mile ( km), double-decker tunnel carries a section of State Route (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north.
The repairs have to be done in situ, which means WSDOT Seattle Tunnel Partners has to dig a 120-foot hole to reach the machine. Product line available includes water jetters, cleaners, trailers and vacuum systems.

