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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 was submitted to FHWA.
The Channelization Plans were submitted for final approval.
Beginning Plans, Specifications and Estimate phase; preliminary bridge plan design ongoing.
Met in field with Geotech group, drilling to commence by end of year (2007)
Met in field with Department of Fish & Wildlife to evaluate culvert fish barriers.
Began appraising wetland mitigation property.
Submitted the Phase 1 Right of Way Plan to HQ for approval.
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Design Construction Impacts
Phase 1 of this project is not affected by the failure of the Regional Transportation Improvement Package (RTID). Phase 2 relied on the funds provided by RTID and hence will need other funding to complete the design and construction.
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Environmental Impacts / Compliance
Environmental impacts identified by preliminary discipline reports are minimal. We have decided to switch the NEPA classification from an Environmental Assessment (EA) to a Documented Categorical Exclusions (DCE).
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Impacts to Traffic
The consultant will develop a staging plan to minimize traffic impacts during construction.
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