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. CHAPTER II COMPREHENSIVE PLAN remalnlng justifiable expenditure for each purpose bears to the total of the remaining justifiable expenditures, Juniper project facilities which are used jointly by more than one purpose include Juniper Dam and Reservoir, ~he section of Deadman Bench Canal from Juniper Dam to Artesia Reservoir, and Artesia Dam and Reser- voir, Juniper Dam and Reservoir would serve all project purposes, includ- ing irrigation, power, fish and wildlife, and recreation. The section of Deadman Bench Canal to Artesia Reservoir would be used jointly for irriga- tion and to supply water to Artesia Reservoir for irrigation, recreation, and fish and wildlife, The facilities serving only one purpose include the powerplant, switchyards, and transmission system for power; the Dead- man Bench Canal beyond Artesia Reservoir and the other canals, laterals, and drainage systems for irrigation; and the basic public use facilities at Juniper Reservoir for recreation, . Cost allocations to irrigation and power were limited by the costs of the most economical single-purpose alternative means of providing e~uiva- lent benefits. The single-purpose alternative considered for irrigation was the Juniper project constructed to serve only irrigation, The cost of the single-purpose alternative for power was taken as the weighted average cost of obtaining power from private steam-electric plants, with estimated costs including taxes foregone because of a Federal rather than private power development, Costs allocated to recreation and fish and wildlife were limited by the benefits to these purposes since costs of alternative developments were estimated to be higher than the benefits. In the procedure for allocating project costs, all annual benefits and costs accruing over the 100-year analysis period were converted to present worth amounts at 2 7/8 percent interest. Derivation of the preliminary cost allocation is shown in the table on the following page, Repayment . Construction costs allocated to irrigation would be reimbursable on an interest-free basis in accordance with reclamation law, The construc- tion costs allocated to power, including interest during construction. would be reimbursable with interest, An interest rate of 2.936 percent has been used in this analysis but the actual rate would depend on the rate applicable when project construction was undertaken, Both the irri- gation and power construction cost allocations would be repayable over a period of 50 years following completion of construction for power and following completion of construction and a lO-year development periOd for irrigation. The operation, maintenance. and replacement costs allocated to irrigation and power would be paid annually from project revenues, the irrigation portion directly by the irrigators and the power portion from power revenues ~ 52