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<br />I <br /> <br />!. <br /> <br />. <br /> <br />" . <br /> <br />. <br /> <br />PROPOSED SCOPE OF WORK <br />TOWN OF NUNN WATER SUPPLY STUDY <br /> <br />I <br />I <br /> <br />I NTRODUCTI ON <br /> <br />The Town of Nunn has requested assistance from the Colorado Water <br /> <br />'. <br /> <br />Conservation Board to detennine "a sufficient supply of good quality water in <br /> <br />the Town of Nunn for domestic use that will mE!et State Health Department <br /> <br />Standards and allow for future growth". <br /> <br />I <br />I <br /> <br />The present water supply is derived from two groundwater sources: one <br /> <br />'" <br /> <br />source is two shallow wells pumpi ng from the :iouth Pl atte Ri ver tri butary <br /> <br /> <br />groundwater (approximately 80 gpm each),'and the second source is a deep <br /> <br />well (...... 800') in the Laramie/Fox Hills formation ('" 10 gpm). The water is <br /> <br />- <br /> <br />chlorinated and pumped to a 50,000 gallon storage tank for distribution. <br /> <br />I <br /> <br />The distribution system consists mainly of cast iron pipe constructed in the <br /> <br />'early 1920's with some more recent installation of pve and galvanized pipe. <br /> <br />The "mains" vary in size from 6" maximum to 2": Inspection of the cast iron <br /> <br />. <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />pipe during the more recent construction has shown that the pipe is in <br />excellent condition after many years of service. Only minor leakage problems <br />have been identified. The current distribution system, which has been mapped <br />by the Town, also consists of water meters for all the users. <br /> <br />Based upon the current population of 120 families (300 to 350 persons), <br /> <br /> <br />the present well system appears to be capable of supplying the current demands, <br /> <br />- <br /> <br />including maximum hour demands. However, the 50,000 gallon storage will not <br /> <br />provide enough capacity to meet the minimum fireflow demands (500 gpm for one <br /> <br />hour) plus consumption at the maximum daily rate. In addition, the fireflow <br /> <br /> <br />demand of 500 gpm will create a serious pressure loss problem in the portion of <br /> <br />I <br /> <br />the system with less than 6" diameter water mains, especially in any "dead-end" <br /> <br />mains. <br /> <br />. <br />