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Alan Plummer Associates, Inc. <br />Water Master Plan Update 2016 <br /> <br />2.2 CURRENT SYSTEM OPERATION <br />The City currently operates seven pressure planes within the water distribution system, as <br />described in Table 2-1. This WMP provides the City with guidance to reduce the number of <br />pressure planes and consolidate operation of the system over the coming years. Chapter 6 <br />describes these recommendations within each future modeled year. <br /> <br />Table 2-1: Existing Operational Pressure Planes <br />Pressure Plane Nominal Operational Hydraulic Grade (ft.) <br />SWTP (Main) 810 <br />Upper (Comanche) 936 <br />Lower McCarty (McCarty Well) 857 <br />Upper McCarty (Estates of San Marcos) 948 <br />Oakridge 889 <br />Deerwood 888 <br />Kingswood 1060 <br /> <br />In addition to the above-described planes, the City also has a few areas that operate at a lower <br />hydraulic grade than the parent pressure plane, such as the area around the Municipal Airport <br />(SWTP) and the Oak Ridge subdivision (Upper). These areas are served via a PRV. <br />Generally, the system is operated as follows. Raw surface water delivered to the SWTP is <br />treated and pumped into the SWTP Pressure Plane and into the Cottonwood, Comanche, and <br />Oakridge tanks. The Cottonwood Elevated Storage Tank (EST) and Comanche Standpipe Tank <br />both serve as elevated storage for the SWTP Pressure Plane at a hydraulic grade of 810-feet. <br />From the Comanche Tank, water is pumped again into the Upper Pressure Plane and into the <br />Ranch Road 12 EST, which serves as elevated storage for the Upper Pressure Plane. Water <br />also bleeds down from the Upper Pressure Plane through the Purgatory PRV into the McCarty <br />Lower Pressure Plane and into the McCarty Tank. From the McCarty Plane, the water is <br />pumped again to the McCarty Upper Pressure Plane. <br />From the Oakridge Ground Storage Tanks (GSTs), water is pumped into the Kingswood <br />Pressure Plane. Some of the water pumped from the Oakridge Tanks bleeds down into the <br />Oakridge and Deerwood Pressure Planes via PRVs. <br />When necessary to meet demand, groundwater from the Soyars well is pumped into the Soyars <br />Tank and repumped into the SWTP Pressure Plane. The other well sites also supplement the <br />surface water in the system when local demand conditions dictate need. <br />2-3 <br />m:\projects\0600\022-01\doc\report\draft\draftmasterplan-v15_hef.docx <br /> <br />