Nalley Valley Interchange (I-5) - SW Line Bridge
Tacoma, Washington
Project Description
Aiming to reduce congestion on I-5 through Tacoma, Washington, the Westbound Nalley Valley Iinterchange is the first of three phases of bridge construction in the historic Nalley Valley. The project will distribute traffic between I-5 and the Tacoma Narrows Bridge toward the Olympic Peninsula. An array of new structures will replace seismically obsolete bridges and provide a much needed increase in traffic capacity.
Aspire Bridge Magazine Article
American Segmental Bridge Institute (ASBI) Project Gallery
Awards
2011 American Segmental Bridge Institute (ASBI) Bridge Award of Excellence
Location
I-5 Nalley Valley, Tacoma, WA
Owner
Washington State Department of Transportation (WSDOT)
Contractor
Atkinson Construction
Designer
CH2M Hill & WSDOT
Total Contract Value
$120 million
Timeline
2009 - 2011
Construction Method
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Precast segmental concrete box girder bridge using balanced cantilever method with ground based cranes
- Pier table shells were precast using match-cast methods, erected, and filled with a cast-in-place diaphragm
- Span lengths up to 295 ft
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Our Role
Hatcher Technical worked with construction engineer McNary Bergeron to detail design drawings for the McNary Bergeron redesigned TEB and SW bridges. We then detailed the construction shop drawings for the SW Line Bridge.
Areas of the project that Hatcher Technical worked on included:
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Precast segmental bridge superstructure
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Cast-in-place pier table diaphragms
