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. <br /> SOUTH PLATTE BASIN April, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.1 indicates that for March the SOUTH PLATTE RIVER BASIN <br /> basin water supplies were above normal. Reservoir storage, 5 Surface Water Supply Icdsc History <br /> the major component in this basin in computing the SWSI ,_ <br /> value, was 115% of normal as of the end of March. Storage _ <br /> in the major plains reservoirs: Julesburg, North Sterling, and r 3 , -4' ' a' <br /> M <br /> Prewitt, increased by 2,732 acre-feet during March and are at 2-• , <br /> 94%of capacity. Storage in the major upper basin reservoirs: e1- • `+ `-- 1„,i - , WINN <br /> '' <br /> Cheesman, Eleven Mile, Spinney, and Antero, increased by g <br /> ° Irmo Irw IN <br /> I AMIMMOMMENIMN <br /> a�"��" <br /> : '9 it <br /> 1,133 acre-feet and are at 82% of capacity. The Natural <br /> -1- .„ <br /> Resources Conservation Service reports April 1 snowpack as <br /> 91%of normal. The mean daily flow of the South Platte River o '- <br /> at the Kersey gage was 1,210 cfs, as compared to the long -3- <br /> term average of 963 cfs. Flow at the Colorado/Nebraska -• , „_ ------.'� -T <br /> JANO9 JAN90 JAN91 JAN92 JAN93 JAN91 JAN95 JAN96 JAN97 JAN96 <br /> stateline averaged 949 cfs,compared to the long term average AONTH/YEAR <br /> of 555 cfs. <br /> The snowpack conditions remained slightly below <br /> average in March,with progressively better snowpack as one <br /> moves south in the basin. Nevertheless,the supply conditions <br /> still look fairly good with most reservoirs both on the main SOUTH PLATTE RIVER NR. KERSEY <br /> stem and tributaries being full. Stream flows in the South 7Do- <br /> FLOW ByWATER YEAR <br /> Platte River continue significantly above average due to the <br /> favorable conditions from the last couple of years. `°° <br /> Diversions during the month continued to be primarily 1 700 <br /> for municipal purposes,storage,and recharge although by the + <br /> end of the month there was some limited demand for 1 400 <br /> irrigation water. There was no call on the main stem below 2.1 <br /> 300- <br /> Denver during March. <br /> 200 <br /> Outlook <br /> 10O � <br /> Because of the higher than average flow conditions it <br /> is not anticipated that there will be a call for irrigation water <br /> Oct Npc Dec Jan Feb larch Apr 11 <br /> during April until some time in the later part of the month, if MONTH <br /> at all• CI WL�T C 1923) O DRY(19N) A AVG % 129E <br /> Administrative/Manaxement Concerns <br /> Lower than average west slope snow pack may <br /> prevent or limit the Northern Colorado Water Conservancy REPRESENTATIVE RESERVOIRS <br /> District from making non-charge water available from the 240 SOUTH PLATTE RIVER BASIN <br /> Colorado Big Thompson Project this year. This additional 220- <br /> supply has been made possible by the very wet conditions the Z00 <br /> 27\\ <br /> last few years. The water has been very beneficial in meeting i -.3�� <br /> early season demands. i 16D <br /> + 140 ///,,{�\\ 7``\ <br /> a� 120 J/ \` j <br /> Public Use Impacts h g 100 /// \\\ <br /> The Colorado Division of Water Resources in <br /> conjunction with the Colorado Water Well Contractors 3 6O <br /> Association and others conducted a meeting in Sterling 40 <br /> concerning well permitting, well drilling, and water supply �° _\ �^� <br /> issues. A second conference is scheduled in Jefferson County 0 <br /> Dillon Hor•stooth Eleven Mlle Champion Jackson Barr Lake <br /> on April 30. These meetings are an excellent source of <br /> ® Av9. 3/31 Content• ® 3/3V22 Contents <br /> information for planners,drillers,water resource professionals, <br /> and real estate agents. <br /> 3 <br />