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.yirrr+ � � - . <br />at the tap in representative Colorado Front Range communities to provide a comparative <br />basis for the economic reasonableness of alternative water supply strategies; and <br />a projection of the expected increases in customer costs over time of the groundwater <br />management alternatives. <br />Task 3: Conjunctive Use That Exclusively Uses South Platte River Water - a feasibility <br />analysis of conjunctive use alternatives that exclusively use South P[atte River water <br />The consultant will conduct a feasibility analysis of the different altematives for the <br />wnjunctive use of groundwater and South Platte River water, inctuding the timing for each <br />alternative. The consultant will compile all existing studies applicable to this task with the <br />goal to reduce duplication and to build on previous planning efforts. This analysis will be <br />conducted assuming ffrst that groundwater management Aiternative B is operational and then <br />groundwater management Ahernative C is in effect. <br />The goal is to implement a conjunctive use altemative in sufficient time to avoid a case where <br />the DCWRA Study Crroup members' customers would be charged an intolerable cost as <br />groundwater is used to a greater extent. A second determining criteria will be when the use of <br />the Denver Basin aquifers is affected by physical, water quality or other factors that limit its <br />long term effectiveness. The Management Team will define what amounts to an"intolerable <br />cost". The following aze factors the consultant will use, and the analysis the consultant will <br />conduct for any South Platte-only conjunctive use alternative(s):. <br />all physical infrastructure needs for a conjunctive use component to the same master meter . <br />location previously identified by the Management Team; <br />an assumed use of only that amount of South Platte water that can be regulated by Denver <br />Water's South Platte reservoirs and water rights without materially increasing Colorado <br />River depletions (Denver Water will provide all surface hydrology modeling data that <br />involves its water rights or structures); <br />long term effective use of the Denver Basin aquifer as an integrated component of the <br />conjunctive use concept; <br />the regulatory and institutional constraints to a"South Platte River water-only" conjunctive <br />use altemative; <br />all monetary, regulatory, and environmental costs, including costs to mitigate environmental <br />impacts and the costs to obtain any South Platte water; <br />a deternunation of what, if any, additional water resources aze needed beyond "South Platte- <br />only conjunctive use" for both the planning period through the yeaz 2050 as well as for <br />- - -- - --- -- ---- -- — <br />years beyond that time as may be identified by the Management Team. Tkus second <br />planning condition will be addressed qualitatively; <br />a"paper study" of the lazge-scale feasibility of regional ground water recharge using the <br />restilts of recent rechazge programs at Willows Water District and Centennial WSD, as <br />well as discussions with USGS and others; and <br />a preliminary design, study protocol, and estimated cost for a large scale recharge and <br />recovery demonstration project will be prepazed and submitted to the Management Team. <br />It is assumed that the demonstration project will use existing infrastructure or nominal <br />interconnections to convey renewable supplies to specific locations throughout the <br />d��vta scnpe of work 9/2l(99 <br />