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r <br /> SOUTH PLATTE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.6 indicates that for July the basin SOUTH PLATTE RIVER BASIN <br /> Surface Water Supply Index History <br /> ter supplies were above normal. Reservoir storage, the 5 <br /> major component in this basin in computing the SWSI value, , • <br /> was 107% of normal as of the end of July. Storage in the <br /> M <br /> major plains reservoirs,Julesburg,North Sterling,and Prewitt, 3~ s ." <br /> decreased by 39,459 acre-feet during July and are at 67% of 2'L ,._1 . • 1, = -4 • ,, " r- =�� <br /> capacity. Storage in the major upper basin reservoirs, 4 i _ <br /> Cheesman, Eleven Mile, Spinney, and Antero, decreased by i ° - - - '" - <br /> - <br /> 4,869 acre-feet and are at 91% of capacity. The mean daily 1 ki I k <br /> flow of the South Platte River at the Kersey gage was 963 cfs, <br /> a -2_ <br /> as compared to the long term average of 839 cfs. Flow at the <br /> Colorado/Nebraska state line averaged 95 cfs. .3 <br /> - <br /> Flows in the South Platte and its tributaries were <br /> JAN07 JAN66 JAN69 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN96 <br /> average or above average throughout the basin during July. AONTH/YEAR <br /> The situation at the end of the month was similar to that <br /> usually experienced at the end of June. While there was a <br /> call throughout the basin during the whole month, it was <br /> junior to that usually expected in July. The senior call on the <br /> mainstem was a 1876 Fulton Ditch call the later half of the SOUTH PLATTE RIVER NR. KERSEY <br /> month. In contrast, in 1994 an 1876 call was placed the last 2.8 FLOW BY WATER YEAR <br /> week of June. 2 6 r <br /> Due to the good river flows there is still significant 2 <br /> 2.2 <br /> storage in most of the irrigation and municipal reservoirs. In s 2 <br /> addition, crops are generally ahead of normal due to the hot 1.6 <br /> weather. Thus, there should not be any significant water -e 16 <br /> .,- 1.4 <br /> shortages during the year. W 5 ,2 <br /> 1 <br /> .tlook 0.0 <br /> The excellent reservoir carryover should provide for a °6 <br /> 0 4 - <br /> good start to next year's supply. Near average flows this 0 2 a • <br /> coming winter and spring will be adequate to fill most 0 1 - <br /> Oct Nov Doc Jan Feb MarCh ►crll May Juno July Aug Soot <br /> reservoirs. It is likely that there should be sufficient flows this lOATH <br /> fall to allow artificial recharge which will increase flows later 0 WET(,993) o DRY(196,J p % 7996 <br /> this year and next year. <br /> Administrative/Management Concerns <br /> The South Platte Lower River Group Inc. has REPRESENTATIVE RESERVOIRS <br /> identified several potential recharge demonstration projects 260 NTH PLATTE RIVER BASIN <br /> between Balzac and the stateline on the mainstem, and is 240-/2/� <br /> working toward diverting water for recharge this fall and next 220 <br /> spring. The South Platte Lower River Group Inc. had been 200 <br /> formed during the last year to identify and evaluate water t 160 160 A <br /> resource management and development opportunities between c i 140 Balzac and the stateline which can secure Colorado's water a g 120 '/ 7 <br /> resources under the South Platte River Comp act and meet '°°— /\ ^ <br /> / ,ti t� <br /> existing and future water needs. Funding for the group had 9 so- <br /> � 60 /�� � 7-.7 <br /> been provided by the Colorado Water Conservation Board and 4D <br /> group members. 20 \ <br /> ° I'/�\ <br /> On ion Worsetoottl Eleven Mlle Cheesman Jackson Barr take <br /> I//I Avg 7/31 Contents L..1 2,31/96 Content. <br /> 3 <br />