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SOUTH PLATTE BASIN <br /> 1 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of-0.6 indicates that for December SOUTH PLATTE RIVER BASIN <br /> the basin water supplies were slightly below normal. s S"''°'"`t"Supply'"'"`Nlatory <br /> • <br /> Reservoir storage, the key component in this basin in 4 <br /> computing the SWSI value,was 103%of normal on December W 3 . +r ' - <br /> 31. Storage in the major plains reservoirs, Julesburg, North = . 1' <br /> Sterling, and Prewitt, increased by 11,259 acre-feet during 2 V 7 E r, . AIDecember and are at 56% of capacity. Storage in the major 1 1upper basin reservoirs, Cheesman,Eleven Mile, Spinney, and I p - <br /> Antero, increased by 58 acre-feet and are at 83% of capacity. . _, ,. <br /> J <br /> The Natural Resources Conservation Service reports January . <br /> cc 1 snowpack as 62% of normal. The mean daily flow of the o -z <br /> South Platte River at the Kersey gage was 695 cfs, as "3 <br /> compared to the 1961-1993 December average of 812.)cfs. <br /> JANBS JAN17 JAMS JAMB JM4° JAN99 .141192 JAN93 JAN94 J1N95 <br /> Flow at the Colorado/Nebraska state line averaged 236 cfs. - tIONTWYEAR <br /> The month of December did not receive appreciable <br /> precipitation. The trend for mountain snow pack was <br /> downward through the end of the month and into the first <br /> days of January. While the South Platte main stem <br /> maintained close to normal stream flows, flows in the SOUTH PLATTE RIVER NR. KERSEY <br /> YEAR <br /> tributary basins were below normal. Reservoir storage 4. �"WATER <br /> increased significantly during December with the South Platte ,pp <br /> main stem reservoirs able to increase storage by over 50,000 350 , <br /> acre-feet. Agricultural reservoirs are at about 56%of capacity, <br /> ..----------17/1_. <br /> and main stem municipal reservoirs stand at about 84% of i 3°° <br /> capacity. Continuous calls existed on the South Platte from t "° <br /> Denver upstream. Due to low tributary flows storage on g no <br /> tributary reservoirs progressed much slower than on the main i 1s, • <br /> stem. By the end of the month the weather was cold enough <br /> that ice was becoming a problem for reservoir filling. ,pp <br /> Outlook ° ` <br /> pet IAr. pee Jan Feb Lerch <br /> Without greater than normal increases in snow pack, 11>.1 <br /> the outlook for next year's runoff is guarded. `�"em `' Avo x ' <br /> 165 <br /> Administrative/Management Concerns <br /> The supply of water in the tributaries continues to be <br /> low. On South Boulder Creek this has caused the Farmers Representative Reservoirs <br /> Reservoir and Irrigation Company to alter their winter sop South Platte River Basin <br /> borrowing program with the city of Lafayette so that water n°- <br /> can not be borrowed against Marshall Reservoir. The inflows 2°° <br /> have dropped to below 4 cfs. "°_ <br /> The flow on the North Fork of Clear Creek has 1 1 <br /> 60 <br /> -.7/Areached levels low enough to make it difficult for Black Hawk a3 '1 <br /> to get their decreed water rights and meet the needs of the 12° <br /> town. 2 .°\ 77 f <br /> Meetings between the states of Colorado, Nebraska, 3 sf <br /> and Wyoming regarding the effort to address endangered /\ 77 <br /> species continue to be held each month. Some progress is 2° <br /> being ^7\ ' \\ &\ 7 made and there appears to be support for the ° ^may r/ <br /> Oillon IUreeteath Eleven Mile Che•wian Jackson Barr Lake <br /> development of a program that incrementally grows as <br /> knowledge and resources become available. This approach is ® 'y" ® '�""���te <br /> aimed at getting something done now while learning more <br /> about the issues and exploring what additional resources may <br /> be needed. <br /> 3 <br />