Tualatin River Bridges – Stafford | Tualatin River , Oregon

$10.3 million – Competitive Bid

Clackamas County | Wildish Standard Paving Co.

The Tualatin River Bridges project replaced two bridges that were considered functionally obsolete and structurally deficient.
The Stafford project site involved replacing an existing 13-span steel and timber supported structure with a new 3-span all concrete structure, improving the roadway alignment and adding bike lanes. The new bridge is a 445-foot long by 55-foot wide structure. The substructure concrete is supported on 24-inch diameter by 100-foot long pipe pile foundation at the end bents and on 6-foot diameter and over 100-foot deep drilled shafts at the interior bents. The superstructure consists of 90-inch tall bulb-T girders spanning up to a 165 feet, and a cast-in-place concrete bridge deck. After the new bridge was open to traffic the existing concrete and steel truss bridge was removed, all working within limited in water work windows.