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8 <br />DRAFT-03/11/2011 Triangle Regional i'Vater Supply Plan <br />the non-residential area would be available for development. Finally, Orange County assumed a 1,000 <br />gallons per acre of developable land non-residential use rate for all of these nodes. <br />Orange County assumed a conservation factor for application to the water demand projections. The <br />County assumed that conservation efforts and increased efficiencies would have the effect of lowering <br />demand at a rate of 2.85% per decade. Even though Orange County does not plan to operate a water <br />system, the County's. projections do include some allowance for non-revenue water. This is because non- <br />revenue water will be at`~ributable to Orange County's service area due to leakage and flushing (and to a <br />-lesser extent, WTP process water used by another utility to- treat the water- sold to customers in the Orange <br />County service area). Orange County assumed a rate of 7.SA/o of total residential and non-residential <br />demand would be non-revenue water. All types ofnon-revenue water are grouped together in these <br />projections. <br />In summary, Orange County's key assumptions include: <br />• 75% ofnon-residential acreage is developable and 50-75% of residential acreage is developable- <br />• 2.35 persons per household <br />• 2 or 4 households per acre for low- and high-density residential areas, respectively <br />• 70 gallons per person per day for residential acreage <br />•- 1,000-gallons per acre for non-residential acreage <br />• 95% of service areas will be developed by the year 2060- <br />• Water conservation - 2.85% decrease per decade in residential -and. non-residential use rates <br />• 7.5% of revenue water is assumed to be non-revenue water (WTP process, distribution system <br />process and other non-revenue water) <br />Water Supply <br />Tohla d2 (lranna ('nimty Water 471nn1V fMC'r171 <br />- <br />Source ~_._ <br />Available/ . <br />2010 <br />2020 <br />2030 <br />2040 <br />2050 <br />2060 <br /> Future <br />Current7ordan Lake Available 1 1 1 1 1 1 <br />Allocation <br />Total 1.00 1.00 1.00 1.00 1.00 1.00 <br />Orange County has a Level II allocation from 3ordan Lake estimated to yield 1 MGD. <br />Future Water Supply Need <br />Tahla d4 nranue C'nnnty Future Water Sunnly Need (MGD). <br />System 2010 2020 2030- 2040 2050 2060 <br />Orange 0.00 0.00 0.59 1.42 2.20 2.92 <br />Page 3 <br />