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Project Title & Location
SR 522/UW Bothell/Cascadia CC Campus Access – Bothell
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Project Description
This project will construct a new south access to the UW Bothell/Cascadia Community College Campus from I-405 and SR 522. The south access is planned to accommodate 80% of all campus traffic. By local ordinance, the campus cannot grow beyond 3,000 students without the south access. The state expects the co-located campus to grow to hold 10,000 students after the south access is constructed.
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Contractor/Consultant
A contractor will be selected in Spring 2006.
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Recent Progress
The Access Point Decision Report has been completed and submitted to Federal Highways for approval. The draft channelization plans and draft Hydraulics report have been completed. Chartering meetings have been held with Construction, Traffic, Bridge, Electrical, Landscape and Environmental offices to begin the process for developing the construction plans, specifications and cost estimates for the roadway, bridges and walls. Several meetings with the colleges and the City of Bothell have been held to develop the roadway entry design into the campus.
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Design Construction Impacts
The design requires the construction of a new bridge, widening of an existing bridge and construction of two 40-foot tall retaining walls adjacent to the new campus entrance road.
Construction will be in the vicinity of the Sammamish river. An existing maintenance area in the median of SR 522 will need to be relocated to an area under I-405. The colleges are funding Preliminary Engineering and Right of Way acquisition.
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Environmental Impacts / Compliance
The project wetland impacts are approximately 0.42 acres. Wetland mitigation is planned to be from the existing North Creek Floodplain/wetland mitigation site previously constructed by the college.
Water quality facilities are planned to be located within the existing right of way. Detention is not required for the Sammamish River.
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Impacts to Traffic
Construction of the project will require closures of the I-405 ramps and single lanes on SR 522 during the off peak hours to provide a safe work zone to widen the North Creek Bridge and construct the new alignment for SR 522. Detailed construction staging plans are now being developed.
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