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Table 9 <br />Aurora's Pending Water Court Cases in Water Division 1 <br />Case No. Brief Description <br />02-CW-341 Quantification of Aurora's Lawn Irrigation Return Flows <br />03-CW-414 Lower South Platte Project, Conditional diversion and storage rights for Aurora's Lake Clare <br />03-CW-415 Lower South Platte Project, Conditional diversion and storage rights for Aurora Reservoir, Quincy <br />Reservoir, Platte Valley Reservoir, and East Reservoir <br />04-CW-218 Conditional diversion right at Strontia Springs Reservoir and associated storage facilities <br />Aurora's Lower South Platte Project would divert water from the South Platte River downstream <br />of Aurora near Brighton and pump it back to Aurora via a 35-mile pipeline to existing or new <br />storage. There the water would be purified for consumption. <br />OPERATIONAL INFORMATION <br />Water Demands <br />Aurora's estimated 2005 population is 300,000 people. Aurora estimates average annual water <br />demands based on 160 gallons per capita per day, resulting in a demand of approximately 54,000 <br />ac-ft for 2005. As noted above, the City satisfies this demand from a number of different <br />diversion structures and storage units. In the SPDSS modeling effort, it is recommended that the <br />City of Aurora demand be modeled as two demand nodes, one for in-house demands and one for <br />outside demands. The typical total demand pattern, used by Aurora in recent modeling, is given <br />in Table 10. <br />Table 10 <br />Aurora Total Demand Pattern in ercent of annual <br />Jan Feb Mar A r Ma Jun Jul Au Se Oct Nov Dec <br />4.8% 4.3% 5.2% 5.8% 9.9% 13.2% 15.6% 12.7% 11.4% 7.4% 4.9% 4.8% <br />Official long-range population projections for Aurora are offered through the Auroragov.org web <br />page. The population projection for 2040 is approximately 544,000. At a demand of 160 gpcd, <br />this equates into an annual water demand for 2040 of about 97,500 ac-ft. <br />As part of Aurora's 2003 acquisition of Thornton's South Park changed water rights, Aurora <br />committed itself to the provision of 7,883 ac-ft of Aurora supplies per year (consisting primarily <br />of reusable return flows from the Metro WWTP) to the City of Thornton. The contract deliveries <br />to Thornton are split 25 percent during the summer (May 1 to August 31) and 75 percent in the <br />winter (September 1 to Apri130). Also as part of the 2003 acquisition of Thornton's South Park <br />water rights, Aurora inherited various stipulated yield transfers to other parties including <br />Englewood and FRICO. Recommended representation of the stipulated yield transfers is <br />provided below. <br />Other water demands often required of municipalities are the obligations to maintain historic <br />return flows associated with the municipal use of changed irrigation water rights. Many of <br />Aurora's changed water rights in the Upper South Platte River Basin include obligations to <br />bypass a portion of the decree (instantaneous return flow), or divert and store a portion of the <br />decree for later release (delayed return flows). The return flow obligations are operated in <br />City of Aurora Operating Memorandum 19 of 29 <br />