SR 880 Deck Replacement

This project consisted of removing and replacing a bridge deck (29.67’ wide by 458.29’ long) on Southbound SR 880 while preserving the existing cast-in-place girders, bent caps and hinges. The work occurred in Alameda Creek, an active water channel which required a water diversion system. To ensure no damage occurred to the existing superstructure two temporary support systems were required, longitudinally and transversely. Other aspects of the work included a slope stability analysis, bird deterrent, rapid strength concrete (RSC), joint seal replacements, carbon fiber reinforced girders and accelerated work to complete the project within the in-creek working window from June 15th, 2021, to October 15th, 2021. The temporary support systems reinforced the bridge structure and existing girders as crews cut and removed 3-ton panels off the bridge deck. This work was performed behind k-rail placed along SR 880 while still allowing vehicles to exit the southbound off-ramp to Alvarado-Niles Blvd. Pedestrian routes were also maintained underneath the bridge on the Alameda Creek Trail. Crews completed the in-creek work prior to the October 15th deadline and final work for the Joint Seal Replacements concluded March 25th, 2022.