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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
Nickel Footprint development is underway in preparation for the environmental scoping meeting on 27January 2005. Preliminary site investigations by drainage and environmental experts will commence on 14 December 2004. Preparation of base mapping for existing utilities is underway. A joint meeting with the various Utility Agencies is scheduled for 19 January 2005. Alternative alignments for Benson Road crossing over I-405 are being developed to minimize total construction costs and accommodate proposed Nickel and Master Plan improvements. Aesthetics, architectural, landscaping, etc. design coordination meetings have continued with the cities of Tukwila and Renton. The I-405 Team is continuing to coordinate development of the Springbrook Early Environmental Investiments site with the State’s Oversight Committee.
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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 will begin January 2005. Conceptual design work is underway for an Early Environmental Investiment site.
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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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