AgdaPkt 2016-04-25 Closed and Joint SA PFA

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7.B. - Page 32 1 Project Description This connection point would be at least 15 feet from the bank of Redwood Creek. The project also includes the demolition of the existing pump station. 1.5 PROJECT CONSTRUCTION The area of potential effects (APE) for construction of the project would be within rights-of-way held by the City and state (California Department of Transportation). The APE includes all areas subject to disturbance from construction activities,including designated staging areas, construction personnel parking areas,and areas for laydown and storage.Access to the project construction areas would consist of existing paved roads and pathways. 1.5.1 Construction Access Existing paved surfaces would provide access to the project construction areas. Bair Island Road would provide construction access for work on the east side of US 101 and the staging areas for the project. Convention Way would provide construction access on the west side of US 101. Access to the City-owned parcel would be via Main Street. An estimated 6 to 12 workers would travel to and from the project site each day. Construction workers would park in designated areas within the APE or along Main Street. Trucks would access the site to remove an estimated 230 truckloads of excess soil and other debris from trenching and excavation and transport these materials to an appropriate disposal site such as the Ox Mountain Landfill in western San Mateo County. Approximately 32 truck deliveries would be needed for the wet well, drainage pipes, and pump equipment for the pump station project, and another estimated 95 truck deliveries for concrete, equipment,lighting,landscape trees,and other site improvement materials for construction of the joint-use path. 1.5.2 Construction Activities The first stage of construction would consist of construction planning and installing exclusionary fencing and temporary erosion control measures at the proposed laydown areas and the construction site. The contractor would install a wash down area at the construction entrance using potable water. Once these systems are installed, crews would then begin clearing areas to make way for construction activities and assembling equipment and materials. Pump Station Construction Construction of the stormwater pump station on Bair Island Road would precede the work of the joint-use path undercrossing. The new pump station would require excavation to install the pre- fabricated 2,900-cubic foot wet well. Pile drivers would be needed to install the temporary shoring for the installation of the wet well. Trenching would be needed for the 42-inch DIP pipe to connect the Bair Island Road storm drains to the new pump station site and to tie the 24-inch pipe into the existing discharge pipe. Excavation for the storm drain pump station would require removal of up to 400 cubic yards of materials. Assuming the use of 12-cubic yard dump trucks, the removal of 1-6 US 101 Pedestrian Undercrossing and Bair Island Storm Drain Pump Station Project