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Since the Cherry Creek alluvial wellfield is believed to be physically limited in dry years, it is <br />suggested that the supply be limited to 2,500 ac-ft in dry years, 4,000 ac-ft in average and wet <br />years, Aurora's utilization of the Cherry Creek non-tributary wells should be limited to 1,200 ac- <br />ft per year in dry years, 600 ac-ft in an average year and no use in a wet year. In a like manner <br />for the other wells (Senac, Griswold and Quincy), the combined use of these wells should be <br />limited 800 ac-ft in a dry year, 400 ac-ft in an average year, and no use in wet years. <br />Aurora is currently (2005/2006) performing modeling studies of future water supply/water <br />demand scenarios. Results from Aurora's in-house modeling efforts could be valuable for use <br />during development of the SPDSS model and as a check of SPDSS model simulation results. <br />Where to find more information <br />^ Procedures for determining key diversion structures and a list of all key diversion structures <br />selected is presented in SPDSS Task 3 -Identify Key Diversion Structures Overall Task <br />Memorandum. <br />^ Procedures for determining key reservoirs and reservoir systems and a list of all key <br />reservoirs and reservoir systems structures selected is presented in SPDSS Task 5 - <br />Identify Key Storage Elements Overall Task Memorandum. <br />^ Additional information on ditch and reservoir operations within the Principal Water District <br />is presented in the SPDSS Task 3 -Water District 8 Meeting Notes and SPDSS Task 3, <br />Water District 23 Meeting Notes. <br />^ Additional information on the Homestake Pipeline Imports to the South Platte Basin is <br />presented in SPDSS Task S Key Structure, Homestake Pipeline and Upper Colorado <br />River Basin Water Resources PZanningModel, Final Report. <br />REFERENCES <br />1) Aurora; "2004 Population Projections", Aurora web page at <br />http://www.aurora og v.or~/stellent/groups/public/documents/article- <br />publication/005287.pdf. <br />2) Aurora Development Council, "Aurora Planning for Tomorrow's Water Today", Aurora <br />Developments Newsletter, Fall 2002. <br />3) Aurora Water Resources Division; "City of Aurora 1994-1995 Water Supply Report." <br />4) Bishop-Brogden Associates, Inc.; An Augmentation and Exchange Plan for the Aurora <br />Cherry Creek Wellfield, Prepared for City of Aurora, November 1996. <br />5) EPA; Water Reuse at http://www.epa.gov/OW/you/reuse2.htm1. <br />6) Jerd Smith, Rocky Mountain News; "Plan Eyed to quench growing thirst", August 1, <br />2005 from rockymountainnews.com. <br />City of Aurora Operating Memorandum 22 of 29 <br />