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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />control panel for proper operation of the pump system and will require 460 volt, 3-phase <br />power. <br /> <br />The estimated annual kilowatt hours for the Phase I pump station are 2,390,764 kWh. <br />Phase II pump station estimated annual kilowatt hours are 1,945,408 kWh. Projected <br />pumping costs, based on 2004 electrical rates, are provided in the Appendix. <br /> <br />Flow and Pressure Requirements <br /> <br />Many factors will affect the proposed system components as the land is developed <br />throughout the secondary supply service area. Therefore, the following assumptions <br />were made in the hydraulic model with the intent of providing flexibility in the system at a <br />reasonable cost to eliminate future restrictions. <br /> <br />The ideal velocity range of water within the pipe network is between 1.5 feet per second <br />(FPS) and 5 FPS. A minimum pipe size of 8-inches was selected throughout the <br />network. <br /> <br />The desirable pressure at each irrigation point-of-connection is between 75 PSI and 100 <br />PSI, which is similar to domestic water pressures, However, based on the topography of <br />the proposed service area, the allowable pressure range was extended from 65 PSI to <br />120 PSI. Multiple pressure regulating valves (PRV) will be required when connecting <br />Phase III to the system. These valves will reduce the pressures in Phase III to a similar <br />range as delivered elsewhere in the system and prevent excessive pressures in the <br />transmission pipes. Without these valves, pressures in Phase III may be as high as 100 <br />PSI and 170 PSI. Phase IV will require two booster pump stations on the eastern edge <br />to increase the transmission pressure to the desired range. At these locations, the <br />pressures were found to be as low as 45 PSI. The booster pump stations could be on <br />the transmission system, or they could be located at individual developments desiring to <br />connect to the transmission system. <br /> <br />Pipelines <br /> <br />The pipe material used to estimate cost for this study includes C900 and C905 <br />pressurized PVC pipe. This pipe material is typically used for municipal waterlines and is <br />rated for installation in roadways. <br /> <br />Figure 6 shows the hydraulic model output. Flow demands and delivery pressures are <br />shown at each node and the pipe size and direction of flow are shown on the pipelines. <br />The storage reservoir and pump station locations are also shown in this figure. <br /> <br />Aqua Engineering, Inc. <br />November 8, 2004 <br /> <br />Canal Modernization Feasibility Study <br />- 24- <br />