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SOUTH PLATTE BASIN <br /> "asinwide Conditions Assessment: <br /> The SWSI value of 3.0 indicates that for October the SOUTH PLATTE RIVER BASIN <br /> index <br /> basin water supplies were above normal. Reservoir storage, 5 Surface 9 t" `'p°'Y "'.terry <br /> the major component in this basin in computing the SWSI <br /> value,was 115%of normal as of the end of October. Storage hi it <br /> W 3 III I, IIIII 111,1 <br /> in the major plains reservoirs, Julesburg, North Sterling, and III 111. IIII 11111,1 <br /> I, dim i rm IIIII Humn <br /> Prewitt increased by9,837 acre-feet duringOctober and are 2 III 11 LII11111 n II i1 1, II MI Intl IIIIIII <br /> 1111 II U1111111 1 1111 Ill 1 nl 1111 I 1 1111 1 II 11111 11111n <br /> flit 11 111111111 1 1111 In1 11111„ 111111 1,1111111 11 1lhll 1111111 <br /> at 45% of capacity. Storage in the major upper basin y n11 11 111111111 1..11111. IIII 11111, .,IIIII IIIII11111 I 11111 1111111 <br /> 1111 11 1111111111'1111111111 Inf 11111,1' '111111, 11111111111 11 :1111,11, 1111111 <br /> reservoirs, Cheesman, Eleven Mile, Spinney, and Antero, p IIII 11 IRII!Illt IIIIIII II 1 IIIIIi 11 Ilfll i iIIIIIU I111111111 0, 11111.111 I111+11 <br /> decreased by 1,520 acre-feet and are at 85%of capacity. The 1;;II l i <br /> mean daily flow of the South Platte River at the Kersey gage <br /> •was 901 cfs, as compared to the long term average of 840 cfs. o -2 <br /> Flow at the Colorado/Nebraska state line averaged 825 cfs, -3 <br /> compared to the long term average of 289 cfs. -4 <br /> JANS? JAMB/ JAN69 JAN90 JAN91 JAN92 JAN93 JAN94 JAWS JAN96 <br /> The irrigation season was completed in October. As IDNTW YEAR <br /> in many years, this October's water supply was adequate <br /> throughout most of the South Platte basin downstream of " <br /> Denver to meet demand. There was no mainstem call the <br /> whole month downstream of Chatfield Reservoir. In summary, <br /> this has turned out to be an almost ideal year in the South SOUTH PLATTE RIVER NR. KERSEY <br /> Platte basin as far as water supply for irrigation. Stream flows 210 FIRST NORTH TIE wATwYEAR <br /> 200 <br /> continue to be at or above average. 19G90 <br /> 1.30 <br /> With the end of the irrigation season, diversions are 170 <br /> now primarily for storage and recharge except for continued 1 <br /> 60 <br /> municipal diversions. Significant recharge has already ' ;3. <br /> occurred along the South Platte due to the good flow Y ;;o <br /> onditions. Storage has began on those tributaries which had g ' <br /> Lot already begun storing. Reservoir levels on both the <br /> mainstem and tributaries continue to be at or above average o <br /> for this time of year. 3° <br /> O <br /> 20 <br /> f 4 r� <br /> utlook <br /> OCTOBER 1996 OCT.AVG. ('61-'95) HIGH(19B5) LOW(196S) <br /> Basin administrators do not anticipate difficulties in <br /> filling storage reservoirs on either the mainstem or tributaries <br /> unless there is significantly below average precipitation this <br /> coming winter and early spring. This includes Jackson and <br /> Milton Reservoirs, two large reservoirs off the South Platte <br /> mainstem which had been drawn down for repair work. Representative Reservoirs <br /> South Platte River Bac.n <br /> 240 <br /> 220 /-\ <br /> 200 <br /> 160 r!/160 <br /> ^\` <br /> 140 <br /> i• 120 <br /> 2° &\ /\ <br /> 01 i ion Hore.toolh Ei.wn Nile Chessman Jackson Barr LA. <br /> Ir" Avp 10/31 Contents ® 1O/31i96 COnt9t9 <br /> 3 <br />