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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 />Electrical Requirements <br /> <br />Electrical components required at each pump station will include a main service <br />disconnect and meter (as specified by the local electrical utility), transformer, and service <br />panel for the previously mentioned components. The pump station skid will include the <br />control panel for proper operation of the pump system and will require 460 volt, 3-phase <br />power. <br /> <br />Secondary Supply Transmission System <br /> <br />A conceptual transmission pipe network has been developed to cover all areas of <br />service as part of this study. The pipe routing follows the existing City of Lamar grid for <br />streets and alleyways. Railroad crossings will be avoided by augmenting existing well <br />water sources on the north end of the City, and utilizing the Fort Bent canal raw water <br />source to the south of the tracks. New crossings under State Highway 287 are <br />minimized in the conceptual pipe routing network. Damage to existing streets will be <br />minimized by utilizing existing alleyways rather than streets wherever possible. <br /> <br />The pipe material used for the feasibility study and cost estimates is C900 and C905 <br />pressurized PVC pipe. Depths of pipe will range between 24-inches and 30-inches <br />depending on size of pipe. The secondary supply system will be winterized annually to <br />protect the pipe and components from freezing. The maximum velocity for water in PVC <br />pipe is recommended not to exceed 5 FPS; the secondary supply system will be <br />designed not to exceed this velocity. <br /> <br />Each property in the City of Lamar service area will be provided with a water service line <br />from the distribution piping system. The size of service line for each property has been <br />conceptualized based on the lot size and Water Use Classification. <br /> <br />A total flow rate of approximately 19,500 GPM is required to serve the irrigated acreage <br />within the overall City of Lamar service area. The proposed pressurized system from the <br />raw water source from the Fort Bent Canal to service all properties south of the railroad <br />tracks will include three new water storage reservoirs, four new pump stations, and a <br />network of PVC pipelines and fittings. The proposed pressurized system expansion from <br />the existing well water sources to service all properties north of the railroad tracks will <br />include three new water storage reservoirs, new well pumps and irrigation pumping <br />stations, and a network of PVC pipelines and fittings. The pump stations and storage <br />reservoirs will be located where acquisition of property is not required, and where they <br />will provide optimum access to the existing Fort Bent Canal or established well water <br />sites. <br /> <br />A hydraulic model has been developed to determine the optimum pipe sizing based on <br />the developed pipe routing and existing and proposed reservoir locations. After the <br />conceptual pipe r~uting was determined, anticipated flow demands in the system were <br />assigned to nodes on the pipe network. These demands were assigned based on the <br />overall irrigation demand within the Water Use Demand Zone boundary and logically <br />distributed throughout each demand zone area. Several iterations of the hydraulic model <br />were run using different demand parameters to optimize the transmission piping system. <br />Figure 7 shows a color-coded version of the hydraulic transmission system. The <br /> <br />Aqua Engineering, Inc. <br />and Colorado State University <br />May 19, 2004 <br /> <br />Secondary Supply Feasibility Study <br />-29- <br />