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Project Title & Location
I-5 Roanoke Vicinity Noise Wall Project - Seattle
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Project Description
The project will build noise walls to reduce existing freeway-generated noise along I-5 in the Roanoke vicinity. The project is funded to complete design and construction.
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Contractor/Consultant
Mowat Construction is the contractor for Stage 1. Wilder Construction is the contractor for Stage 2.
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Recent Progress
Stg 1 Construction. Contractor's (Mowat) shop drawings have been reviewed and approved. Panel fabrication has begun. A Change Order was issued for minor wall realignment to avoid utility conflicts. Mowat recently encountered big rocks and tree stumps during clearing & grubbing. Additional funds from PE were moved into Stage 1 construction to cover these costs.
Stg 2 Design. Contract was advertised on January 31, 2005. Bids were opened on March 2, 2005 there were 2 bidders out of 8 plan holders. The lowest bid came in 14% over engineering estimate. HQ approved additional Nickel funds to award. Contract was awarded to Wilder Construction Company on March 18, 2005. For a full description of the project, please visit the project web page: http://www.wsdot.wa.gov/projects/I5roanokeNoiseWall/
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Design Construction Impacts
Seattle City Light (SCL) and SDOT relocated illumination system on Boylston Ave. E to the West side of the street. SCL will participate in cost. Also coordinating with NW Region on other I-5 projects in the vicinity. Plan to publish a joint brochure and multi-project website to keep the public informed of upcoming activities and roadway closures at all times. A special traffic control plan will accommodate school bus loading during the afternoons.
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Environmental Impacts / Compliance
Environmental documentation (SEPA/NEPA compliance) has been cleared. Noise Variance permit has been obtained. Street Use permits have been obtained from the City of Seattle for stage 1 and stage 2.
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Impacts to Traffic
There will be street and lane closures on local streets during construction. Metro service may be impacted temporarily (weekends only). A bus stop on Boylston Ave. E. will be closed permanently due to reduced shoulder width and low ridership. Details are being coordinated with the City of Seattle and King County Metro.
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