SR 525, SR 99 to SR 526, Phase 2
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Snohomish County
WSDOT widened State Route 525, commonly called the Mukilteo Speedway, between 132nd Street Southwest and Paine Field Boulevard in the City of Mukilteo in Snohomish County. Crews also added new turn lanes, transit pullouts, sidewalks, and a center median; they also rebuilt traffic signals and installed equipment to allow us to provide real time traffic information. In addition, we installed underground storm water treatment facilities to improve water quality and prevent local stream flooding.
This project enhanced safety and improved traffic flow on this busy highway. Prior to construction, a high number of accidents occurred on SR 525, where drivers had to dart in front of fast-moving oncoming traffic in order to turn left from the center turn lane.
Construction Summary
WSDOT and the community made several changes to the project design after the construction contract was awarded, which added time and cost to the project. These changes included installing a new signal just north of Harbour Pointe Boulevard North and modifying a signal at SR 525 and Paine Field Boulevard. These changes will accommodate a future fourth leg at the Paine Field Boulevard intersection. Project partners provided the $528,000 needed to complete this work.
Other changes included constructing a temporary two-way left turn lane during construction to ease heavier-than-expected congestion, installing additional left turn lanes and changing the concrete median to allow landscaping. This required an additional $52,000 in construction and additional traffic control costs.
In addition, crews worked through winter to deliver traffic and safety improvements faster. This cost an additional $400,000 because we were required to replace wet soil with gravel to alleviate drainage problems resulting from winter construction.
Crews also built additional sidewalks which cost $60,700. These sidewalks were promised to the City of Mukilteo as part of the project. We originally planned to build the sidewalks later with the roadside restoration project, but that would require digging up and reconstructing newly installed drainage facilities. We opted to build the sidewalks now to save reconstruction money and minimize traffic disruption later.
This newly-widened roadway was open to traffic in October 2003 on schedule. We placed the last layer of asphalt and installed striping and other pavement markings in summer 2004. Crews are still building small sections of sidewalk and installing pavement markings, a pedestrian handrail, a noise wall panel and landscaping. Despite time and cost saving measures the project is a year behind schedule. This is due to late changes in the design and the sidewalk portion of the project.
WSDOT and our contractor, KLB Construction, worked together to complete the work and solve problems as they occurred.
Contractor
KLB Construction, Mukilteo, WA
WSDOT Contact
Marlin Lenssen, Project Engineer
Phone 425-339-1719
E-mail: lenssmj@wsdot.wa.gov
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