Another change just announced – new since the briefing we covered Monday night – for the viaduct-to-tunnel transition: Now TWO ramps in the stadium zone will close on January 4th, a week before the mainline closure.
WSDOT had already announced plans to close the SB 99 offramp to Atlantic Street starting January 4th; today, the state says the NB 99 onramp from Royal Brougham will also be closed starting January 4th: “This additional week will allow the contractor more time to perform critical work (including unburying tunnel on- and off-ramps) that has the potential for some unanticipated challenges, giving crews additional flexibility during the mainline closure.” WSDOT’s short time-lapse video above shows the construction of the tunnel ramps that will be “unburied” at that time.
Today’s full update is here, including a note that the NB 99 transit lane in SODO will be shortened by a third of a mile starting December 14th, for repair work.
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