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Project Evaluation: SR 9, US 2 Interchange Modifications

Snohomish County
We realigned the westbound US 2 off-ramp at SR 9 with New Bunk Foss Road, an adjacent county road located about two miles north of the city of Snohomish.  Drivers on both roads were competing to merge onto SR 9, resulting in frequent accidents and congestion at this busy interchange.  Now, traffic on the westbound US 2 off-ramp must merge into New Bunk Foss Road before reaching SR 9, which greatly improves safety and traffic flow. In addition, we relocated the westbound US 2 on-ramp to line-up with the new configuration, installed and interconnected signals at this interchange and enhanced the environment by constructing a new wetland site near the Pilchuck River. In doing so, we discovered a culturally historic site and designed the wetland around it.

Design:  Construction Management:  Schedule:  Cost:  Engineer's Estimate: $ 3,455,645 Contractor's Bid Amount: $ 2,482,000 Anticipated Final Payment to Contractor: $ 2,490,000

Construction Summary
We anticipate completing this project on time and within budget.  Remaining work includes roadside planting and three years of plant establishment.

Crews completed most of the construction  during the summer of 2004.  They completed all of the interchange improvements in 2004 except for the final ramp connections, signal work, roadside planting, and wetland mitigation planting.  In order to provide the most value to the customer, WSDOT and Wilder Construction worked aggressively to open under a temporary configuration.  However, we didn’t receive the signal equipment and illumination poles in time and determined that it was not possible to open the interchange without the signal and lighting systems in place. We decided to shut down the project for the winter and complete the paving and signal work when warmer, drier weather returned. 

In spring of 2005 we completed the remaining paving and signal work during a full week closure of New Bunk Foss Road and a weekend closure of the off- and on-ramps to and from US 2.  The weekend closure allowed the completion of ramps and road connections in the most efficient and least disruptive manner.  During the closures, we provided effective and relatively convenient detours for the motoring public.

Contact Information
Contractor:
Wilder Construction, Everett

WSDOT Contact:
Dave Lindberg, Project Engineer
(206) 814-7104
lindbed@wsdot.wa.gov

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