a. Replacement of the primary raw wastewater influent 12-inch valve at the West Water Reclamation Facility (WRF). The valve replacement consists of removing and replacing the damaged 12-inch primary influent butterfly valve with a plug valve. Additionally, two (2) new 24-inch plug valves will be placed on the other raw wastewater influent force main to provide an additional means of flow shutoff and facilitate future repairs as needed. The existing pipe on either end of the valves, along with the existing 24-inch by 12-inch tee, will be replaced to accommodate the added valves. Linestops with bypass piping will be required to ensure continuous flow of wastewater through the facility during the valve, piping, and tee replacement. The intent of the design is to maintain the existing plant in service during construction activities. b. The proposed additions will include removal and replacement of one (1) 12-inch plug valve on the influent raw wastewater force main; addition of two (2) 24-inch plug valves on the other influent raw wastewater force main; removal and replacement of one (1) 24-inch by 12-inch tee and removal and replacement of 12-inch and 24-inch force main as required to accommodate new valves, tees, and restraints. Also included is linestops with bypassing operation to not disrupt flows to West WRF, resodding, removal and replacement of 6-foot black vinyl fencing and manual rolling gate, removal and replacement of air pipe concrete support pad and pipe support, open cut and patch of access drive, and other site restoration activities as detailed on the plans and required by governing authorities.
