Expect closures during state Route 18 interchange project

May 29, 2012

By Staff

Motorists can expect a facelift for a stretch of westbound Interstate 90 near Issaquah.

The state Department of Transportation plans to remove the bridge deck on the westbound interstate over state Route 18 soon.

The agency reduced the speed limit between mileposts 28 and 25 from 70 mph to 60 mph from May 29 to June 10 to accommodate the roadwork. Motorists can also expect daytime and overnight lane closures during the project.

The $736,000 project is meant to improve conditions for the 40,000 or so vehicles — including 8,600 tractor-trailers — traversing the section of interstate each day.

Crews plan to replace the old concrete with asphalt, as well as rebuild parts of bridge expansion joints. Plans also call for guardrails to be upgraded and for 250 feet of new guardrail to be installed.

Crews last paved the roadway in 1991 and the surface is deteriorating due to age and heavy use. Maintenance crews must frequently patch ruts and potholes on the aging bridge deck.

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