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ARKANSAS BASIN January, 1998 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 0.8 indicates that for December the ARKANSAS RIVER BASIN <br /> basin water supplies were near normal. The Natural s Sur''«Motor S"°°IY Index NI FtorY <br /> , <br /> Resources Conservation Service reports January 1 snowpack , <br /> as 135%of normal. Flow at the gaging station Arkansas River 3_ '' - L <br /> near Portland averaged 459 cfs, as compared to the long term , 1 <br /> average of 394 cfs. Storage in Turquoise,Twin Lakes,Pueblo, 2 _ <br /> -�— X r <br /> and John Martin reservoirs totaled 218% of normal as of the Y. 1- ' -"""", . -I, <br /> end of December. g ° "` iI1 ' ' - "w �i L <br /> Soil moisture conditions continue to remain fairly wet ' III 101 '' <br /> -1- 1, r <br /> for most of the Arkansas River basin thus far this winter. a 2_ ' i <br /> Stream flows also continue to remain at or above average for a <br /> this time of year. _3- <br /> -4 i..................... ... ..... <br /> JAN89 JAN90 JAN91 JAN22 JAN93 JAN94 JAN95 JAN96 JAN97 JAN98 <br /> Administrative/Management Concerns Y <br /> The Fryingpan-Arkansas Project's water right for <br /> Pueblo Reservoir began storing water on December 15, <br /> corresponding with the beginning of water being physically <br /> spilled from John Martin Reservoir. Through January 8 over <br /> 18,000 acre-feet of native water has been stored in Pueblo ARKANSAS RIVER NR. PORTLAND <br /> Reservoir. Except for minor demands, the Arkansas River is is. <br /> FLOW eY WATER YEAR <br /> essentially being dried up below Pueblo Reservoir. 140 _-IMMi <br /> 130 ----_� <br /> John Martin Reservoir continues to spill those flows 120 r--�_� <br /> accruing to the river below Pueblo Reservoir. Current releases 11O ��� � <br /> are 500-800 cfs,with 800-1,000 cfs crossing the stateline into to 1O0 ---�- <br /> Kansas. p 4 90 --�-�— <br /> The current administrative situation is expected to 90 ll�i-- <br /> continue until irrigation season begins in March. '° ,dIV_--- <br /> Public Use Impacts 50 //����� <br /> Some minor farm land losses and possible flooding are 30 %�-=== <br /> expected below John Martin Reservoir due to the continuing 26 �- <br /> OCt Pbv Dec Jen Feb March <br /> spill. The Corps of Engineers release limit is 3,000 cfs below MONTH <br /> 0 WET(1994) O OFY(1977) ♦ AVG x 1298 <br /> the dam, yet encroaching farming and narrowing of the <br /> historic channel produce some damage well below this limit. <br /> The extended nature of these spill releases are hoped to clean <br /> and redefine the natural channel somewhat. The Corps are <br /> currently studying this reach of the Arkansas River to REPRESENTATIVE RESERVOIRS <br /> determine if any mitigating actions are necessary or 350 AiYAN5A5 FIVsi eASIN <br /> appropriate. <br /> M <br /> "Ertl 200_ <br /> .0 <br /> I <br /> \ <br /> h2 <br /> j~ 1s0- <br /> / ./ N <br /> 50 <br /> ° <br /> John Mort In P4eb I Tuauo l so ToIn Ls.. <br /> ® Avg. 12/31 Contents ® 12/31/97 Contents <br /> 4 <br />