Update on opening the northbound off-ramp to downtown and Alaskan Way

Posted on Feb 15 2019 3:24 PM

The remarkable snow Seattle received last week and weekend slowed construction of the one remaining SR 99 tunnel ramp not yet open. At the tunnel’s south end, the northbound off-ramp to downtown and Alaskan Way remains under construction.

This ramp is a critical link to downtown for drivers and transit coming from the south and west. Without it, there are no exits on northbound SR 99 between Spokane Street and the north end of the tunnel. This ramp was always going to open later than the rest of the tunnel, but the snow delayed some construction activities.

With a break in the weather, crews are working to get back on track. Barring more bad weather, they hope to complete forming and pouring the barriers on the ramp in the next few days. Sand that was placed on the ramp during the storms will be cleaned up over the weekend in preparation for lane marking. Signing, lane striping, wiring and lighting also must be done before the ramp can open. The photos below show barrier work in progress.

A section of rebar formed in the shape of a highway barrier

Above: The rebar and conduit are in place for this section of ramp barrier, but the concrete has not yet been poured.


Crew working on newly poured concrete for a highway barrier

Above: Crew work on a section of barrier for the new off-ramp to downtown and Alaskan Way.


Wide angle shot of south portal of tunnel with seattle skyline in background

Above: The blankets at right are covering concrete sitting to cure.

If the weather cooperates and work goes well, the ramp could open next week – perhaps in time for the Sounders match on Feb. 20 at CenturyLink Field. We’ll continue to provide updates as work progresses. You can watch crews work on the ramp on our construction cameras.

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