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Project Title & Location
I-5/SR 161 I/C & SR 18 I/C (Triangle)
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Project Description
The I-5/SR 161/SR 18 Interchange Improvement project (Triangle Project Phase 1) includes replacing a cloverleaf loop ramp with a flyover ramp for WB SR 18 to SB I-5 traffic and provide a new WB SR 18 connection to SR 161. The I-5/SR 18 cloverleaf interchange is defined as a High Accident Location. Eliminating one of the loop ramps will eliminate the weave on WB SR 18 and SB I-5. These improvements will improve traffic flow and safety.
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Contractor/Consultant
Consultant Berger/ABAM
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Recent Progress
The Interchange Justification Report is being revised and will be resubmitted to FHWA.
The Channelization Plans are being revised and will be submitted for final approval.
Beginning Plans, Specifications and Estimate phase; preliminary bridge plan design ongoing.
Met in field with Geotech group, drilling will begin in March.
Acquired wetland and stream mitigation property.
Submitted the Phase 1 Right of Way Plan to HQ for approval.
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Design Construction Impacts
There is not enough funding for full build out, so the project will be constructed in phases.
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Environmental Impacts / Compliance
Environmental impacts identified by preliminary discipline reports are minimal. Begin permittng process Spring 2008. There is one fish barrier in phase 1.
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Impacts to Traffic
A staging plan will be developed to minimize traffic impacts during construction. There will be impacts to I-5 to set the steel girders of the flyover structure.
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