Oct. 22 project update: Seattle Tunnel Partners schedule update now online
Posted on Oct 22 2015 1:08 PM
Each month, Seattle Tunnel Partners submits an updated construction schedule to WSDOT. These schedules show STP’s latest projection for completing the project, in addition to listing a number of important construction activities they must complete along the way.
STP’s latest schedule (pdf 291 kb), which was posted Thursday afternoon, shows that mining will resume on Dec. 23, 2015 – one month later than the date shown in the previous schedule. Accordingly, the tunnel opening date in the new schedule also has moved by one month, to April 2018. STP has told us the changes in the schedule reflect the current emphasis on giving crews the time they need to complete the tunneling machine repairs successfully.
Like all large construction projects, the schedule for this project changes frequently. WSDOT cannot verify any of the dates shown in this schedule.
As this Oct. 14 post explains, STP has begun treating the ground north of the access pit through a process known as jet grouting. This work will stabilize the ground above the tunnel as the machine exits the pit.
Additionally, STP and manufacturer Hitachi Zosen are continuing to reconnect machine parts in preparation for mining. That work includes welding pieces together, and reconnecting hoses and wires. STP Project Manager Chris Dixon outlines the steps STP is taking to resume tunneling in this video (links to YouTube).
You can track STP’s repair effort on our time-lapse camera and follow @BerthaDigsSR99 on Twitter for updates. We’ll also continue to post photos and videos as work progresses.