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OG52 have averaged 341,400 acre-feet per year for the period 1941-1970. No significant reservoir storage for conservation purposes has been developed in the South Platte River watershed during this period, Flows of the South Platte River at North Platte averaged 250,100' acre- feet per year during the same period. Flows of the North Platte River at Lewellen, Nebraska, averaged 935,700 acre-feet per year during the 1941-1970 period, Flows of the North Platte River at North Platte averaged 425,300 acre-feet per year during the same period. Flows of the North Platte River have been regulated by the Central Nebraska Public Power and Irrigation District's (CNPP&ID) Kingsley Dam. Diversions at the Nebraska Public Power District (NPPD) Korty Diversion Dam near Paxton, Nebraska, reduce the flows of the South Platte River. Downstream of North Platte, Nebraska"the CNPP&ID's Diversion Dam diverts water to the supply canal for hydroelectric generation and the irrigation of about 130,000 acres. Between Brady, Nebraska, and Kearney, Nebraska, are seven diversions. Much of the natural flow and storage water which these canals utilize is diverted at the North Platte Diversion Dam and subsequently, returned to the Platte River at either the Jeffery Return located downstream of Brady or the Johnson Return located between Lexington and Overton, Flows of the Platte River at Overton have averaged 847,000 acre-feet per year during the period 1941-1970. Kingsley Dam was completed in 1941. The historic flows of the North Platte River at Lewellen and S~uth Platte River at Julesburg avesaged 912,200 acre-feet (1,260 ft Is) and 335,500 acre-feet (463 ft Is), respectively, during the period 1947-1970. The historic flows of the Platte River at Overton average 874,300 asre-feet (1,207 ft3/s) and at Grand Island, 849,800 acre-feet (1,173 ft Is) during the period 1947-1970. Flows of the Platte River at Overton have been estimated using a computer model developed by the Bureau of Reclamation which simulates the operation of facilities located on and along the Platte River and its tributaries between Lewellen, Julesburg, and Overton. Flows assumed for the pre-Narrows conditions were represented by a "near future condition" of development upstream of Lewellen and within the modeled reach of the Platte River, Historical flows of the South Platte River at Julesburg were assumed to represent the pre-Narrows flow (USBR, 1976). Exhibit 2 shows the average annual, January-April, and May-August flows at various locations within the modeled area for the period 1947-1970 under the pre-Narrows condition. 28