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0") f) ') 1 (_ -..J .; CSU Technical and EnVIronmental Studies ?roposal 2.1 NEPA Summary. Based upon previous experience Wtth NEPi\ processes, a brief memorandum "fill be prepared describing minunum NEP.\ preliminary engineering reguirements, This is necessary to make most efficient use of available information and identify gaps in exisring information. 2.2 Review Existing Information. The MW /BV team will review existing engineering/ technical reports to provide a basis for further work. This task will be conducted by the author(s) or participating writer of the reports cited. This will provide continuity and coordination in the engineering effort and ensure that no technical issues that have been previously addressed ace needlessly teexamined. A simple index of available information will be provided in an Oudook or similar database. . Water Resource Plan (MW /B&V) . Existing System Improvement Study (B&V) . System Optimization Study (MW) . Pueblo Reservoir Enlargement Study (B&V) . SECWCD Storage Study (MW) . Raw Water Delivery Study (B&V) . Update to Raw Water Delivery Study (B&V) . Williams Creek Site Assessment (B&V) . Williams Creek Water Quality Study (B&V) . Arkansas River Storage Requirements (MW) . Alternatives Assessment Study (MW) . Lake Meredith Study (B&V) . Pueblo Safety of Dams (B&V) . System Operations Study (MW) . USBR Pueblo Enlargement Study (B&V) 2.3 Storage Combinations. In this task, an engineering assessment will be conducted to identify combinations of the various storage alternatives, which when resized could together provide an ~lternate storage option. This would include engineering studies necessary to identify improvements needed for the new alternatives and a description of how the conveyance system could be integrated into the CSU system. <D~ 2.4 Alternative Screening, As part of the permitting ptocess, it will be necessary to provide a detailed description of the storage alternative screening process and the specific amount of storage needed by CSu. In addition, a description of any limitations on storage at any site will be provided. Since the screening has occurred only recendy, it will be appropriate to document the basis of this decision. 1bis will be accomplished, in part, by a review of existing technical studies and, in part, by interviews with appropriate CSU team members. A technical memorandum will be prepared to summarize this information. 2.5 Hydrologic Impacts. Team leaders for the environmental, water quality and socioeconomic "fatal flaw" studies will likely reguire specific information concerning the impact of alternatives on existing civer flows and storage levels. This information is available to Due team through previous studies conducted in conjunction with the Arkansas River Storage Requirements Study. Additional MODSIM model runs will be performed as necessary to answer remaining technical questions. 2.6 Capital and Present Worth Cost Estimates. Project costs will be reviewed for each alternative or combination of alternatives and the information will be summarized on a common cost basis. Cost estimates will include capital costs, environmental mitigation costs, recreational replacement costs, etc. In addition, a present worth analyses will be conducted to integrate long-term maintenance considerations into the economic evaluation. 2.7 Preliminary Engineering Technical Report. A Technical Report will be prepared to document and summarize the preliminary engineering work, and describe any alternative re finements. Task 2 - Produets . NEP.\ requirements memorandum . Index of existing engineering reports 8