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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
Consultant - Huitt-Zollars
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Recent Progress
Drainage redesign is 70% complete. Reviewing current design standards for specific requirements for this project. Design documentation has been started. Scheduled soil borings to determine infiltration rates at proposed pond sites.
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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 storm water pond northeast 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 environmental 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 scheduled to be done at night.
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