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<br /> <br /> <br />PART I--SUMMARY <br /> <br />PURPOSE <br /> <br />Presented in this report is a proposal for developing the, Upper South <br />Platte unit. This report summarizes the status of the feasibility investiga- <br />tions as of August 1972. The basic purpose of this special report is to provide <br />detailed information about the proposed dcvelopment for interested local, State, <br />and Federal agencies and an envirofffilental consultant now involved in preparing <br />an assessment of the environmental impact of the development. <br /> <br />1 <br />Ii <br />)i <br />" <br />If <br /> <br />AUTHORIZA TION <br /> <br />The Secretary of the Interior was authorized to conduct the feasibility <br />investigations by Public Law 89-561, 89th Congress, dated September 7, 1966. <br /> <br />~ <br /> <br />The proposed Upper South Platte unit would be a multiple-use develop- <br />ment. The functions it would serve are municipal and industrial (M&I) water, <br />power, flood control, recreation, fish and wildlife conservation,' and water <br />quality control. As shown on exhibit 1.1, the unit facilities would be located <br />in central Colorado in Jefferson and Douglas Counties primarily in the Pike <br />National Forest. The unit would be operated in conjunction with the existing <br />water supply systems of the Denver metropolitan area and would help these <br />cities meet the increasing M&I water demands through more efficient manage- <br />ment of their water resources. <br /> <br />Denver's water supply system is widespread and complex, consisting <br />of several collection systems, diversion dams, storage reservoirs and <br />tunnels. Aurora's water system includes a share of the Homestake project <br />which is being developed cooperatively with Colorado Springs. Aurora's <br />portion of the Homestake water enters the South Platte River at Elevefffilile <br />Canyon Reservoir, one of Denver's storage reservoirs on the South Platte <br />River. <br /> <br />The present transmountain operation of both Denver and Aurora water <br />supply systems involves the collection of water on the West Slope, diversion <br />of these flows into storage reservoirs; then conveyed under the Continental <br />Divide by tUImels and further conveyed through pipelines, canals, and natural <br /> <br />1.1 <br />