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. 1 <br /> ARKANSAS BASIN <br /> r <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 2.4 indicates that for February the ARKANSAS RIVER BASIN <br /> basin water supplies were above normal. The Natural 5 Su^T.c..ktr Supply Index History <br /> Resources Conservation Service reports March 1 snowpack as 4_ <br /> 106% of normal. Flow at the gaging station Arkansas River , <br /> w 3- - <br /> near Portland averaged 371 cfs,as compared to the 1965-1993 • <br /> T^ .�_ <br /> average of 345 cfs. Storage in Turquoise,Twin Lakes,Pueblo, 2- = _ - ^ <br /> and John Martin reservoirs totaled 227% of normal as of the ! , - - <br /> end of February. E D : ut 1 1.i T 5 ti ` r <br /> V li <br /> NA� I <br /> Outlook ,. ti •-, : <br /> Despite dry conditions existing in the lower Arkansas <br /> basin, the water supply outlook appears good. Snowpack -3- <br /> around the headwaters of the mainstem is approximately <br /> JAN87 JAN88 JAN89 JAN90 JAN91 JAN92 JAN93 JAN99 JAN95 JAN96 <br /> 150% of normal and reportedly well packed down. Basin NDNTWYEAa <br /> reservoirs also remain at near full levels. <br /> Administrative/Management Concerns <br /> Hearings in the Division 2 Water Court on the 1996 <br /> Well Use Rules have been postponed from March until April. ARKANSAS RIVER NR. PORTLAND <br /> This delay may affect deadlines for submission of replacement ,SO - FLOW BY WATER YEAR <br /> plans under the rules and the overall administration of well 140 <br /> - <br /> augmentation for the upcoming irrigation season. 1 <br /> 32 <br /> 120 <br /> s „D <br /> Public Use Impacts ,42 <br /> 100 <br /> Twin Lakes and Turquoise Reservoirs,located near the 3 90 ' <br /> so <br /> headwaters of the Arkansas River, have remained full this g <br /> winter. Normally both these reservoirs are drawn down s- 70 <br /> ry <br /> during the winter by releasing water to Pueblo Reservoir in I 50 <br /> 50 <br /> order to make them ready to store transbasin water during the 40 <br /> runoff. With Pueblo Reservoir remaining full from last 30 <br /> summer, no releases have been made this winter and the 20 ' <br /> Oct Nov Dec Jon Feb March <br /> upper Arkansas has been flowing at a lower rate than it MONTH <br /> otherwise would. WET(1984) o Dar(19277 6 AVG 9 1995 <br /> Representative Reservoirs <br /> 320 Arleen..River ea BIn <br /> 28 <br /> 260- <br /> 2fi0- \ \ <br /> .42 - <br /> F 22 - <br /> ° z00 D- <br /> a \ \ <br /> ,50- <br /> • / <br /> g 12 0- / <br /> 100- <br /> q / \ <br /> 80 6D\ \ \\ \ <br /> 20 \ \ <br /> 0 \ //\ \ \7\ <br /> John l rt l n Pueblo Tirauoi ca Twl n La.. <br /> ® Avg. 2/28 Content. ® 2/29l98 cont.nta <br /> 4 <br />