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• <br /> SOUTH PLATTE BASIN September, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.4 indicates that for August the SOUTH PLATTE RIVER BASIN <br /> basin water supplies were above normal. Reservoir storage, 5 Sz-,aa Water Supply'"°'°`"latery <br /> the major component in this basin in computing the SWSI 4 <br /> value, was 110%of normal as of the end of August. Storage `- <br /> in the major plains reservoirs: Julesburg, North Sterling, and . r �.,.�.: <br /> Prewitt, decreased by 38,840 acre-feet during August and are 2-•:[ E .4. 4:L ' <br /> at 41% of capacity. Storage in the major upper basinreservoirs: Cheesman, Eleven Mile, Spinney, and Antero, Il ° um , ` <br /> decreased by 6,427 acre-feet and are at 95%of capacity. The _ rr` M <br /> mean daily flow of the South Platte River at the Kersey gage _ <br /> was 797 cfs, as compared to the long term average of 642 cfs. a 2 i <br /> Flow at the Colorado/Nebraska state line averaged 398 cfs. -.- <br /> Stream flows in the tributaries and mainstem -4 .................... .. ... -- <br /> JAN85 JAN90 JAN/1 JAN92 JAN83 JAN91 JAN95 JAN9C JANA7 JAN98 <br /> . continued at average or above average levels during August. ION1,,,,/Fj,R <br /> Flow of the South Platte at Kersey at the beginning of the <br /> month was unusually high, approximately 2,000 cfs, due to <br /> the wet conditions,but returned closer to seasonal norms,470 <br /> cfs, by the end of the month. <br /> Due to the high flow conditions, there were no calls SOUTH PLATTE RIVER NR. KERSEY <br /> on the South Platte during the first half of August. This is 2.8 - FLOW BY MAC YEAR <br /> very unusual since August, along with July, often are the 2.6 - <br /> months with the most senior calls. The only call during the 2. <br /> 4 ✓ <br /> 2.2 <br /> second half of the month was an 1885 Burlington bypass call 2 <br /> which is a very junior call for this time of year. There was no z 1.6 . <br /> call below Kersey at all during August which is also very o i ,.5 <br /> .4 <br /> unusual. LL' _W 1.2 <br /> �V <br /> 5 1 <br /> Outlook I °.0 ' <br /> Due to an excellent water year, reservoir levels are r <br /> 0 4 �.a <br /> high for this time of year. The excellent reservoir carry over 0.2 -��' <br /> will provide for a good start to next year's water supply. It is °• - <br /> Oat Nov Ow Jan Feb March AprlI May June July Aug Scot <br /> expected that reservoirs should be able to refill this winter MONTH <br /> without significant difficulty. NET c1 o °Rr[lssq A AVG x 1+t9s <br /> Crop production is expected to be high this year to " '' <br /> the South Platte drainage because of the favorable weather <br /> conditions. Unfortunately,prices for most crops are very low <br /> which reduces or eliminates profit for many farmers REPRESENTATIVE RESERVOIRS <br /> 50=4 PLATTE RIVER BASIN <br /> 260 <br /> 240�.��\\� <br /> 220 <br /> 200Ai 180 �\un160-/f�\\\` <br /> .2 140 <br /> h F /// <br /> f v 100 <br /> ' A <br /> 60 <br /> 40-// \ j \ /J // \\\ <br /> 0,t len Norcetaoth Eleven MI le Chessnan Jackson Burr Lake <br /> ® Avg. 8,71 Contents ® 0/31/95 Contents <br /> 3 <br />