Credit River Bridge
Brown & Co. Engineering Ltd. prepared a report on the cause of the distress of the abutment bearings for this long, twin, multi-span precast girder bridge. It must be noted that the bearing distress is a serviceability problem and does not result in a safety concern at the bridge in the near term (2008). The bridge, which has been widened twice, was determined to be suffering from shrinkage induced horizontal curvature. The anticipated curvature has been estimated using a time dependant staged construction approach incorporating the current shrinkage and creep modeling in the CHBDC and found to be reasonable consistent with the observed curvature. Several tentative solutions to address the long term serviceability of the bridge have been developed and are under consideration by Highway 407.