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� • E <br />Studv Purpose <br />The overall purpose of Phase II is to arrive at alternative water supply projects that could <br />help meet energy development needs, and in addition, could be used to satisfy other water <br />needs, including municipal, agricultural, and instream uses of water. To do this the <br />system of water rights, water resources, and demands for water — existing and future -- <br />will be modeled using the Colorado Decision Support System (CDSS) developed by the <br />Colorado Water Conservation Board. <br />While existing agricultural, municipal, and instream uses and water rights could be <br />curtailed as the result of the development and perfection of conditional water rights <br />owned by energy companies, Phase II will not serve to describe the impact of energy <br />development on other existing uses and water rights. It will, however, suggest <br />joint/multiple-use projects to serve those uses. <br />Phase II Proposed Scope of Work <br />Task 1: Phase I Water Demands <br />1.1 Review Phase I Report and Demands <br />1.2 Assess and confirm the water demand scenario to be used for modeling <br />purposes I <br />Task 2: Surface Water (Greg, I forgot what you wanted here — please add...) <br />Task 3: Groundwater <br />3.1 Delineate extent of tributary and non-tributary groundwater in the <br />Piceance Basin from known information, technical reports, data from <br />federal lease tracts such as CA and CB, and current research, etc. <br />3.2 Estimate quantity, quality, and suitability of tributary and non-tributary <br />groundwater to meet water demands for each energy source identified. <br />Task 4: Model Development and Runs <br />4.1 Disaggregate demands into nodes <br />4.2 Disaggregate annual demands into monthly or daily demands as necessary <br />for model. <br />4.3 Estimate consumptive use and return flow patterns and timing. <br />4.4 Determine which water rights will be used for purposes of modeling <br />4.5 Perform initial model run and identify shortages to industrial, agricultural, <br />in-stream non-consumptive, and municipal/domestic water demands. <br />4.6 Perform additional runs with one or two screened water supply <br />alternatives from Task 4 and ascertain amount of storage required to meet <br />demands and verify that adequate yield can be attained. <br />� Note: Phase I estimated water demands for Low, Medium and High energy production scenarios, for near- <br />term, mid-term, and long-term planning horizons. It is expected that for Phase II only one scenario will be <br />modeled and that it likely will be mid-term, high production. <br />