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Alan Plummer Associates, Inc. <br />Water Master Plan Update 2016 <br /> <br />The City received the variance in June 2015. However, the ACR only applied to the water <br />supply requirements and did not address pumping and storage capacities. The City has <br />adequate supply, pumping, and storage capacities under the previous TCEQ rules but has <br />deficiencies in each under the revised TCEQ rules. For the purposes of this Water Master Plan, <br />it is assumed that variances for the pumping and storage capacities can be obtained in the <br />same manner that the variance for water supply was obtained and therefore no current <br />deficiencies need to be remedied. <br />The planning horizon for this Water Master Plan is 2035. Population projections were based on <br />those identified in the 2014 Water Conservation Plan and are shown in Table ES-1. <br />Table ES-1: Water Population Projections <br />Year Population Annual Rate of Growth <br />2013 53,540 - <br />2020 71,117 4.14% <br />2025 77,968 1.86% <br />2035 92,989 1.78% <br /> <br />The per capita daily consumption targets from the 2014 Water Conservation Plan were also <br />used in determining the projected water demands. The demands were distributed throughout <br />the service area based on information developed for the 2013 Comprehensive Plan concerning <br />growth areas, employment areas, and known developments. The resultant demands are shown <br />in Table ES-2. <br />Table ES-2: Projected Water Demands <br />Year 2020 2025 2035 <br />Average Day (AD) 5,828 gpm, 6,683 gpm, 7,683 gpm <br />Demand (gpm, mgd) <br />8.4 mgd 9.6 mgd (11.1 mgd) <br />9,204 gpm, 10,961 gpm, 12,616 gpm, <br />Maximum Day (MD) <br />1 <br />Demand (gpm, mgd) <br />13.3 mgd 15.8 mgd 18.2 mgd <br />Peak Hour PH 12,126 gpm, 14,223 gpm, 16,872 gpm, <br />2 <br />Demand (gpm, mgd) 17.5 mgd 20.5 mgd 24.3 mgd <br />MD:AD Multiplier <br />1.58 1.64 1.64 <br />(system wide average) <br />PH: MD Multiplier <br />1.32 1.30 1.34 <br />(system wide average) <br />1 <br /> The MD:AD ratio is 1.51 in all areas except La Cima. The La Cima Development Engineering Report stated the <br />maximum day to average day ratio is 2.92. <br />2 <br /> The PH:MD ratio is dependent upon the diurnal curve assigned to each given node. The exception is the La Cima <br /> <br />Development, whereas the Engineering Report stated the PH: MD ratio is 1.71 within their planned development. <br /> <br />iv <br />m:\projects\0600\022-01\doc\report\draft\draftmasterplan-v15_hef.docx <br /> <br />