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<br />RIO GRANDE COMPACT COMMISSION R8PORT
<br />
<br />Reservoirs in Rio Grande Basin in New Mexico
<br />(project storage)
<br />
<br />81ephant Butte Reservoir.--Water-stage recorder in NW\ sec. 30, T. 13 S., R. 3 W., on Rio Grande.
<br />Storage began Jan. 6, 1915; capacity, 2,109,400 acre-ft at gage height 4,407.0 ft (crest of
<br />spillway), by survey of 1974. Datum of gage is 43.3 ft above mean sea level, datum of 1929.
<br />Water is used for power development and irrigation in New Mexico and Texas. Records furnished
<br />by Bureau of Reclamation. Delivery of transmountain water for minimum recreation pool was
<br />initiated in December 1975. Beginning Jan. 1, 1977 gage readings are midnight readings.
<br />
<br /> Month-end gage height, in feet, and contents, in acre-feet
<br />Date Gage he igh t Contents Change in contents TM water
<br />December 31, 1979 4,364.97 943,500 53,000
<br />January 31, 1980 4,364.58 935,800 -7,700 52,910
<br />February 29 4,364.40 932,300 -3,500 52,740
<br />March 31 4,3-66.25 969,100 +36,800 52,330
<br />April 30 4,364.68 937,800 -31,300 51,880
<br />May 31 4,373.28 1,118.700 +180,900 51,220
<br />June 30 4,379.92 1.277,400 +158,700 50,320
<br />July 31 4.378.58 1,244,000 -33.400 49,550
<br />August 31 4,375.25 1,164,000 -80,000 49,020
<br />September 30 4,375.68 1,174,100 +10,100 48,740
<br />October 31 4.375.00 1,158,200 -15,900 48.360
<br />November 30 4,377 .09 1,207,600 +49,400 48,180
<br />December 31 4,377.69 1,222,200 +14.600 48,040
<br />Calendar year 1980 +278,700
<br />
<br />Caballo Reservoir.--Water-stage recorder in SE\SW\ sec. 19, T. 16 S., R. 4 W., on Rio Grande. Storage
<br />began Feb. 8. 1938; capacity. 344,000 acre-ft (by 1958 survey), at gage height 4,182.0 ft (above whic
<br />spillway gates open automatically). Datum of gage is 43.3 ft above mean sea level, datum of 1929.
<br />100,000 acre-ft of storage reserved for flood control. Records furnished by Bureau of Reclamation.
<br />Beginning Jan. 1, 1977. gage readings are midnight readings.
<br />
<br />Month-end gage height, in feet, and contents, in acre-feet
<br />
<br />Date
<br />
<br />Gage height
<br />4,148.49
<br />4,156.22
<br />4,160.89
<br />4,145.53
<br />4,152.27
<br />4,156.27
<br />4,152.80
<br />4,142.46
<br />4,140.14
<br />4,131.20
<br />4,132.58
<br />4,134.44
<br />4.150.48
<br />
<br />Contents
<br />
<br />Change in contents
<br />
<br />73,560
<br />115,900
<br />148,100
<br />60,560
<br />92,510
<br />116,200
<br />95,410
<br />48,690
<br />40,770
<br />17,160
<br />20.200
<br />24,620
<br />83,170
<br />
<br />December 31, 1979
<br />January 31, 1980
<br />February 29
<br />March 31
<br />Apri 1 30
<br />May 31
<br />June 30
<br />July 31
<br />Augus t 31
<br />September 30
<br />Octobe r 31
<br />November 30
<br />December 31
<br />
<br />+42.340
<br />+32.200
<br />-87,540
<br />+31,950
<br />+23,690
<br />-20,790
<br />-46.720
<br />-7,920
<br />-23,610
<br />+3,040
<br />+4,420
<br />+58,550
<br />
<br />Calendar year 1980
<br />
<br />+9,610
<br />
<br />pro;ect Storaqe.--This is the combined usable storage in Elephant Butte and Cabal10 Reservoirs.
<br />Total ProJect storage capacity is 2.353,400 acre-ft which excludes the 100.000 acre-ft reserved
<br />for flood control in Cabal10 Reservoir.
<br />
<br />Month-end contents, in acre-feet
<br />
<br />Date
<br />
<br />Contents
<br />
<br />Change in contents
<br />
<br />December 31. 1979
<br />January 31, 1980
<br />February 29
<br />March 31
<br />April 30
<br />May 31
<br />June 30
<br />July 31
<br />August 31
<br />September 30
<br />October 31
<br />November 30
<br />December 31
<br />
<br />964,100
<br />998,800
<br />1,027,600
<br />977,400
<br />978,400
<br />1,183,700
<br />1,322,500
<br />1,243,100
<br />1,155.800
<br />1,142,500
<br />1,130,000
<br />1,184.100
<br />1.257,300
<br />
<br />+34,700
<br />+28,800
<br />-50,200
<br />+1,000
<br />+205,300
<br />+138,800
<br />-79,400
<br />-87,300
<br />-13,300
<br />-12.500
<br />+54,100
<br />+73,200
<br />
<br />Calendar year 1980
<br />
<br />+293,200
<br />
<br />NOTE.--Va1ues of combined contents may not agree with sum of individual values because of rounding.
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