I-5 - SR 161/SR 18 Triangle Improvements

Quarterly Project Report Update for Quarter Ending December 2004

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

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

A value analysis team looked at the project and proposed a hybrid alternative (VA1) that was based on several alternatives that had been developed on the project.

Based on traffic modeling and environmental impacts three alternatives are moving forward into a more detailed screening analysis, VA1, W3, and W4.

Developed alternative W3 cost estimate for RTID.

Design Construction Impacts
ยท Identifying project limits and project staging.

Environmental Impacts / Compliance

Environmental impacts and mitigation to be determined as part of the EA process.

Impacts to Traffic
No impacts at this time.  Project is not funded for design nor construction.

Project Milestones Scheduled Attained Milestone Outlook
Preferred Alternative Selected Feb05    Will begin detailed environmental analysis once completed.
Design Hearing Feb 06    
Receive FONSI May 06    
Project Cost Summary: Dollars in
millions 		Percent
of Total

Planned vs. Actual Expenditures
(Total Project Cost)
Project Expenditure Chart

Preliminary Engineering $3.7 m 100%
Right-of-Way $0.0 m 0.0%
Construction $0.0 m 0.0%
Funded Project Costs $3.7 m 100.0%

Nickel funds included in above costs

 $3.0 m 81%

2005 Transportation Partnership Account

  For more information, go to www.wsdot.wa.gov/projects

Bruce Nebbitt, WSDOT Project Engineer @ (206) 464-1363 or E-mail: NebbiEB@wsdot.wa.gov