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-r, <br /> RIO GRANDE BASIN <br /> Basinwide Conditions Assessment: <br /> The SWSI value of -0.1 indicates that the current SURFACE WATER SUPPLY INDEX <br /> conditions are normal. Precipitation measured 108% of s Grande""`" <br /> average for the month and is 124% of average for the water 4- <br /> year. Flow at the key index gaging station, Rio Grande near - _ <br /> Del Norte, averaged 520 cfs for the month as compared to the _; .jc <br /> historic monthly average of 7.5 cfs. Cumulative flow at this - r = _i 1,:j JL • <br /> station for the water year is near normal. Basin wide reservoir 1 i- :2; ; „- 7 <br /> storage was at 93%of average on September 1, 1991. Platoro i ° I- .� """ -- ' _n ' 1-,, <br /> Reservoir decreased storage (usable) to 22,500 acre-feet on - _,- ; It^ i ' <br /> September 1st. The month of August brought near normal Y _ - ' ` <br /> runoff in the Rio Grande Basin for most streams. Intense o -� <br /> storm activity provided for higher than normal flow on some "'- f <br /> of the smaller streams around the rm of the San Luis Valley -i , <br /> JAN82 JANS3 JANS4 JAMS JAME JANB7 JAN96 JANIS JAWYO JAN21 <br /> but helped in providing water supply to several; junior YEAN/tONTN <br /> ditches. With the exceptions of Platoro,Mt.Home,and Smith <br /> Reservoirs most of the major reservoirs were drawn down to <br /> carry-over levels and will not provide reservoir water <br /> throughout the rest of this year. Harvest is in full swing and <br /> the demand for water is thereby reduced but only the most RIO GRANDE NR. DELNORTE <br /> senior ditches continue to have a water supply. 1.1 FLOW■r SATES YEAR <br /> 1 <br /> Outlook: 0.1 <br /> The outlook for September appears to be near normal 1 <br /> unless substantial rainfall occurs. The last of the reservoir 4 G. O.7 <br /> releases should be made during September from reservoirs s! f' <br /> which still have water available. The natural flow on LL <br /> September 3rd was 340 cfs at the Rio Grande near Del Norte li 0.4 <br /> gage and 130 cfs at the Mogote gage. These flows are normal 1 0.3 - <br /> for this period. The "monsoon" is still providing moisture in 0.2 <br /> the southwest and if it continues there is still a possibility of n.i <br /> significant fall moisture occurring over the Rio Grande Basin. ° <br /> Oct N.v O.c Jan Feb OAarch April Nay Jun. July Au. Soot <br /> AONTM <br /> Administrative/Management Concerns: CI ET(1647) 4, DAY(187Tj o AVG a 1191 <br /> The administration of the Rio Grande Compact went <br /> well during the month of August and because of the <br /> continuing decline in flows it appears that our Compact <br /> obligation will be met. The Curtailment to the diversions on Rio Grande Basin Reservoir Supplies <br /> the Conejos and Rio Grande have been reduced during August <br /> because anticipated higher flows have not occurred. If the 22- <br /> flows in the Conejos and Rio Grande continue to decline it is 2°- "j <br /> possible that Compact curtailments may be reduced even "s i°- <br /> • further providing more water to users throughout the fall : '°- <br /> g„ <br /> months. d 14- <br /> oi t 1D <br /> Preparations for the AWDI trial, 86CW46, continues in both a a <br /> the Division and State Engineer's offices. Deposition of 3 , <br /> experts was concluded as of the end of August and production 4 <br /> xP S'u <br /> of documents is due in early September for both sides in the 2 ii <br /> ��\y A _ „ . <br /> . <br /> case. A pretrial conference has been set for September <br /> Rio Grand. Platoro S.nt.Nr I <br /> 26,1991 and the trial is set to begin October 15, 1991 in the <br /> Division III Water Court, Alamosa, Colorado. ® M71 Contents ® v3vs°Contents <br /> 5 <br />