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1 <br /> SAN JUAN/DOLORES BASIN y July, 1998 <br /> I. <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.7 indicates that for June the SAN JUAN/DOLORES RIVER BASINS <br /> basin water supplies were near normal. Flow at the gaging S surface.rter S"°°'y Index MotorY <br /> station Animas River near Durango.averaged 2,020 cfs as 4_ <br /> compared to the long term average of 2,556 cfs. Storage in '- <br /> m 3- + ;, �I <br /> McPhee, Vallecito, and Lemon reservoirs totaled 112% of ;. - a <br /> normal as of the end of June. - 7 :f <br /> Southwestern Colorado experienced a dry June. 1 ;; 3 = <br /> While typical of this time of year, the area was especially dry 1 ° IL—,. ;' 4- FJL n <br /> ftj <br /> this month. Durango received only 0.07 inches of -1_ 'pl v <br /> • <br /> precipitation in June that left the last 3 months precipitation _ _ "�''' <br /> total at 20%of normal, and the water year at 73% of normal 2 - , ' { o <br /> so far. -°- - <br /> Rivers peaked early in June. On June 3 the Animas pi-4 JAN60........J....AN0O.......JA....N94.......J..AN.. .92....JAN03.........JAN54....._._.JAN9.....0..----JAN---6---..J..Al98.. -------J-APi---6--.---- <br /> peaked at 4,050 cfs and the Dolores at 2,295 cfs. A cool spell 1,04W YEAR <br /> ensued with temperatures dropping to near freezing levels in <br /> the early morning, highs in Durango not over 82°, and the <br /> high elevation snowpack freezing up. By the last week of the <br /> month, the highs were again in the 90's, and the snowpack <br /> again produced runoff. Major rivers then ran at 70% of ANIMAS RIVER NR. DURANGO <br /> normal flows. The overall result was that steady high flows i �oM /A76!YEAR <br /> were seen throughout the month which is an unusual a,B . _ <br /> circumstance for June. Entering July afternoon rain showers a.a . <br /> were beginning to bring relief to the high temperatures. <br /> Outlook <br /> It is anticipated that reservoir supplies would be LL- <br /> drawn down significantly if weather and soil moisture s V <br /> conditions remain the same. 1 0.3 <br /> 0.2 fe <br /> Public Use Impacts °.1 <br /> Early growth and dry weather led to early cuttings of <br /> Oct Nov Csc Jan Feb ►brah Aor II May June July Aug Sept <br /> hay in the irrigated areas. Alfalfa growth was poor,but grass ....T.grew better in the cooler weather. Production of hay was ..L.,`'°'� °`""°"' A"0 >< "°° <br /> lower than in previous years,but prospects for a good second <br /> cutting are a possibility if summer rains continue. <br /> The rafting season seemed to be prolonged by the <br /> lengthy river run. REPRESENTATIVE RESERVOIRS <br /> 00LOFES-ANIM*S RIVER BASINS <br /> 400 <br /> 350 <br /> M 300 7 <br /> s <br /> xsg <br /> ../\ <br /> I i as.Z\ <br /> b8 <br /> " tso <br /> i <br /> 3 100 r <br /> so <br /> o // \ A\ v/// L,_\ <br /> McPhee Val leclto Lengn <br /> ZZ Avg.15,30 Contents ® 6/30/SE Contents <br /> 9 , , t <br />