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SYSTEM OVERVIEW <br />The City of Boulder municipal water supply system is managed and operated by the City's <br />Utilities Division of the Public Works Department. The City, through the Utilities Division, is <br />the owner of various water rights and facilities used in the water supply system. In addition to <br />the City's original rights and changed irrigation water rights, the City has ownership in several <br />other ditch systems where no change has been adjudicated. The City anticipates that this <br />additional water will help provide carry over storage for future drought cycles and provide <br />increased flexibility for the City's use of its already changed irrigation water rights. <br />Additional agricultural water rights ownership by the City occurs through the City's Open Space <br />and Mountain Parks Department, which manages over 41,000 acres of land. Open Space and <br />Mountain Parks Department actively manages these water rights as irrigation water supplies, i.e., <br />as they were historically used on farmlands around the City. This memorandum only addresses <br />the water rights and facilities owned, managed and operated by the City's Utilities Department to <br />supply potable water through the municipal system. <br />The City of Boulder system can generally be broken down into three subsystems. Key structures <br />identified in the City of Boulder System, by sub-system, are as follows: <br />1) North Boulder Creek System; <br />• Silver Lake Watershed System <br />• City of Boulder Pipeline No. l (Lakewood and Silver Lake Pipelines) <br />2) Middle Boulder Creek System; <br />• Barker Reservoir <br />• City of Boulder Pipeline No. 3 (Barker pipelines and Betasso Pipeline) <br />3) Boulder Reservoir and Main Boulder Creek System. <br />• Boulder Reservoir <br />• Boulder Feeder Canal (CBT/Windy Gap Projects) <br />• Boulder Supply Canal (CBT/Windy Gap Projects) <br />The location of the City of Boulder and major elements of its water resources system is shown in <br />Figure 1. Middle Boulder Creek extends from the Continental Divide down to the confluence <br />with North Boulder Creek, approximately six miles west (upstream) of the City. Main Boulder <br />Creek extends from this confluence east to its confluence with St. Vrain Creek, approximately 15 <br />miles east of the City. <br />City of Boulder Memo.Doc Page 3 of 30 March 9, 2005 <br />