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J. ,..- . . ,,;:. " ) two of the alternatives selected from the Phase I analysis. The Contractor will compile and review any additional information regarding hydrology, water rights, water demands, geology, site suitability and any other factors necessary to evaluate the selected alternative at a reconnaissance-level of detail. The Contractor will prepare design and layout studies for all proposed facilities in each alternative. Designs and material quantities shall be estimated by use of USGS seven and one-half minute quadrangle sheets as a minimum level of detail. When available, preliminary designs and detailed topography from other studies may be used. ' Facility designs will be completed in sufficient detail to prepare reconnaissance-level cost estimates for all proposed facilites with appurtenant structures and associated mechanical and electrical equipment. Costs for land acquisition, relocation of impacted roads and facilities, water rights, short-term borrowing during construction and a contingency allowance for engineering, administrative and legal expenses will be included. Costs for providing access to any U.S. Forest Service facilities which may be impacted by a project will also be included. In addition to capital costs, the Contractor will estimate the annual cost to operate and maintain proposed facilities as well as estimated costs for replacing major items of equipment at various times through the planning horizon. All costs will be referenced to a January 1, 1982 datum (or other date as directed by the State). To refine the alternatives in Phase II, the Contractor will conduct system operation studies to determine water yields and hydropower production of the proposed facilities. This will be an iterative process, in consulation with the State, in which final facility locations, dimensions and modes of operation will be detemined to optimize economic outputs and minimize adverse impacts. The operation studies will be conducted for each of the water rights assumptions developed in Task 6. Monthly tabulations will be used for a historic period of record to include at least one sequence of critical (dry) years. In consultation with the State, the Contractor will utilize the computer simulation model developed in Task 8 or such other computer model as appears to be most appropriate to perform the operation studies. During the iterative process, the Contractor shall conduct an economic analysis to compare benef its resulting from -9-