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ARKANSAS BASIN • November, 1997 <br /> d <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.5 indicates that for October the ARKANSAS RIVER BASIN <br /> basin water supplies were above normal. Flow at the gaging SSupplySirfao■Water SPIY Index History <br /> station Arkansas River near Portland averaged 483 cfs, as '- <br /> compared to the long term average of 420 cfs. Storage in ,_ 3- , - 1 <br /> ' Turquoise, Twin Lakes, Pueblo, and John Martin reservoirs - - �'= <br /> totaled 232% of normal as of the end of October. 2 1 .1_..t i t , <br /> Rainfall at Pueblo continues to be above normal with 4 1- . ' ii.17. : '0-14- �"' <br /> 12.44 inches falling this calendar year (10.44 being average). g 0till �" 4 4 <br /> Current native flows on the Arkansas River are _,. <br /> approximately 500 cfs above Pueblo, and due to very low - 1 <br /> irrigation demands are approximately 1,300 cfs near Las <br /> Animas,which is the point of inflow to John Martin Reservoir. -3- <br /> These flows are producing an Arkansas River call of December -{ ,............. ._............................................................................. .... <br /> JANBB JAN99 JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN99 JAN97 <br /> 14, 1948 (John Martin Reservoir, Colorado-Kansas Compact). AOIJTH/YEAR <br /> Outlook <br /> The outlook for native river flows during the <br /> remainder of the irrigation season appears to be in the above <br /> normal range,with reservoir supplies also continuing to be in ARKANSAS RIVER NR. PORTLAND <br /> FIRST MONTH OF TM WATER YEAR <br /> the above normal range. 70 ��/// <br /> 60 /� <br /> Administrative/Management Concerns <br /> Operation of the Pueblo Reservoir Winter Water 50 <br /> Storage Program will be significantly different than normal <br /> this year. At current inflow rates John Martin Reservoir will i i 40 <br /> begin spilling from the top of the conservation pool before the 61 30 <br /> end of November. This will bring into priority the rryingpan- :15- ' / <br /> Arkansas Project's east slope storage right in Pueblo Reservoir. <br /> 20 <br /> With the Bureau of Reclamation storing in Pueblo Reservoir, ,a 7/ _ <br /> and with current dam restrictions on the reservoir, there will A A 7A <br /> be very little if any room for the normal 40,000 acre-feet ° 0eER 1997 CCT AVG. 9s- N1Gil c199+7 LOWC1978) <br /> which is normally stored by the Winter Water participants. <br /> Public Use Impacts <br /> The blizzard that struck eastern Colorado in late <br /> October effectively shut off all of the large diversions from the <br /> Arkansas River mainstem. The storm filled several of the Representative Reservoirs <br /> canals with drifted snow and dead cattle,and generally halted 900 Arkansas River Basin <br /> activity in the valley for several days. 200 <br /> 2130 <br /> 4 <br /> 420 <br /> r <br /> ► zoo <br /> e <br /> 100 <br /> 160 ti <br /> jJ 120 <br /> N ` \ <br /> � 120 <br /> 100 4■ <br /> 80 ,1 460 0 / ,\ <br /> 20 <br /> //- \\ /- \ /. .. _ ''' <br /> Joan Wart ln Puablo Tlrouol co Tw1n Lakes <br /> ® Av0, 10/31 contents ® 10/31/97 Cont.. <br /> 4 <br />