Feb. 20 update: Tidying up the access pit

Posted on Feb 20 2015 4:51 PM
After a few days of steady digging, Seattle Tunnel Partners is taking a break from mining so crews can clean out the bottom of the access pit. As expected, a mixture of dirt, concrete and water came into the pit along with the tunneling machine during Thursday’s breakthrough. Crews are using vacuum trucks and other tools to remove the material. 
 
Once Bertha’s cradle is cleaned off, crews will continue moving the machine forward. Bertha must travel an additional 35 feet before STP and manufacturer Hitachi Zosen can begin the disassembly process. Since mining resumed late Tuesday, Bertha has moved nearly 22 feet.
 

Repair plan resources:

 

Previous updates

Feb. 19, 2015 morning update - Bertha approaching the pit

Feb. 18, 2015 afternoon update - Bertha digs on

Feb. 18, 2015 project update - Bertha on the move

Feb. 13, 2015 project update - Safety at the forefront

Feb. 13, 2015 project update - Long-term traffic impacts on SR 99: lane closure begins March 7 through late May

Feb. 12, 2015 - Incident at tunnel's north portal work zone

Feb. 9, 2015 project update - Cradle awaits Bertha's front end

Archive of previous updates