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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 />from storage, supply line capacity or both. The AWWA recommen~ations for high <br />value districts for populations up to 5,000 people are summarized in Table 3.4. <br /> <br />------------------------------------------------------------------------------- <br />------------------------------------------------------------------------------- <br /> <br />Table 3.4 <br />AWWA Recommended Fire-Flows <br /> <br />Population <br /> <br />1,000 <br />1,500 <br />2,000 <br />3,000 <br />4,000 <br />5,000 <br /> <br />Flow <br />Requi red <br />gpm <br /> <br />1,000 <br />1,250 <br />1,500 <br />1,750 <br />2,000 <br />2,250 <br /> <br />2.2 <br />2.8 <br />3.4 <br />3.9 <br />4.5 <br />5.0 <br /> <br />Total Volume Needed <br />in Gallons <br /> <br />Duration <br />(hr) <br />4 <br />5 <br />6 <br />7 <br />R <br />9 <br /> <br />Equivalent <br />in cfs <br /> <br />240,000 <br />375,000 <br />540,000 <br />735,000 <br />9<;0,000 <br />1 ,21 5,000 <br /> <br />------------------------------------------------------------------------------- <br />------------------------------------------------------------------------------- <br /> <br />If the i ncomi ng supply 1 i ne is just large enough to meet the daily peaki ng <br />requirements, then this fire reserve should be available in storage. The <br />existing condition of 650,000 gallons of storage for a 1,330 population <br />appears to be more than a~equate. From Table 3.4 it is estimated that <br />doubling of the Towaoc water user population to 2,660 people would result in a <br />recommendati on of approximately 600,000 gallons of storage reserved for fi re <br />use. The existing storage would also be sufficient for that condition, with <br />almost no residual storage remaining to assist in lowering the pipeline peak <br />flow. <br /> <br />3.3.2 Other Storage Requirements <br /> <br />As previously mentioned, there are other storag~ characteristics in the <br />tennina1 reservoir system that have a bearing on pipeline design flows and <br />pipe sizing. This storage, commonly referred to as "distribution storage," is <br />that water that has been treatel and is available for ~istribution. With a <br />20-mi1e pipeline being the single incoming supply conduit, provision must also <br />be made for emergency down time as well as for havi ng adequate storage to <br />justify using the 10-day peaking factor instead of providing capacity to serve <br />the instantaneous peak flow. <br /> <br />3-9 <br /> <br />1060c <br />