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<br />"apples-to-apples" basis for different size taps. For example, Copper Key Village may <br />physically consist of a single tap on the system, but in practice represents multiple users <br />or SFE's of the system. We suspect that the 3.8 persons per tap is a direct reflection of <br />a miscalculation of the SFE's within the system. <br /> <br />Although the 3.8 persons per tap ratio is very high, City staff believes the City will have <br />a higher ratio of persons per tap due to the nature of its residents. In taking the analysis <br />further, typical values of annual water use per household is generally expected to be 0.5 <br />to 0.6 ac-ft, which includes outside irrigation. If the City has a higher person-per-tap <br />ratio, logically the water use per tap should be equal to or slightly higher than this range. <br />The current calculation is 0.3 ac-ft per tap. Another element of the City's action plan will <br />be to figure out this discrepancy. <br /> <br />Another part of this discrepancy is related to the fact that the City does not know the <br />number of multi-family or apartment units, or SFE's per tap. Typically, water use for <br />multi-family is estimated by determining its proportionate share of an SFE, which is <br />approximately 0.8 ac-ft per multi-family unit. Since the City does not know the number <br />of multi-family or apartment units per tap, the numbers are inaccurate. <br /> <br />Due to the "out-of-norm" numbers, assumptions were made to project residential water <br />demand. The persons-per-tap was reduced from 3.8 to 3.1 from 2007 through 2030. In <br />addition, a 0.6 ac-ft per tap water use is used. These projections result in a residential <br />per-capita water use of 173 gpcd. <br /> <br />Table 4.2 utilizes these planning numbers in combination with predicted growth to <br />estimate future residential water demand. <br /> <br />Clear Water Solutions, Inc. <br />City of Fort Lupton <br />2007 Water Conservation Plan <br /> <br />19 <br />