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ARKANSAS BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of +0.1 indicates that the overall SURFACE WATER SUPPLY INDEX <br /> in <br /> conditions are normal. Precipitation for the month was 203% 5 - "rkarasa River B. <br /> of average and 118% for the water year. Flow at the key ,_ <br /> index gaging station, Arkansas River near Portland, averaged _ Y �, ,1 <br /> 844 cfs for the month as compared to the historic monthly 3 - �._ ry <br /> • <br /> flow of 1720 cfs. Cumulative flow for the water year at this 2-, «: _ <br /> station is approximately 30% below average. Reservoir 1- ; -'� - <br /> storage measured on August 1, 1991, was 93% of average. g o i...• 1 I- .I �. <br /> Storage (usable) in the upper reaches of the basin in -,- i <br /> Turquoise Reservoir and Twin Lakes Reservoir amounted to <br /> 6 -2- <br /> 166,971 acre-feet. Pueblo Reservoir had 87,000 acre-feet in <br /> storage on August 1 compared to 112,000 acre-feet one year -3- <br /> ago. This years value is approximately 45%of average for the -4 I <br /> JANB2 JAN83 JAN84 JAN85 JAN86 JAN87 JANBB JAN89 JAN90 JAN91 <br /> date. MONTH/YEAR <br /> Outlook: <br /> The streamflow forecast is low outside of the Arkansas <br /> mainstem. Reservoir releases for irrigation will remain high <br /> into the late summer to supplement low flows. The Bureau of ARKANSAS RIVER NR. PORTLAND <br /> Reclamation began transferring project water from the upper FLOW BY WATER YEAR <br /> basin reservoirs sufficient to maintain a 700 cfs flow in the 0.9 - <br /> Arkansas River above Pueblo Reservoir to enhance recreational 0.8 <br /> uses. Releases may total up to 10,000 acre-feet. Trout0.7 <br /> Unlimited is seeking a court order to halt the releases 0.8 <br /> suggesting that increased (and unnatural) flows will o 0.5 <br /> negatively impact the fishery. D 4 <br /> Administrative/Management Concerns: I0.3 <br /> The Kansas vs. Colorado trial regarding the Arkansas 0.2 <br /> River interstate water compact is in recess until February, <br /> 1992. Transmountain diversions within the Fryingpan- 0 <br /> Oct Nov OWE Jan Feb May June July ALO Sept <br /> Arkansas Project totaled 58,900 acre-feet on August 1, 1991. MONTH <br /> 0 WET(1984) + DRY(1977) O AVG A 1981 <br /> Operations call for a total diversion this water year of 60,000 <br /> acre-feet. <br /> Public Use Impacts: <br /> Water based recreation at Pueblo Reservoir and on the Arkansas Basin Reservoir Supplies <br /> Arkansas River above Pueblo Reservoir will be maintained. 130 <br /> John Martin Reservoir,however,was storing less than 12,000 120- <br /> acre-feet of water on August 1, 1991 but will probably - <br /> 100- <br /> stabilize at 9000 acre-feet. It is currentlystoringat only15% <br /> of normal. It is at the lowest level since 1982. Water based BO_ <br /> a <br /> recreation remains high at Twin Lakes and Turquoise ,i 701 <br /> Reservoir. 2 80 <br /> i 40 <br /> 30 <br /> 20 <br /> JON.Martin Pue010 Turqu0les Twin Lakes <br /> ® Avp, 7/31 Content. ® 7/31/90 Contents <br /> 4 <br />