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<br />ARAPAHOE COUNTY WATER AND WASTEWATER AUTHORITY <br /> <br />2.2 FORECASTING METHOD <br /> <br />Future water demands were estimated using Worl(sheet 2-1 (Appendix A). The most current data <br />from a variety of sources was collected in order to complete the forecast. Demand was brol(en <br />down by the different types of water use include residential and commercial (non residential). <br /> <br />Because of the large percentage of commercial use in the ACWW A service area, the forecast <br />was based on a tap equivalent (TE) basis for both residential and non-residential customers. Tap <br />equivalents are much easier for the Authority to tracl( because of the large number of day <br />worl(ers that are in the service area for only part of the day. The ratio of residential to <br />commercial demand was assumed to remain constant based on conversations with ACWW A <br />staff. <br /> <br />Non-account water was assumed to remain constant and estimated to be a percentage of the total <br />water use based on water accounting from 2004. The forecasted years are based on demands <br />prepared by Wright Water Engineering in January of 2005. Adjustments were made to the <br />maximum day demand forecasts based on a memorandum from Wright Water Engineering dated <br />January 20, 2005. <br /> <br />2.3 DEMAND FORECAST <br /> <br />This demand forecast reflects the water conservation that will be provided with the planned <br />capital improvement projects that were identified in Section 1. This forecast however does not <br />include adjustment for additional water conservation activities that will be identified within this <br />Water Conservation Plan. The adjustments from planned water conservation activities will be <br />addressed later in the plan. Figure 2-1 presents the demand forecast in graphical form. <br /> <br />Richard P. Arber Associates, Inc. <br /> <br />16 <br /> <br />ACWW A05 <br />