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. . . ITEM 12()()"hp System 6OO-hp System Transformer KVA Capacity 1500 750 Monthly KV A Charge 52,500 51,125 Pumping Capacity 258 AF/Day 127 AF/Day Monthly Demand Charge (for 3 pumping molllhs) 510,255 55.365 Energy Charge per Day (for pumping days) 5841 $461 Total Volume of Water Pumped per Year 14.698 AF 7.637 AF TO!a1 Annual Electrical CostS 598,987 $53,851 Pumping Cost per Acre Foot $6.73 $7.05 As previously mentioned. these rates are applicable only for the given assumptions because rates will vary according to usage. Should the volume of water pumped be less than lhe volumes shown in lhe above table, lhe cost per acre-foot of the water will increase. Electrical east are elevated because of the minimum monthly charges that must be paid in months when no pumping llI1ces place. To eIimate these off-season charges, the cost of diesel engines to operate lhe same pumps was investigated, The initial cost of lhe diesel engines and pumps is higher. but operating costs per acre.foot are nearly constant throughOUt the range of pumping capabilities. The cost of operating the 1200-hp system is appromnately $4.85 per acre.foot and the cost of operating the 600-hp system is approximately 55.00 per acre.foot. ~r COIWdering the variations in operating costs; four alternatives for lhe pumping station were considered: 1) consll'UCt a pumping station using REA electrical power and two 600 horsepower pumps wilh a capacity of 130 cfs. 2) consrruct a pumping station using REA electric:a1 power and two 300 horsepower pumps wilh a capacity of 60 cfs, 3) constrUct a pumping station usin: two 600 horsepower diesel powered pumps wilh a capacity of 130 cfs. 4) conslI'llCt a pumping station using two 300 horsepower diesel powered pumps wilh a capacity of 60 cfs. A subjective evaluation of the alternatives follows: I. A pumping s!arion utilizing two 600 horsepower electric pumps would enable WRCC to pump appromnarely 260 acre.feet ofwacer per day from Big Windsor Reservoir. At this rare, lhe J 4.700 acre.fea of available warer could be pwnped in less than 60 days at a cost of approximately $11.93 per acre.foot. Poudre Valley REA would provide primary metering service to lhe site and WRCC would be required to purchase and maintain a transformer sized to serve lhe high-voltage motors. A monlhly minimum KV ^ charge of S1.50 per KV A would be assessed by REA for the 1500 KV A transformer. Advanrages of this option are that the high-vol!age motOrs are slightly more efficient than lower voltage motorS resulting in lower operating costs. The disadvantages of the high voltage motors are that the owner is responsible for all maintenance and service required on the transformer. Service and pans on high volrage equipment is not as readily available as for standard 4 -~ "