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Project Title & Location
I-405/SE 8th to I-90 (South Bellevue)
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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
Updated mainline I-405 alignment through project area to best fit with future phases of the project. Studied Wilburton Tunnel replacement options. Evaluated conceptual design of storm drain system. A corridor-wide Endangered Species Act Biological Assessment is in progress as is a corridor-wide Access Point Decision Report.
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Design Construction Impacts
Expect moderate construction impacts. Plan to rebuild Wilburton tunnel within the center median area between Northbound and Southbound I-405 minimizing 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 is expected to begin January 2005 with an agency and public scoping meeting.
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Impacts to Traffic
Will be more fully determined as this project's design is further along.
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| Project
Milestones |
Scheduled |
Attained |
Milestone Outlook |
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Preliminary Engineering Start (Nickel funding)
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July 1, 2003
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July 1, 2003
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Nickel funding began on schedule.
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Finding of No Significant Impact
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July 2007
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On schedule, no issues at this time.
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Right of Way Certification
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April 2008
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On schedule, no issues at this time.
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Request For Proposal
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October 2007
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On schedule, no issues at this time.
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Open to Traffic
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June 2011
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On schedule, no issues at this time.
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