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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
I-405 design and environmental process are on schedule. Design solutions are compatible with the I-405 Master Plan. 15% design drawings submitted for interdisciplinary quality control review. Draft environmental discipline reports completed and presented at public open house in November and agency open house in December. Coordinated design of Renton Nickel and Transportation Partnership Account (TPA) projects. Springbrook Early Environmental Investment (EEI) contract drawings progressed from 60% to 90% for wetland mitigation.
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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 alignment of I-405 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. Detailed design work is continuing for an "Early Environmental Investment" site near Springbrook Creek in Renton.
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Impacts to Traffic
Impacts to the traveling public are expected to be minimized during construction.
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| Project
Milestones |
Scheduled |
Attained |
Milestone Outlook |
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Preliminary Engineering Start
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July 2003
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July 2003
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On schedule, no issues at this time.
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Finding of No Significant Impact
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Jan. 2007
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On schedule, no issues at this time.
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Right of Way Certification
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Oct. 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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Dec. 2010
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On schedule, no issues at this time.
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