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<br />t') '7'~ (', <br />.. i:' iJ <br /> <br />Plan of Development <br /> <br />system in the lower South Platte Basin experiences shortages of this <br />magnitude', the Colorado Water Conservation Board requested that a <br />supplemental water plan for this system be developed. <br /> <br />A 5-unit pumping plant, connected directly to the river outlet, <br />could be constructed below the Narrows Dam to provide supplemental <br />water for the Riverside irrigation system. The total dynamic head <br />would be 120 feet and the capacity of the plant would be 150 c.f.s. <br />A 54-inch, 4,750-foot-10ng discharge line would follow the downstream <br />toe of the dam, cross over the spillway chute, and discharge into the <br />existing Riverside Canal near the left abutment of Narrows Dam. The <br />discharge line would be constructed of reinforced concrete except for <br />a steel section which would extend across the spillway. A surge tank <br />would be required near the middle of the discharge line. Addition of <br />this pumping plant to the unit would require some modifications at <br />the discharge end of the river outlet works. Power would be provided <br />by a 3.75-mile, 115 kv.transmission line from the existing USBR Greeley- <br />Fort Morgan l15-kv.line and a substation in the vicinity of Narrows <br />Dam SLte. <br /> <br />By adding this feature, an average of about 17,000 acre-feet of <br />supplemental water could be pumped to the Riverside canal annually. <br />This pumpage would enable the servi.ce area to be increased from 22,909 <br />acres to approximately 27,000 acres, and tbe improvement of the water <br />supply would be from 75.5 percent to 86.2 percent of the computed <br />requirement. <br /> <br />The Riverside service area is not included in the Lower South <br />Platte Water Conservancy District. <br /> <br />Bijou Pumping Plant <br /> <br />A pumping plant could be constructed below the Narrows Dam to <br />pump water from the Fort Morgan Canal outlet works to the Bijou Canal. <br />Some preliminary cost estimates of this installation were prepared, <br />but were not refined because hydrology studies indicated that approxi- <br />mately the same quantity of water could be provided without construc- <br />tion through an exchange arrangement between Narrows Reservoir and the <br />Bijou Canal. Such an arrangement is possible since the Bijou diversion <br />facilities are upstream from the reservoir. <br /> <br />Approximately 18,000 acre-feet per year could be exchanged to <br />the Bijou system, thus providing 93.5 percent of the theoretical <br /> <br />34 <br />