#1. SR-500 Thurston Way overpass

Project cost: $26.7 million

About 85,000 vehicles pass through the state Route 500/Thurston Way interchange on an average weekday. A new overpass will help alleviate traffic.
Photo courtesy of Max J. Kuney Co.

Project address:
State Route 500 and Thurston Way, Vancouver

Start of construction:
April 2001

Expected completion date:
Oct. 1, 2002

Washington State Department of Transportation

The state’s first transportation design-build project -- a $23 million overpass that directs state Route 500 traffic over Thurston Way in Vancouver. The project is similar to the nearby Route 500 overpass that spans over Andresen.

The bridge involves a precast girder design, which has the least impact on the public, allowing more lanes of traffic to remain open during construction. The design will employ 12 prestressed concrete girders. Each 208-foot-long girder will comprise three components spliced together.

The goal of the project is to improve safety, create better connections to existing roads, improve pedestrian and bicycle connections, increase capacity of the intersection and decrease congestion.

Using the design-build process is expected to: save time because the design and construction phases overlap; allow innovation because the designer and contractor work closely together; and transfer risk from WSDOT to the design-build team because the team is responsible for errors that affect construction costs.


Design-build contractor:
Max J. Kuney Co., P.O. Box 4008, Spokane, WA 99220-0008, (509) 535-0651

Entranco, 10900 N.E. Eighth St., Suite 300, Bellevue, WA 98004-4405, (425) 454-5600
Kristen Betty & Associates Inc., 700 108th Ave. N.E., Suite 201, Bellevue, WA 98004, (425) 455-9720

Other Participants
Concrete Technology Corp.
Davis Landscape Nursery Inc.
Elcon Corp.
KLB Construction
Lakeside Industries
Pacific Rock Products
Parametrix Inc.
Petersen Brothers Inc.
White Shield

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