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Project Title & Location
I-5/Pierce County Line to Tukwila – Stage 4, on I-5 in Milton and Federal Way, in south King County.
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Project Description
This Project widens I-5 to provide northbound and southbound HOV lanes and ITS from the Pierce County Line to South 320th Street.
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Contractor/Consultant
Project is not yet advertised or awarded.
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Recent Progress
Drainage redesign is 60% complete. Converted project base map from metric to English units. Reviewing current design standards for specific requirements for this project.
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Design Construction Impacts
Current assessment indicates that no additional right-of-way will be needed. King County has expressed interest in modifying the planned stormwater pond in the NE Quadrant of I-5 and State Route 161 to function as a flood control facility.
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Environmental Impacts / Compliance
Preparing application for hydraulic permit, Corps of Engineers, and Department of Ecology water quality permits. Project will comply with current standards.
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Impacts to Traffic
Estimated traffic impacts during construction will add 15 minutes to northbound trips and 15 minutes to southbound trips. High traffic impact work will be done at night.
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