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Project Title & Location
I-5 / SR 502 Interchange
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Project Description
This new interchange, connecting I-5 to State Route 502, will reduce congestion, improve safety and provide more direct access from Interstate 5 to north Clark County and Battle Ground.
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Contractor/Consultant
Project is not yet advertised or awarded.
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Recent Progress
Staff review of 90% plans has been completed and this project is currently finalizing the PS&E. WSDOT has submitted applications for federal, state, and local environmental permits and is purchasing Right of Way. The current Project Cost Summary reflects WSDOT's construction budget increase of $ 10 million due to cost escalation.
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Design Construction Impacts
The geotechnical report identified high moisture content in the native soils which makes it unsuitable as subgrade without improvement. The contract will include two alternatives for subgrade stabilization: overexcavation and replacement with borrow material and cement modification.
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Environmental Impacts / Compliance
This project will receive an individual permit from the US Army Corps of Engineers. Approximately 20 acres of new wetland will be created to mitigate the impacts of the project. HPA and Sect 401 Cert have been received.
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Impacts to Traffic
No impacts during design. The construction of the bridge will require 8 nighttime closures of I-5 in order to places supergirders. The construction of the fish passable culvert will require a 5 day closure of the Gee Creek Rest Area.
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