At yesterday’s city council meeting, Mike O’Brien gives a heads up on the sinking viaduct. “We’re clearly in a phase where this is unanticipated what is going on ……” on a report that the viaduct had settle 4/10 inch as a result of contractor work on the tunnel.
We contacted WSDOT immediately after seeing a tweet related to that yesterday. The report was inaccurate, says WSDOT, which published a clarification today.
They anticipated some settling when the TBM bore under the viaduct, but I don’t think they expected prior to that. But they pumped out all the ground water to do inspections last month. My guess is that has contributed to the recent settlement.