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3.2 River Channel, NPPD, and CNPPID System Capacity <br />The maximum channel capacities for the reaches of the North Platte, South Platte, <br />and Platte Rivers used to convey Program water is based on discharge rates at flood <br />stage determined by the National Weather Service, with one notable exception. The <br />flood stage discharge of the North Platte River, north of the city of North Platte, <br />Nebraska and approximately two miles upstream of the intersection of the North <br />Platte River and Highway 83 will be assumed to be 3,000 cfs. Channel improvements <br />currently under study are anticipated to increase the capacity to 3,000 cfs (currently <br />the flood capacity is approximately 1,600 cfs). This location on the North Platte <br />River is often referred to as the "Choke Point" and is done so in this report. <br />The National Weather Service provided action and flood stage charts for the <br />following forecast points in the North Platte Hydrologic Service Area: <br />• South Platte at Julesburg, CO <br />• South Platte at Roscoe, NE <br />• South Platte at North Platte, NE <br />• North Platte at Casper, WY <br />• North Platte at Glenrock, WY <br />• North Platte at Orin, WY <br />• North Platte at Henry, NE <br />• North Platte at Mitchell, NE <br />• North Platte near Minatare, NE <br />• North Platte at Bridgeport, NE <br />• North Platte at Lisco, NE <br />• North Platte at Lewellen, NE <br />BO%iLE Page 7 of 58 January 29, 2008 <br />PRRIP - Draft Water Management Study, Phase I