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II I I 1 I I I I I I I I I I' I I I I I ;' / @ SOllie EnQineerinQ Corporation Suite 200 165 South Union Lakewood, Colorado 80228 consultlnQ enQlneers 303/987-3443 Mr. UIi Kappus, P.E., Executive Director April 27, 1987 Colorado Water Resources and Power Development Authority 1580 Logan Street, Suite 620 Denver, Colorado 80203 'Final Report for the Joint-Use Reservoir and Green Mountain Exchange Projects Dear Mr. Kappus: We are pleased to submit this Final Report, as required by our contract dated June 7, 1985. A Summary Report is submitted under separate cover. These reports provide information and data on reconnaissance-level engineering and hydrology for two conceptual projects: the Joint-Use Reservoir Project and the Green Mountain Exchange Project. Preliminary hydrologic, geotechnical, engineering design and cost studies have been carried out to define project alternatives based on an approximately uniform level of investigation. The Study has progressed in the following sequence, each concluded with a task memorandum report: o Initial screening and pre-reconnaissance investigation o Hydrologic, water rights and operational analysis o Reconnaissance-level project designs and cost estimates o Comparative analysis and cost-yield relationships of alternative reservoirs and alternative combinations of water-exchange reservoirs and conveyance system. Alternative projects have been defined along with water yields and estimated costs. This will provide consistent, comparative, technical and cost data to serve as a basis to evaluate these alternatives for possible future implementation. It should be noted that no assessment has been included in the Study of the December, 1986 agreement between the Northern Colorado Water Conservancy District and its Municipal Subdistrict, the Colorado River Water Conservation District and the Denver Board of Water Commissioners nor the possible change in operation of the Shoshone Power Plant. As you are aware, ail of the work on this Study has been executed in Colorado. Thomas S. Maddock, the Principal-in-Charge of this contract for Boyle Engineering Corporation; Dan Boyd, Project Manager; Dale Diamond, Technical Director; Young Yoon, Principal Hydrologist; Chen & Associates, Geotechnical Subconsultant; and the entire Denver office staff; have greatly appreciated this opportunity to contribute to the evaluation of two such important projects within the State of Colorado. We also acknowledge the excellent support and guidance we have received from Dan Law, your Project Manager, and the project sponsors; the Colorado River Water Conservation District, represented by Eric Kuhn; and the Denver Water Board, represented by Bob Fischer; the Exchange Team Advisory Committee; and the Board of Directors of the Authority. We look forward to future opportunities to be of service. Very Truly Yours, B~LE ENGINEERING CORPORATION JU~J~ Daniel W. Boyd, P.E. Project Manager DN-C1 0-1 00-12 DWB/cec