Contract summary
The project will construct a four-lane Diverging Diamond Interchange (DDI) at the I-90 and SR 18 interchange in combination with the widening of SR 18 to four lanes to improve traffic operations and safety and reduce congestion at the I-90 and SR 18 interchange and along the SR 18 mainline.
Publication Date
Contract status
Awarded
Contract ID
009572
County
King County
Submittal due date and time
Estimated value
$85,000,000-$110,000,000
Funding source
A state project with a 26% voluntary minority/small/veteran/women business enterprise goal
Contact