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Project Title & Location
SR18 - Issaquah/Hobart Rd to I-90 - EA - Maple Valley to Snoqualmie
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Project Description
This project will complete the environmental work for widening
SR 18 to 2 lanes each direction with truck climbing lanes between
Issaquah/Hobart Road and I-90, constructing a new interchange at Tigergate
summit and making improvements to the I-90/SR 18 interchange.
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Contractor/Consultant
Consultant - HDR Engineering
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Recent Progress
Public Open House #1 was held in March 2005. Preliminary environmental and geotechnical investigations of the project area have been completed. Coordination with stakeholders and resource agencies are continuing.
As the design of this project has progressed it has become apparent that the I-90/SR 18 interchange should be the first section constructed in the remaining corridor. A proposal to refine the scope of the project so that more emphasis is placed on the I-90/SR 18 interchange has been sent to the Legislature for approval. This scope modification will involve completing the preliminary design and right of way plan for the interchange improvements. The project will then be further advanced when funding becomes available. This proposal has been approved by the Transportation Commission and is awaiting final legislative approval.
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Design Construction Impacts
Construction phase not yet funded. Please see the project page for more information.
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Environmental Impacts / Compliance
The project is in early stages of the environmental documentation process. During this process, the design team will identify project impacts and address compliance issues.
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Impacts to Traffic
The completed SR 18 project will improve traffic flow and safety on the highway.
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