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Project Title & Location
I-405/ 112th Ave to SE 8th (Nickel and TPA)
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Project Description
This project combines the Bellevue Nickel project which builds one additional southbound lane from vicinity of NE 8th to I-90 and one additional northbound lane from I-90 to SE 8th with the TPA project to create a new northbound auxiliary lane from 112th Ave SE to I-90.
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Contractor/Consultant
HNTB Corporation is the lead consultant of the General Engineering Consultant Team.
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Recent Progress
This project combines both Nickel and the Transportation Partnership Account (TPA) funded projects to create a single bundled project. This bundled project provides congestion relief by constructing one new lane from 112th Ave. SE to the I-90 Interchange, including ramp metering and lane re-striping; adding one additional southbound lane from vicinity of NE 8th St. to I-90, which includes replacing the Wilburton tunnel; and adding one additional northbound lane between I-90 and SE 8th St. The project-specific environmental process includes an EA for the Bellevue Nickel work from SE 8th to I-90 and one for TPA portion from 112th Ave. SE to I-90, which is included in the Renton to Bellevue EA. Both are on schedule.
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Design Construction Impacts
Construction impacts would occur between 112th Ave. SE to SE 8th St. Structure widening will occur at Coal Creek, SE 8th St., and over the BNSF railroad. From SE 8th to I-90, the Wilburton tunnel will be rebuilt within the center median area between Northbound and Southbound I-405, which minimizes those potential construction impacts.
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Environmental Impacts / Compliance
A corridor wide Record of Decision for the programmatic FEIS was received in October 2002. Project-level environmental documentation includes two Environmental Assessments (EA’s) for the area. The Bellevue Nickel EA has completed it’s public comment period in March 2006, and the Renton to Bellevue EA comment period was extended to May 12 at the request of the community.
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Impacts to Traffic
Moderate construction impacts are expected, with the project minimizing them as much as possible. Impacts will be more fully determined when this project's design is further along.
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Milestones |
Scheduled |
Attained |
Milestone Outlook |
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Preliminary Engineering Start (Nickel funding) (TPA funding)
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July 2003 Jan. 2006
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July 2003 Jan. 2006
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Nickel portion of project engineering began in advance of TPA projects. TPA funded engineering work was put on hold while awaiting public vote on gas tax. Preliminary Engineering work began Jan. 2006.
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Finding of No Significant Impact
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Dec. 2006
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On schedule. No issues at this time.
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Right of Way Certification
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April 2007
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On schedule. No issues at this time.
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Request For Proposal
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Dec. 2006
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On schedule. No issues at this time.
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Open to Traffic
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Dec. 2009
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On schedule. No issues at this time.
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