Jan. 13 update: Filling in shaft number three

Posted on Jan 13 2014 5:15 PM

Today, crews filled in the third of three shafts drilled last week in front of Bertha, the SR 99 tunneling machine. The shafts were drilled to further identify the limits of any metal in front of the machine and remove as much of it as possible.  Plans to drill a fourth shaft have been put on hold as crews prepare to perform an inspection within the machine’s excavation chamber.

Crews are also continuing to change cutting tools and perform other maintenance within the machine.

Previous updates

Jan. 10, 2014 update -- Exploratory shaft work continues

Jan. 9, 2014 update -- Still too early to talk timeline 

Jan. 8, 2014 update -- Crews continue drilling exploratory shafts

Jan. 7, 2014 update -- Crews begin drilling shafts in front of Bertha

Jan. 3, 2014 update -- Progress made in search for tunnel blockage