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<br />MWSI Project <br />Phase II Conjunctive Use Summary Report - DRAFT <br /> <br />August 22, 1995 <br /> <br />supplies will decrease. The exact nature of OW's unused supplies available for use outside of its <br />service area for a conjunctive use plan will be a function of its ultimate system configuration and <br />its service area demands, In addition, these estimates assume that all of DW' s unused surface <br />supplies would be available in an operational sense for a conjunctive use plan; this may not be <br />the case for some of OW's South Platte and Fraser River flows, <br /> <br />Example Conjunctive Use Scenarios <br /> <br />Based on the preliminary modeling analyses described in Appendix b to this document, <br />two example conjunctive use scenarios were developed for illustrative purposes and in order to <br />explore conceptual costs and other feasibility issues, These scenarios also allow for comparisons <br />and interrelationships between conjunctive use and other focus areas of MWSI Phase II studies. <br />It should be noted that these scenarios are for illustrative purposes only, Any geographic <br />specifics included in the scenarios do not imply willingness on the part of water providers to <br />participate in a conjunctive use plan. <br /> <br />The first of these conceptual scenarios is formulated solely to develop new yield for <br />future growth in the metropolitan area, and is centered around a new well field that would be <br />located outside the area of significant groundwater development today. For this scenario, this <br />well field is assumed to be located in northeastern portion of the metropolitan area, in areas south <br />and east of Denver International Airport ("D1A"), as shown on Figure 9, The well field was <br />selected in this location because of the relative proximity to the metropolitan area, as an area of <br />little existing groundwater development, and as an area with reasonably high values of aquifer <br />storage and yield, <br /> <br />A well field in this location was assumed based upon the average well field design <br />parameters that were developed in the Denver Basin Aquifer portion of this study, Consistent <br />with that analysis, the water supplies are to be developed from the Denver, Arapahoe, and <br />LaramielFox Hills Formations. The well field shown would produce an annual yield of60,OOO <br />acre-feet and would have a peak pumping capacity of 110,000 acre-feet. This well field would <br />extend from approximately Gun Club Road extended on the west to near Bennett on the east, and <br />from about Alameda extended on the south to 88th A venue extended on the north. A general <br />location is depicted in Figure 9. Water rights are assumed available primarily through purchase <br />from private parties, The location is not critical and can be shifted as necessary to acquire water <br />rights. <br /> <br />The collection system for this well field is assumed to be the generic system developed in <br />the Denver Basin Aquifer portion of this study, This collection system delivers these water <br />supplies to a location within the well field area for storage and treatment. This reservoir would <br />store a minimum of 12,000 acre-feet. A treatment plant would be located directly adjacent to the <br />reservoir. This treatment plant would be capable of treating the entire conjunctive use supplies. <br /> <br />37 <br />