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Consumptive Ilse <br />The consumptive use of Denver Water's potable diversions for in-house, residential uses is 5 <br />percent. Denver Water's monthly consumptive use is higher throughout the year due to industrial <br />uses and outdoor uses. Estimates of monthly consumptive use percentages are included in Table <br />12. <br />Table 12 <br />Municipal Consumptive Use Rates <br />Month Percent of Water Consumed <br />Jan 22 <br />Feb 22 <br />Mar 26 <br />Apr 45 <br />May 61 <br />Jun 70 <br />Jul 73 <br />Aug 71 <br />Sep 65 <br />Oct 45 <br />Nov 24 <br />Dec 21 <br />Source: Denver Water <br />Note: Consumptive use rates include municipal, industrial, and outdoor use consumption <br />The reuse of lawn irrigation return flows (LIRFs) associated with diversions has not been <br />adjudicated. Denver Water is currently analyzing LIRFs associated with its operations to better <br />quantify the amounts and locations of return flows associated with reusable transbasin supplies <br />and changed water rights. <br />Water Supply <br />The Denver Water system uses a varied water rights and water supply portfolio that is managed <br />on a daily basis to ensure demands are met and to allow operational flexibility to address various <br />infrastructure needs, repairs, down time, etcetera. Denver Water's goal is to first use available <br />South Platte River supplies before using its supplies from the western slope. Although <br />complexities of a system this large require constant monitoring, a general order of operations <br />used to meet the Denver Water demands are as follows: <br />1) Direct flow rights from South Platte River basin <br />2) Reusable effluent exchanges from Metro WWTP and Littleton-Englewood WWTP to <br />upstream diversion points <br />3) Water from various sources may also be used to replace junior upstream diversions made <br />throughout the system <br />4) Releases from storage near water treatment plants (Strontia Springs Reservoir, Marston <br />Reservoir, Ralston Reservoir) <br />5) Transbasin Deliveries (Moffat Tunnel and Roberts Tunnel) to demand or to storage <br />6) Releases from Storage (Gross Reservoir, Antero Reservoir, Eleven Mile Reservoir, <br />Cheesman Reservoir, Chatfield Reservoir) <br />Denver Water Board Operating Memorandum 34 of 40 <br />