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<br />v-6 <br /> <br />maintain acceptable service pressure ranges, the system would be divided in- <br /> <br /> <br />to two pressure zones. The filter plant will discharge directly to the high <br /> <br /> <br />level zone with the storage tank water level at the plant controlling system <br /> <br /> <br />pressures. The lower (eastern) zone pressure will be controlled through pres- <br /> <br /> <br />sure reducing valve stations. <br /> <br />Future lines to serve developable areas are not shown since their locations <br /> <br /> <br />will depend upon plat designs. Some possible future lines are indicated and <br /> <br /> <br />the basic pipe sizes are adequate to accommodate reasonable growth economically. <br /> <br />A future storage tank of 100,000 gallon capacity is recommended to be located <br /> <br /> <br />on the high ground near the treatment plant, as shown on Drawing V-l.The tank <br /> <br /> <br />would provide storage for use in the event of emergency power or equipment <br /> <br /> <br />outage and permit some fire protection flows. This tank would also have the <br /> <br /> <br />function of providing water to the system during short term peak hourly demand <br /> <br /> <br />periods (when water use exceeds the maximum filtration rate). <br /> <br />All Year System. Although the area is still primarily a summer community, <br /> <br /> <br />there are an increasing number of year-round residents with winter usage re- <br /> <br /> <br />quirements. It is estimated that the average cover required to reasonably <br /> <br /> <br />prevent freezing during the winter is approximately seven feet. <br /> <br />The original service plan work investigated the concept of constructing part <br /> <br /> <br />of the distribution system for summer season use only. Some cost saving would <br /> <br /> <br />result through the use of shallow buried plastic pipe which could be drained <br /> <br /> <br />during freezing weather. However, a survey of Allenspark customers indicated <br /> <br /> <br />a growing trend towards year-round use--the number and dispersal of year-round <br /> <br /> <br />residents is now such that only a few shallow I ines would be acceptable. There- <br /> <br /> <br />fore, with a possible few specific exceptions, the distribution system has been <br /> <br /> <br />conventionally designed for continuous service. <br /> <br />PROJECT PHASING <br />Construction phasing will be used in the design of the water system in order <br />to mitigate high initial capital cost. Only lines needed for actual existing <br />customers will be installed in the initial program. <br />