Portions of Highway 99 in central Seattle will close in late August for two days of repairs in Sodo and a four-day bridge removal near Seattle Center.
The work starts late Friday, Aug. 22 and wraps up at 5 a.m. Wednesday, Aug. 27. The state’s project homepage is here.
- An overpass where Aurora Avenue North crosses now-defunct Broad Street will be removed and replaced with a surface road deck, taking the entire four days. Workers are already depositing recycled concrete beneath the overpass — so that by late August, the bridge can be cut away and new pavement can be substituted. The decommissioning of lower Broad Street has long been envisioned as part of the city’s Mercer Corridor Project, and also will make room for new ramps at the future Highway 99 tunnel’s north portal. Eventually, surface streets will be connected east-west across Aurora, after the fast bypass traffic moves underground.
- On Friday night, southbound Alaskan Way Viaduct traffic will cease at 10 p.m., but northbound traffic from Royal Brougham Way South through the Battery Street Tunnel and beyond will stay open until midnight for football fans leaving the Seahawks game.
- A damaged expansion joint on the Viaduct, at the Seneca Street offramp, will be repaired, a two-day operation. The Viaduct reopens at 5 a.m. Monday, Aug. 25, but Highway 99 will remain closed two more days from the Battery Street Tunnel to Valley Street. This means northbound traffic must exit at Western Avenue all day Monday and Tuesday.
- Ivy will be removed from sections of the Viaduct.
- Workers will replace 81 concrete panels in Sodo, also a two-day operation.
The state chose to perform the Sodo work at the same time as the overpass replacement, to avoid spreading multiple projects over several weekends, said Matt Preedy, deputy administrator for the Highway 99 project.