Tualatin River Bridges – Borland | 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.
At Borland Road, a narrow weight-restricted bridge was replaced with a new 3-span, 300-foot long by 53-foot wide structure that also satisfied architectural and historic interests of the local community. Construction included temporary detour and work bridges, emolition of the existing bridge, construction of the new bridge and removal of the temporary bridges. The foundation, as originally designed, called for large cofferdams and many steel piles placed in the river. Through a collaborative effort, this was redesigned to drilled shafts, greatly reducing the impact to the river and at a cost savings to the Owner. The columns and bridge rail were designed with architectural details, selected by local interests, as they would be visible from the adjacent park and pedestrian pathway.
At Borland Road, a narrow weight-restricted bridge was replaced with a new 3-span, 300-foot long by 53-foot wide structure that also satisfied architectural and historic interests of the local community. Construction included temporary detour and work bridges, emolition of the existing bridge, construction of the new bridge and removal of the temporary bridges. The foundation, as originally designed, called for large cofferdams and many steel piles placed in the river. Through a collaborative effort, this was redesigned to drilled shafts, greatly reducing the impact to the river and at a cost savings to the Owner. The columns and bridge rail were designed with architectural details, selected by local interests, as they would be visible from the adjacent park and pedestrian pathway.