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c <br /> SOUTH PLATTE BASIN February, 1997 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 3.0 indicates that for January the SOUTH PLATTE RIVER BASIN <br /> )asin water supplies were well above normal. Reservoir 5 s�"""`LK Supply I History <br /> storage, the major component in this basin in computing the , <br /> SWSI value, <br /> was 115% of normal as of the end of January. LL <br /> Storage in the major plains reservoirs: Julesburg, North z- 1-__.__...,......_ : , : r ;- <br /> Sterling, and Prewitt, increased by 10,355 acre-feet during ~ -- 2 •M 7. ; <br /> ,, ...,___ <br /> January and are at 82% of capacity. Storage in the major f w <br /> upper basin reservoirs: Cheesman, Eleven Mile, Spinney, and g 0 y <br /> Antero, decreased by6,219 acre-feet and are at 81% of <br /> capacity. The National Resources Conservation Service reports <br /> e -2- <br /> February 1 snowpack as 152% of normal. The mean daily o <br /> flow of the South Platte River at the Kersey gage was 704 cfs, -3- <br /> as compared to the long term average of 774 cfs. Flow at the -i <br /> JANBB JAN89 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN96 JAN97 <br /> Colorado/Nebraska state line averaged 803 cfs, compared to ....AR <br /> the long term average of 512 cfs. <br /> The limited diversions which occurred in January <br /> continued primarily for storage, recharge, and direct <br /> municipal use. As in most years, the only call for water on <br /> the mainstem at this time was for storage and municipal use SOUTH PLATTE RIVER NR. KERSEY <br /> upstream of Denver. 450 - FLOW BY WATER YEAR <br /> 400 <br /> Outlook <br /> 350 <br /> With the continued above average snowpack a <br /> throughout the basin, and the excellent reservoir storage 300 <br /> levels for this time of year,basin administrators are optimistic o 2S0 <br /> for water supplies this year. g zoo <br /> Administrative/Management Concerns <br /> 100 <br /> The main concern of field staff within the basin has <br /> been the completion of 1996 diversion records. The Greeley 50 , _ — . <br /> office staff has focused on the attendance at annual and other D <br /> Oct Nov Des Jen Fab Mist-eh <br /> year end meetings of various Water Conservancy Districts and WNTH <br /> other water organizations within the South Platte basin. "BT c19B� 0 C19s) G % 1997 <br /> REPRESENTATIVE RESERVOIRS <br /> SOUTH PLATTE BASIN SUPPLY <br /> 240 <br /> 220- <br /> Zap <br /> 180-� <br /> s <br /> 1 1607\ <br /> i <br /> " A <br /> ,.s 120 zo\ <br /> 40-," <br /> 2 0 A // , /A// /\\\ 7•7 (//‘7 <br /> Dillon Hor.tooth Eleven Mlle Cheaalan Jackson Barr Lake <br /> ® Avg. 1/31 Contents ® 1/3v97 Contents <br /> 3 <br />