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City of Rifle Water Conservation Plan
<br />Final Report -July 2008
<br />7.0 Integrated Resources and Modified Forecasts
<br />Sections 2.0 and 3.0 present potable water demand and infrastructure projections for the "no
<br />conservation" condition. This section presents modified 20-year forecasts for the "with
<br />conservation" condition. Achieving the water conservation goals of this plan is anticipated to
<br />result in infrastructure, water supply, and other savings. These savings are considered in a cost-
<br />benefit analysis of implementing water conservation in Rifle.
<br />7.1 Modified Water Demand Forecast
<br />Table 7-1 presents projected population, EQRs, and peak day water demands based on
<br />successful implementation of the water conservation measures and programs identified in
<br />this plan. Population and EQR values are unchanged from those projected in Table 2-4.
<br />The re-forecasted demands are based on achieving the following reductions in peak day
<br />demand through water conservation (as compared to a baseline value of 1,024 gpolEQR):
<br />• For existing EQRs: 5% reduction in 3 years;l0% in 7 years; ll% in 20 yrs
<br />• For new EQRs: 17% reduction n 3 years; 22% in 7 years; 24% in 20 yrs
<br />Table 7-1: Population, EQR, and Peak Day Water Demand Projections
<br />for "Conservation" Condition
<br /> Projected Projected Water S stem EQRs Projected
<br />Year Population CoGen NonCoGen Total Peak Day
<br />Demand
<br /> (capita) (EQRs) (EQRs) (EQRs) (mgd)
<br />2007 8,800 700 3,775 4,475 4.6
<br />2008 9,383 700 4,025 4,725 4.8
<br />2009 9,965 700 4,275 4,975 4.9
<br />2010 10,548 700 4,525 5,225 5.0
<br />2011 11,130 700 4,775 5,475 5.1
<br />2012 11,713 700 5,025 5,725 5.3
<br />2013 12,412 700 5,325 6,025 5.5
<br />2014 13,111 700 5,625 6,325 5.7
<br />2015 13,810 700 5,925 6,625 5.9
<br />2016 14,509 700 6,225 6,925 6.2
<br />2017 15,208 700 6,525 7,225 6.4
<br />2018 15,907 700 6,825 7,525 6.6
<br />2019 16,606 700 7,125 7,825 6.8
<br />2020 17,305 700 7,425 8,125 7.1
<br />2021 18,004 700 7,725 8,425 7.3
<br />2022 18,703 700 8,025 8,725 7.5
<br />2023 19,402 700 8,325 9,025 7.7
<br />2024 20,101 700 8,625 9,325 7.9
<br />2025 20,800 700 8,925 9,625 8.2
<br />2026 21,499 700 9,225 9,925 8.4
<br />2027 22,198 700 9,525 10,225 8.6
<br />A comparison of Tables 2-4 and 7-1 shows that by 2027, meeting the conservation goals
<br />is projected to reduce the peak day demand by almost 1.9 mgd (18%). Not shown is that
<br />it is not unti12033 in the "with conservation" condition that peak day demand exceeds 10
<br />SGM # 99055A-388 37 Integrated Resources and
<br />Modified Forecasts
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