AgdaPkt 2003-08-11 - Laserfiche WebLink

Browse Search

9AA 9 Description of Proposed Proiect The Redwood City Recycled Water Project will be implemented in multiple phases over the next several years, beginning with recycleo water delivery to the Redwood Shores area for the 2004 irrigation season. The system will then expand into the Greater Bayfront area and Central Redwood City. Figure 1 shows the three recycled water service areas. The phases are described below: Phase 1- The First Step Project (already completed and in operation) Phase 2 - SBSA permanent treatment, storage, and pumping facilities Phase 3 - Redwood Shores pipeline distribution system Phases 4/5 - Recycled water service to Greater Bayfront and Central Redwood City As noted above, the First Step project facilities (Phase 1) are already in place and will operate through the 2003 irrigation season. Some interim treatment improvements will be made at the SBSA plant to increase production efficiency during this time. The interim improvements provide increased reliability and efficiency while maintaining the 0.25 million gallons per day (mgd) treatment capacity approved by DHS. The First Step project received CEQA clearance in 1999 and is not, therefore, part of the project evaluated in this document. Phase 2 of the project includes the design and construction of permanent recycled water treatment facilities at SBSA. The facilities to be constructed include a disinfection system, pump station, and storage reservoir(s). The permanent facilities will be designed for 2 mgd production capacity, with provisions for expansion of up to 6 mgd or moreover the next 7 to 10 years. CEQA compliance for the Phase 2 treatment and pumping facilities was completed through a Categorical Exemption by SBSA in April 2002, and the storage facilities were addressed in the City's Redwood Shores Bayfront Specific Plan EIR certified in May 2002; therefore, they are not a part of the project evaluated in this document. Phase 3 of the project includes the design and construction of the recycled water pipeline system for distribution to an extended area of Redwood Shores. Figure 2 shows the proposed Phase 3 distribution system. This Phase also includes a back-up potable water supply pipeline in Radio Road, from the City's existing potable supply system to the SBSA recycled water storage facility. The anticipated usage of recycled water in the Redwood Shores area is for landscape irrigation at both public and privately -owned landscaped areas and medians, schools, and parks. On-site facilities to supply recycled water from the distribution pipelines to these customers world be installed. These on -site facilities typically consist of a smalldiameter pipeline branching off the distribution pipe, and a buried gate valve/ metering device. The size of the vault would depend on the size of the pipe serving the site. For the purposes of this document, it is assumed that the on -site facilities would be located in areas of public or private property that have already been developed with parking, driveways, and /or ornamental landscaping. Phases 4 and 5 of the project include extension of the recycled water distribution system to the Greater Bayfront and Central Redwood City areas. Figure 3 shows the anticipated distribution system for the Greater Bayfront area, and Figure 4 shows the anticipated system for the Central Redwood City area. The transmission pipeline linkage between the Redwood Shores and Greater Bayfront areas is considered part of Phase 4 of the project. A portion of this pipeline (shown in Figure 4) will be installed as part of a Caltrans highway auxiliary lane /bke path z