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Journal staff
It was "battle of the bridges" in the public works category this year. The list of structures included: High Bridge No. 41; Wenatchee River Bridge; Black Lake interchange; 134th Street undercrossing; Argonne Road underpass; Blandford Bridge; and Rock Creek Bridge.
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High Bridge No. 41
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Spanning the competition was High Bridge No. 41, followed by the Argonne Road project in the Spokane Valley and the Wenatchee River Bridge in Leavenworth.
The High Bridge project involved replacing an existing deteriorated steel-truss bridge and wood trestle approach with a post-tensioned, single-cell, box girder, cast-in-place bridge. To avoid placing a pier in the river channel, the bridge was designed with a center span of 235 feet. Because of the long span, a 7,500-psi, 28-day concrete was used.
The Argonne Road underpass was created to solve a congestion problem caused by 70 daily railroad trains crossing a road that carries 25,000 vehicles. The solution was a grade separation. The train tracks were raised four feet and Argonne Road was lowered 22 feet to provide proper clearance. Doing that required construction of a bridge to carry train traffic over Argonne Road.
A post-tensioned, cast-in-place concrete box girder bridge was selected to span Argonne Road. It includes concrete projections on the bottom edge of the outside girders to protect them from over-height trucks.
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Argonne Road underpass
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The Wenatchee River Bridge was designed to be compatible with the Bavarian theme of the city of Leavenworth. That was done by adding creative touches to a standard prestressed concrete girder bridge with a cast-in-place substructure. Ready-mixed concrete was used to create recessed and raised panels, decorative light standard support pedestals on the bridge railing, and pedestals at the cross beams to hold flower planters. The bridge was topped off with special turn-of-the-century replica light standards.
Project teams
- High Bridge No. 41: Snohomish County, owner; Sargent Engineers Inc., engineer; Wilder Construction Co., general contractor; and Cadman Inc., concrete supplier.
- Argonne Road underpass: Spokane County, owner; CH2M Hill, engineer; Harcon, general contractor; and Acme Construction & Materials, concrete supplier.
- Wenatchee River Bridge: Washington State Department of Transportation, owner; WSDOT Bridges & Structures, engineer; Ross Brothers, general contractor; WSDOT, architect; and Wenatchee Sand & Gravel, concrete supplier.
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Wenatchee River Bridge
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- Black Lake interchange: Washington State Department of Transportation, owner; WSDOT Engineering, engineer; Kiewit Pacific Co., general contractor; and Holroyd Co. Inc., concrete supplier.
- 134th Street undercrossing: Washington State Department of Transportation, owner; WSDOT Engineering, engineer; Kiewit Pacific Co., general contractor; and Aphis Ready Mix, concrete supplier.
- Blandford Bridge: Washington State Department of Transportation, owner; Tams Consultants, engineer; Kiewit Pacific, general contractor; and Aphis Ready Mix, concrete supplier.
- Rock Creek Bridge: Washington State Department of Transportation, owner; WSDOT Engineering, engineer; F.E. Ward Constructors, general contractor; and Aphis Ready Mix, concrete supplier.
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