Feb. 14 update: Repair plan to be finalized by the end of February

Posted on Feb 14 2014 12:49 PM

Seattle Tunnel Partners (STP) informed WSDOT today that they expect to receive a plan on potential repairs to the SR 99 tunneling machine from the machine’s manufacturer Hitachi Zosen by the end of this month. This will include a schedule for how long the repair work would take. Earlier this week, STP told us the plan may be completed by the end of the week, but said today more time is needed for the Hitachi to prepare it.

It appears likely that repairs will be made by digging a shaft from the surface so the machine can be entered from the front. Entering the back of the machine would require removal of more equipment and likely take longer. STP will begin work next week on the design of the shaft so if that option is selected, some of the necessary work will already be underway.

We will post additional information as we receive it from STP.

Previous updates

Feb. 12, 2014 update – Video of Tuesday's news conference

Feb. 10, 2014 update – Accessing the seal system inside the tunneling machine

Feb. 7, 2014 update – Two factors contributed to tunnel stoppage

Jan. 31, 2014 update – Further evaluation required before tunneling can resume

Jan. 28, 2014 update – SR 99 tunneling machine inches forward