The Bollinger Road Bridge Reconstruction Project on Calabazas Creek was initiated by the Santa Clara Valley Water District and the City of Cupertino in order to improve flood protection and improve pedestrian and bicycle traffic on the bridge.
Bollinger Road crosses Calabazas Creek between Miller Avenue and South Blaney Avenue. The reconstruction project included both work in the creek (just upstream and downstream of Bollinger Road) and on the bridge itself.
Bollinger Road was widened to provide more room and safer passage for pedestrians, bicycles and vehicles. To do this, the bridge was extended downstream by adding a concrete box culvert (a drainage system that supports the bridge) and retrofitted the remaining portion of the bridge. The undersized portion of the bridge on the southern, upstream side was replaced and will provide capacity for the passage of 100-year storm water flows to prevent road flooding and bridge overtopping that has occurred in the past. The project also improves wildlife habitat by revegetating the banks along the creek with native plants.
The reconstruction project was scheduled to be completed over the course of two construction seasons, between June to mid-December 2007 and then April to fall 2008. Work was suspended in the winter due to seasonal flows in the creeks which are heaviest during that time but, more importantly, to minimize disturbance to fish and wildlife