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Project Title & Location
I-405/West Valley Highway to Maple Valley Highway in Renton
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Project Description
Project includes Nickel and TPA projects components to construct additional northbound and southbound lanes from I-5 to SR 169 and a separate southbound SR 167 lane between I-405 to SE 180th St.
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Contractor/Consultant
HNTB Corporation is the lead consultant of the General Engineering Consultant Team.
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Recent Progress
Completed QA/QC and Technical Review of 5% Nickel design. Continued preparation of cut sheets / plans for Design - Build RFP documents. Started strength testing of the existing shoulders of I-405 and SR167 to determine suitability for carrying traffic loads. Carried out annual CEVP analysis to determine estimated construction costs. Met with Utility owners and agencies in January 2005. Review of as-built utility drawings and identification of potential conflicts is ongoing. Environmental documentation process started in January 2005. Held Public and Agency Scoping meetings in late January 2005 and prepared draft responses to comments. Continued field surveying delineated wetlands and existing utilities. Continued coordination with Environmental Banking Oversight Committee (BOC) and the City of Renton to establish credits for Springbrook wetland mitigation site. Finalized Interdisciplinary Design Team (IDT) Site Visits and prepared Report summarizing results. Continued coordination with the Cities of Tukwila and Renton, local neighborhoods and businesses to resolve issues and concerns early in the Nickel project development.
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Design Construction Impacts
The West Valley Highway to Maple Valley Highway (Nickel) project is essentially a widening project for northbound and southbound I-405 legs approaching the SR 167 Interchange. Retaining walls will be utilized wherever necessary to minimize impacts to adjacent properties, wetlands and drainage facilities. The Benson Structure Overcrossing, including the center pier located in the I-405 median, will be replaced to accommodate the proposed widening of I-405 and the final alignment of I-405 anticipated for the Master Plan. The project also extends the southbound SR 167 HOV lane north to begin under the I-405 Structure. Widening and restriping of southbound SR 167 will also be required.
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Environmental Impacts / Compliance
A corridor wide Record of Decision for the programmatic FEIS was received in October 2002. The project Environmental documentation began in January 2005. Conceptual design work is continuing for an "Early Environmental Investiment" site near Springbrook Creek in Renton.
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Impacts to Traffic
It is expected that impacts to the traveling public can be minimized during construction.
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Milestones |
Scheduled |
Attained |
Milestone Outlook |
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Preliminary Engineering Start (Nickel funding)
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July 2003
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July 2003
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Nickel funded engineering work began on schedule.
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Finding of No Significant Impact
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January2007
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On schedule, no issues at this time.
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Right of Way Certification
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October 2007
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On schedule, no issues at this time.
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Request For Proposal
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April 2007
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On schedule, no issues at this time.
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Open to Traffic
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December 2010
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On schedule, no issues at this time.
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