Project Title & Location
I-5/SR 161 I/C & SR 18 I/C (Triangle)

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.

Contractor/Consultant
Consultant Berger/Abam

Recent Progress

Berger/ABAM submitted channelization plans and deviations for review.

Purchasing the right of way on key properties adajacent to S. 356th St. - Phase 2 properties.

Requested access hearing waivers (two outstanding waivers).

Design office submitted PCRF to reallocate dollars and update scope.

Beginning Plans, Specifications and Estimate phase.

Met in field with Department of Fish & Wildlife to evaluate culvert fish barriers.

Contacted propery owners for right of entry at possible wetland mitigation sites.

First Draft of Phase 1 Right-of-Way plans have been submitted to Northwest Region for review.

Updated project Web page.

Design Construction Impacts
Need to secure key right of way for new offramp to S. 356th Street (Phase 2 properties).  We anticipate acquiring several more properties by the end of 2007.

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).

Impacts to Traffic
The consultant will develop a staging plan to minimize traffic impacts during construction.

Planned vs. Actual Expenditures
(Total Project Cost)

Nickel funds included in above costs

2005 Transportation Partnership Account