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1 <br /> RIO GRANDE BASIN February, 1999 <br /> Basinwide Conditions Assessment: <br /> The SWSI value of 0.9 indicates that for January the R I 0 GRANDE BAS 1 N <br /> basin water supplies were near normal. The Natural 5 Surface ELKS ly Inds"leta.y <br /> Resources Conservation Service reports that February 1 4 <br /> snowpack is 89% of normal. Flow at the gaging station Rio - 11 I 1 i, <br /> Grande near Del Norte averaged 216 cfs, as compared to the 11FF 1 1, jF i1i I i <br /> longterm averse of 168 cfs. The Conejos River near Mogote 11(1 1 111 IIII'1' <br /> g g 2 I 1111 I. . I III 1111111 I <br /> '� 10 �1111111 II I 1 III II(IIII I <br /> had a mean flow of 45 cfs (93% of normal). Storage in 1 1 , II 1 mural II III uun11 1 i I <br /> II II I IIIIIN III II Rli 1111111 L IF <br /> o 1 III. ill I. IIIIIIY III , I 111 mil III II 1 <br /> Platoro,Rio Grande,and Santa Maria reservoirs totaled 118/o 0 'l 1 1 I „1 ,I I , Ili 1i 11 <br /> !I 1 I, II <br /> of normal as of the end of January. 1 , 1' 1 1, 1 I ;;l 1' <br /> Precipitation in Alamosa was 0.07 inches, 0.19 inches . ' I, I ii' <br /> Q -2 II <br /> below normal. Temperatures ranged from -4° to 56° in G I <br /> Alamosa where the average monthly temperature was•25.6°, 3 <br /> 10.9° above normal. -4 <br /> JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN99 JAN97 JAN98 JAN99 <br /> Residents of the San Luis Valley are enjoying the YEAFv.... N <br /> "balmy" weather conditions. Alamosa even had the high <br /> temperature in the state for a couple of days during the past <br /> month; which was the warmest January in the past 30 years. <br /> Outlook R I 0 GRANDE BAS I N <br /> With the highest basin snowpack in the state, local 5 , Surface Meter 9�o1y Index!Notary <br /> water administrators ought to be pleased. However,forecasts 4_ <br /> are predicting area stream flows in 1999 to be in the range of - , <br /> w 3- <br /> 80%to 90% of normal. _ y <br /> -T-2- 1 .� <br /> Administrative/Management Concerns 1 I-1 - - at01 — -' <br /> • <br /> End of the year analysis of stream flow in the upper g a ,II 1 .' ' , ,, I l! `�, 1 I II <br /> Rio Grande basin revealed the Rio Grande near Del Norte - -, <br /> carried 88% of the normal annual volume <br /> during 1998, and - 2 kl% 1 <br /> the Conejos River near Mogote carried 80% of normal. <br /> The total Closed Basin Project production during 1998 -3 <br /> was 34,310 acre-feet, of which 29,980 acre-feet were <br /> JAN90 JAN91 JAN92 JAN93 JAN94 JAN95 JAN99 JAN97 JAN99 JAN99 <br /> creditable delivery to the state line. This creditable delivery YEA9/61314TN <br /> helps the two river systems meet Colorado's delivery obligation <br /> to New Mexico and Texas. <br /> Public Use Impacts <br /> Outdoor activities dependent on snow depth are REPERSENTAT I VE RESERVOIRS <br /> suffering from the below average conditions. 2. RI8 GRANDE BASIN <br /> 20- <br /> 19- <br /> e 14 1J//// <br /> ,▪12 zA <br /> trio <br /> a 8 y/\ <br /> j <br /> 6 /\ /\ <br /> Rio Grande PI.t.oro Sant'Mar 1a <br /> ® Av. 1/31 Contents ® 1/31/99 contents <br /> 5 <br />