DWR_4151794 - Laserfiche WebLink

r SOUTH PLATTE BASIN Basinwide Conditions Assessment: The SWSI value of +1.7 indicates that the overall SURFACE WATER SUPPLY INDEX conditions are above normal. Reservoir storage, the key s South Platte River Darin component in this basin in computing the SWSI value, was ,_ 108% of average on July 1. Storage in the major plains W J. '4 1 , reservoirs increased by 20,899 acre-feet for the month. e ; '"� Storage in the major upper basin reservoirs increased by '- iiig , „• : ;; IMF 29,889 acre-feet for the month. With the exception of I"' ___ Spinney Mountain Reservoir which is at 81% of capacity, i D Iim -r— r7irl "" storage is at or near capacity. Precipitation was 149% of _,_ ' ' ` average for the month and is 90% of average for the water ,i year. Flow at the key gaging station, South Platte River near Kersey, averaged 2519 cfs for the month as compared to the -3- historic monthly average of 2971 cfs. A peak flow of 9670 cfs -4 " -- . _-- _ -- __.. JM512 JANG3 JANS4 JAN55 JAHR J4.1467 JAM22 JANOS 4060 JAII31 was recorded on June 3, 1991. Flow at the 122N115 YEAR Colorado/Nebraska stateline averaged 996 cfs for the month. Outlook: The streamflow forecast remains low throughout the basin. Irrigation began earlier than normal this year in SOUTH PLATTE RIVER NR. KERSEY Division 1 bringing senior direct diversion rights into play. now '"WATER YEAR Junior rights well be curtailed if hot,dry conditions continue. 2.a 41 2.4 2.2 Administrative/Management Concerns: 1 2 The upper basin was controlled by the Cheesman + 1.6 , /---- Reservoir call (June 1, 1889) through June 20 when the 1 1.5 I! 1.4 Burlington direct diversion call (November 20, 1885) went r 3 1.2 " into effect. As conditions became drier the Union Canal call , (November 11, 1881) located below St.Vrain Creek went into . 0.5 effect followed by the Farmers Independent call (November 20, 1876)which is upstream. This remained in effect through 0.2 the end of June. The lower basin was controlled by the D - Oct Nov Dee Jan Feb Mereh April Vey June July Aug Sept District 1 Reservoir call (December 1, 1929) until June 25 MDMTH when it was ultimately replaced by the Fort Morgan Canal call '�""" DRY1g'1 (October 18, 1882). Public Use Impacts: Public water use should be relatively normal. Flow in South Platte Basin Reservoir Supplies the reaches of the South Platte River immediately below 250 Spinney Mountain Reservoir and Cheesman Reservoir are at 2D 7 31 cfs and 48 cfs, respectively. Storage in Spinney Mountain 220A 200 Reservoir was 43,240 acre-feet on July 1, 1991. This = ,��/ \ represents a net increase in storage for the month of 16,302 a „D 77/f- acre-feet. 140 ` ....A\ r ,00 i .Ay\ • 217 ''\\ / .-\\ , ;\\ A-7 747 7/7 DI I Ion Horeetooth Eleven MI le ChMsolen Jeckeon goer Lake ® Avg. 2/30 Contents ® V3tvs1 Contents 3