The project is to replace the existing park entry bridge over Porter Creek with a new, full-span, concrete and steel bridge at the current crossing but well outside the banks and immediately upstream of the existing bridge. The existing bridge provides the only access to a residence and equestrian facilities and is not structurally stable enough to accommodate large emergency vehicles; the new bridge has been designed and engineered to support them (H-20 loading). The bridge will arrive onsite prefabricated. Onsite construction will be limited to bridge abutments and minor modification of bridge approaches on the existing entry road to connect with the new bridge.
Construction will disturb 0.4 acres of the developed entry area and require 110 cubic yards of net fill. No native vegetation needs to be removed. Project plans include specific BMPs to prevent erosion and sedimentation. At this time, the existing bridge will be retained so that existing tenants can access the property. Its future use/removal will be determined as part of the master plan process which is scheduled to begin this year.
The purpose of replacing the bridge is to increase the size and structural weight limit enough to accommodate large emergency vehicles. In addition, replacing the wooden bridge deck with a steel and concrete bridge deck will make it more resistant to wildfire.