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' 1 <br /> SOUTH PLATTE BASIN <br /> i <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.9 indicates that for September SOUTH PLATTE RIVER BASIN <br /> he basin water supplies were well above normal. Reservoir 5 _ S"'"'"`L"suaaly Index"16tory <br /> storage, the major component in this basin in computing the 4_ . <br /> SWSI value, was 115% of normal as of the end of September. fr 3, 1 . r : <br /> Storage in the major plains reservoirs, Julesburg, North . ..---•�- <br /> Sterling, and Prewitt, decreased by 5,056 acre-feet during 2 7 1 ;; <br /> September and are at 37% of capacity. Storage in the major 1 1—. <br /> upper basin reservoirs, Cheesman, Eleven Mile, Spinney, and i 0 - -, „ ^ <br /> Antero, decreased by 5,057 acre-feet and are at 85% of _ '; 7"; <br /> capacity. The mean daily flow of the South Platte River at the <br /> a -2- <br /> Kersey gage was 1,208 cfs, as compared to the long term a <br /> average of 727 cfs. Flow at the Colorado/Nebraska state line -3- <br /> averaged 1,550 cfs, compared to the long term average of 225 -4 - -.. .- ..- - - <br /> JAN87 JAN89 JAN69 JAN90 JAN91 JAN92 JAN93 JAN91 JAN95 JAN96 <br /> cfs. Stream flow conditions were far above average for the MONTH/YEAR <br /> month of September due to wet weather and return flows. <br /> Irrigation users began to curtail their use in the <br /> month of September as crops reached maturity. Except for <br /> some minor amounts,irrigation was finished by the end of the <br /> month. The irrigation call on the river become more junior as SOUTH PLATTE RIVER NR. KERSEY <br /> the month progressed until there was no irrigation call below 2.8 <br /> FLOW BY WATER YEAR <br /> Denver after September 20. The only calls on the mainstem 2.6 <br /> were above Denver for storage and direct municipal use. 2.4 <br /> 2.2 <br /> While some storage water was used in September as a 2 <br /> expected, reservoir levels continue to be above average. In : 1.8 - <br /> addition,reservoir storage has already begun in some tributary e, 1.6 <br /> 1.4 - <br /> basins. a= <br /> Tv 1.2 <br /> - 1 <br /> Outlook 1 f <br /> The high flow conditions have allowed significant 6 <br /> 0.4 <br /> recharge to occur in September. Additional recharge is 2 -----� <br /> anticipated to occur in October. Thus, the initial outlook for o — <br /> Oct Nov Oac Jan Fab L4rch Aar I1 Noy Juno July Aug Soot <br /> next year's water supply continues to be very positive. AONTN <br /> O WET[1993) O oar[19G4) 6 AVG X 1996 <br /> Administrative/Management Concerns <br /> Of minor concern at this point,Jackson Reservoir and <br /> Milton Reservoir have released water in order to allow work <br /> on their dam structures. It does not appear there will be REPRESENTATIVE RESERVOIRS <br /> difficulty in filling these reservoirs next year based on the 260 9OUT"PLATTE AIVER BASIN <br /> present stream flow conditions. 24°- <br /> 220-/� <br /> 200 <br /> „. is. /,, <br /> • 180-// <br /> Ie NO <br /> q 12o A 7 <br /> ,0.� / %7 <br /> 2a <br /> DI Ion Has.otooth Eleven Nil. Cheealan Jackeen Barr Lake <br /> ® Avg. 9/30 C066.nta ® 9/30/96 Contents <br /> 3 <br />