SEATTLE – Drivers headed to or from Seattle and the Eastside will need to plan ahead next weekend, Oct. 7 - 9. A double whammy of closures will affect the east/west travel of motorists heading across Lake Washington and the north/south travel of drivers through Seattle.
State Route 520 will close so crews can complete paving work on Montlake Boulevard, restripe the new floating bridge, install permanent tolling equipment, and perform routine maintenance on tolling structures. The closure will begin at 11 p.m. Friday, Oct. 7, and will end at 5 a.m. Monday, Oct. 10, in time for the weekday commute.
Crews from several projects will coordinate their work over the weekend. Crews working on the West Approach Bridge North project will close single lanes along Montlake Boulevard to complete grinding and paving work. On the Eastside, crews will complete lid maintenance at Evergreen Point, 84th Avenue Northeast and 92nd Avenue Northeast. Floating Bridge and Landings crews will restripe both east- and westbound SR 520 and complete barrier and noise walls south of the highway, while crews working for the Toll Division will install new tolling equipment and perform routine maintenance of the tolling system.
Alaskan Way Viaduct
From 6 a.m. to 6 p.m. Saturday, Oct. 8, and Sunday, Oct. 9, both directions of State Route 99 will be closed between South Spokane Street and the north end of the Battery Street Tunnel for a semiannual inspection (pdf 3 mb). WSDOT closes the viaduct for inspection every fall and spring so WSDOT engineers can thoroughly examine the aging roadway and make sure it remains safe for drivers.
Also, between 6 a.m. and 3 p.m. Saturday, Oct. 8 only, crews working north of the Battery Street Tunnel will close SR 99 in both directions from the tunnel to Valley Street. Northbound drivers can access SR 99 at Valley Street.
The Alaskan Way Viaduct is being replaced with a tunnel which is currently scheduled to open to traffic in January 2019.
SR 520 Closure details:
Viaduct semiannual closure details:
What to expect Monday morning
Crews will restripe about 2000 feet (pdf 532kb) of the floating bridge westbound lanes to allow for a longer and smoother merge where the three westbound lanes transition to two lanes on the old west approach bridge.