DWR_4151805 - Laserfiche WebLink

SOUTH PLATTE BASIN Basinwide Conditions Assessment: The SWSI value of+2.1 remains unchanged from the SURFACE WATER SUPPLY INDEX previous month and indicates that the current conditions are S _ South Platt'171wr awn above normal. This is the highest value recorded in the , state. Precipitation was 134% of normal for the month of - ! co - :a, r„ , September. The use of water for irrigation dropped W 'r �' r significantly going into October. The major diversions of 2. '` E. - _ C , .5.._ �� 7 -. r. water are now going into storage structures. Some ground g 1- , = 4-7. . —. , -; water recharge projects are beginning to divert water also. r—.-�-T + Cumulative flow at the key gaging station, South Platte River - .:_ 1 near Kersey, was 25% below normal for the water year, but was above the minimum flow recorded in 1964. Streamflow o 'z- at this station for the month of September was approximately - 65% above normal. Dillon Reservoir is currently storing ._._. ,.... .. about 250,000 acre-feet of usable water. Soil moisture is �""' _„,, ` �"'�' �""~ 4.0a' '"N" classified as being above normal. Outlook: The 30-90 day outlook is favorable. The scenario for water supply and demand appears to be normal. Municipal SOUTH PLATTE RIVER NR, KERSEY water supplies from the upper South Platte basin will be 2.1 1I.01 a''""T°'MA short. Flows in the South Platte River above Denver will 2.6 - �'F 2.4 likely remain low. Flows in the South Platte River below 2.2 Denver are dropping as irrigation return flows diminish. I i Some reaches of the South Platte River in the Denver metro . ,.• . area may reach critically low levels in the next two months resulting in poor water quality and increased treatment costs. �E ''' wi� ,.2 Administrative/Management Concerns: I 'Li, River calls continue on the South Platte and its tributaries. Calling rights generally switch from direct flow 0.4- 0.2 uses to storage. The interstate compact with Nebraska 0 , - adjusts on October 15 basically giving Colorado full use of °" "'" m` `�" "° "�"' vim �„ ".» July Aug s.ot available streamflow. Up to that date, flows at Julesburg are ° "16N`'911'" ' we cm+) ° 1990 required to be 120 cfs. As flows have been below that quite often, Colorado rights junior to 1897 have been curtailed. Public Use Impacts: south Platte Basin Reservoir Supp i i es Public water use should be relatively normal. Cherry 060 Creek Reservoir will continue to lower due to evaporation 240- losses. 22°'� i 120- \ br / \r ..--../A -7 -A, 7.7 - /'/ ..\\ --\\ . 777, ,,,,„ 01110n htlrMtcotn Cowan 411! Crawlrn JecisOn Garr MK! ® ,Wq. 1130 Cont*ltf ® 4/30190 COntrncr 3