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Project Title & Location
I-5 - Mellen Street to Grand Mound
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Project Description
This project will widen sections of I-5 between Mellen Street in Lewis County and the Grand Mound interchange in Thurston County to increase traffic flow and safety. The project will be constructed in two stages - Stage 1: Blakeslee Junction to Grand Mound, Stage 2: Mellen Street to Blakeslee Junction.
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Contractor/Consultant
David Evans and Associates, Inc. is performing 90% design for Stage 1 and a portion of the environmental reports for Stage 2.
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Recent Progress
Stage 1: Environmental Discipline Reports and DCE are complete for Blakeslee to Grand Mound. The project team is working on 90% design review. Right of way acquisition is taking place. Environmental permit applications have been submitted and permits are pending.
Stage 2: The design team is moving forward with making the change to a collector distributor (CD) system design between the Harrison Ave and Mellen St. Interchanges. Additionally, the CD design option was presented during an October 2nd, 2008 Open House.
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Design Construction Impacts
Stage 1: Construction is currently scheduled for 2010. Anticipated construction impacts will be assessed as the design phase is advanced. Close coordination of construction staging is on going with Olympic Region's Grand Mound to Maytown project.
Stage 2: Construction is currently scheduled for 2012. Anticipated construction impacts will be assessed as the design phase is advanced. Constructability is a major element in the design of this complex portion of I-5.
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Environmental Impacts / Compliance
Stage 1: Stormwater treatment for flow control will require off-site mitigation and right-of-way acquisition.
Stage 2: Potential environment impacts are being evaluated as part of the environmental documentation process.
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Impacts to Traffic
Stage 1 & 2: The design team will generate effective staging plans to minimize construction impacts to the traveling public.
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