I-90/SR 18 weekend closure update: revised plan due to rain

Spring weather is keeping construction crews on their toes yet again.

Rather than canceling this weekend’s planned I-90/SR 18 work because of the rainy forecast, crews are shifting work to a different ramp with a shifted closure time.

THE NEW PLAN

From noon Saturday, May 16 until 5 a.m. Tuesday, May 19:

• The eastbound I-90 on-ramp from both directions of SR 18/Snoqualmie Parkway will close
• The right lane of eastbound SR 18 south of SE 104th St will be closed
• The right-turn lane from eastbound SR 18 to eastbound I-90 will be closed

During this closure, crews will grind pavement, do electrical work, pave all lanes of the ramp, and install guardrail and curbing and adjust stormwater drainage.

Crews plan to begin paving late Saturday or early Sunday after the rain clears, then continue through Sunday and Monday. If work finishes early, the ramp will reopen early.

DETOUR DETAILS

Because exit 22 (Preston/Fall City) tends to back up heavily during these closures, drivers should follow the signed detour:

WB I-90 → Exit 20 (High Point Way) → loop back to EB I-90

Residents on SE 104th St will still have access from all directions, but should expect construction vehicles moving through the area and possible delays near the ramp intersection.

LOOKING AHEAD

A few more major closures are still coming as the I-90/SR 18 diverging diamond project wraps up:

• The westbound I-90 ramp closure originally planned for this weekend is now scheduled for May 29–June 1
• One final extended “full closure” of SR 18 (only under I-90) is planned for June 4–8 for final paving work

Planned closures may be postponed and rescheduled with short notice if rain is in the forecast.

During the upcoming soccer tournament, no major closures will be allowed mid-June through mid-July.

We know these last few months of closures have been a bit of a grind. Crews are working to get the paving done while squeezing around those spring weather windows. This work is weather-dependent and may be rescheduled. Schedule updates will be available on the project webpage, WSDOT’s Travel Center map and the WSDOT mobile app.