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ARKANSAS BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of +0.5 indicates that the current SURFACE WATER SUPPLY INDEX <br /> conditions are near normal. Precipitation for the month of Niceness <br /> p' r ei1n August, however, was only 75% of normal. Precipitation 4_ <br /> contrasts were dramatic with La Junta recording 0.10 inches ; w 1. ,, ! <br /> of rain and Trinidad 5.48 inches of rain. Cumulative flow at 3- ?- . <br /> the key index gaging station, Arkansas River near Portland, 2- = w : <br /> L _ . <br /> remains 35% below average for the water year. This is = <br /> above the record low flow recorded in 1977, but only due 0 - -- <br /> to reservoir releases from Twin Lakes Reservoir. Usable <br /> storage in Pueblo Reservoir was approximately 75,000 acre • <br /> - <br /> feet on September 1, 1990. About 75% of this is project o -2- - - - <br /> water. -3- <br /> Outlook: .rw li 1 JAMf2 JA3 JAN1 NJll 4 JANIS JANOS JANE? J JAHN JAN10 .W1 A <br /> KINTW YEAR <br /> Although the Palmer Drought Index was positive <br /> throughout the basin for the month of August, hot and dry - <br /> conditions in September are expected to bring soil moisture <br /> levels back to normal or even below normal. Late season <br /> reservoir runs are expected to further deplete storage levels <br /> in Pueblo Reservoir and John Martin Reservoir. ARKAN5A5 RIVER NR. PORTLAND <br /> 1 H.O.Br UM►'F' <br /> Administrative/Management Concerns: 0.9 <br /> Numerous short reservoir releases have made <br /> reservoir accounting difficult. The water user community <br /> 0.7 <br /> must keep in close communication with their respective + <br /> 0.4 <br /> water commissioner to provide for more effective 1 <br /> administration of these releases. There will be considerable 0's <br /> OA <br /> emphasis on management of the Winter Water Storage <br /> Program running November 15, 1990, to March 15, 1991, 0.3 <br /> due to short supplies. 0.2 <br /> 0.1 - <br /> Public Use Impacts: 0 _ - <br /> Oct Nov Ose Jsn Feb %arch Iprl i Juno July Aug Sspt <br /> Water based recreation has been significantlyICHTl, <br /> impacted at Pueblo Reservoir, John Martin Reservoir and HIGH(1984) * LON(1177) o AVG • 1990 <br /> Trinidad Reservoir due to falling storage levels. The Bureau <br /> of Reclamation discontinued the transfer of Twin Lakes <br /> Reservoir storage to Pueblo Reservoir on August 15, 1990, <br /> thus reducing the flow at the Arkansas River near <br /> Wellesville to 300 cfs. Arkansas Basin Reservo i r Supplies <br /> 110 <br /> 100_ <br /> 90- f/1� <br /> 90 <br /> 1 70 <br /> k <br /> I ///-\\ <br /> „-\ ,„. //\ <br /> John martin NINOlO Tlrquolf1 To LOtM <br /> ® Ang.9131 Contents ® S/31/90 Gontsnte <br /> 4 <br />