CANCELED: Due to an unfavorable weather forecast, the full closure of SR 18 for the final paving of the I-90/SR 18 diverging diamond interchange June 4-8 has been postponed. This work will be rescheduled for a later date.
The Interstate 90/State Route 18 interchange project is nearly complete, but one final extended weekend paving closure is needed starting Thursday, June 4
From 9 p.m. Thursday, June 4, to 5 a.m. Monday, June 8, traffic will not be allowed along either direction of SR 18 beneath the I-90 bridges near Snoqualmie. All right-turning ramps will remain open at the I-90/SR 18 interchange during this full closure.
People traveling through the I-90/SR 18 interchange should plan ahead, allow extra travel time, especially during peak travel times, and follow signed detours.
What to expect June 4-8
Eastbound and westbound I-90 traffic will not be affected during most of the closure, but people traveling through the area should be aware that:
- Vehicles will not be permitted on either direction of SR 18 beneath the I-90 bridges.
- Traffic on the eastbound and westbound I-90 off-ramps will only be able to turn right.
- Eastbound SR 18 traffic must use the eastbound I-90 on-ramp and follow a detour.
- Southbound traffic on Snoqualmie Parkway must use the westbound I-90 on-ramp and follow a detour.
During this closure, construction crews working for the Washington State Department of Transportation will complete final paving for the Diverging Diamond Interchange under I-90. This closure requires dry weather and may be rescheduled with short notice if rain is forecast.
Detour routes
People can detour around the closure using eastbound and westbound I-90 and loop around at nearby interchanges – High Point Way (exit 20) to the west and Southeast North Bend Way/Winery Road (exit 27) to the east.
Future widening planned
Another project to continue widening SR 18 from Deep Creek (milepost 26) to Tiger Summit (milepost 24), as well as making improvements at the Issaquah-Hobart Road interchange with SR 18, is currently in design. It is scheduled to begin construction as early as 2030.
Real-time travel information is available via the WSDOT mobile app, the WSDOT Travel Center Map or by signing up for WSDOT’s email updates.
[Information provided by the Washington State Department of Transportation (WSDOT)]
