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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 /> <br />APPENDIX A - FIP"E FLCJi'l ANALYSIS <br /> <br />In response to the concerns expressed by the Farmers Home Administration, <br />the system was re-analyzed to detennine the arrount of fire flow that can be <br />supplied. <br /> <br />For the proposed North Poudre Alternate, the maximum fire flow available at <br />the lumber yard is 2600 gpm with an existing maximum day demand of .586' gpn <br />and a 20 psi residual pressure. The differences between this rate and the <br />3500 gpn rate recomrended by ISO would have to be supplied by the existing <br />wells, the existing purq:>s or by an alternative source supplied by the <br />lumber yard or the elevator or both. If the transmission line fran the <br />tank to the town were changed to a 14 inch, the maximum fire flow available <br />during the existing max. day demand would be 1720 gpm, which is not <br />acceptable. <br /> <br />The fire flow available at the schools was also checked as a part of this <br />analysis. With a 16 inch transmission line the maximum flow available <br />during max day. demand and a pressure of 20 psi is approximately 2160 gpn. <br />According to ISO recomrendations ( the fire flow should range fran 2250 gpn <br />at the e1errentary school to 2750 gpn for the south building at the junior <br />high. With a fire demand of 2750 gpn the pressure with the proposed 16 <br />inch line would essentially be zero. If a 14 inch line is constructed, the <br />available fire flow with 20 psi pressure would only be '990 gpn, which is <br />not acceptable. <br /> <br />- <br /> <br />~ <br />