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<br />RIO GRANDE COMPACT COMMISSION REPORT
<br />
<br />Reservoirs in Rio Grande Basin in New Mexico
<br />(Project storage)
<br />
<br />Elephant Butte Reservolr.--Water-stage recorder in NW~ sec. 30, T. 13 S., R. 3 W., on Rio Grande.
<br />Storage began Jan. 6, 1915; capacity, 2,110,300 acre-ft at gage height 4,407.0 ft (crest of
<br />spillway), by survey of 1980. 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 height Contents Change in contents Tr1 water
<br />December 31, 1986 4,406.45 2,090,100 0
<br />January 31, 1987 4,405.24 2,045,900 -44,200 0
<br />February 28 4,406.24 2,082,400 +36,500 0
<br />March 31 4,406.37 2,087,100 +4,700 0
<br />April 30 4,405.71 2,063,000 -24,100 0
<br />May 31 4,405.88 2,069,200 +6 ,200 0
<br />June )0 4,405.41 2,052,100 -17,100 0
<br />July 31 4,405.78 2,065,600 +13,500 0
<br />August 31 4,404.46 2,017,800 -47,800 0
<br />September 30 4,402.87 1,961,000 -56,800 0
<br />October 31 4,402.77 1,957,500 -3,500 0
<br />November 30 4,403.83 1,995,200 +37,700 0
<br />December 31 4,405.17 2,043,400 +48,200 0
<br />Calendar year 1987 -46,700
<br />
<br />Caballo Reservoir.--Water-stage recorder in SE\SW\ sec. 19, T. 16 s., R. 4 W., on Rio Grande.
<br />Storage began Feb. 8, 1938; capacity, 331,500 acre-ft (by 1981 resurvey), at gage height
<br />4,182.0 ft (above which spillway gates open automatically). Datum of gage is 43.3 ft
<br />above mean sea level, datum of 1929. 100,000 acre-ft of storage reserved for flood control.
<br />Records furnished by Bureau of Reclamation. Beginning Jan. 1, 1977, gage readings are
<br />midnight readings.
<br />
<br />Month-end gage height, in feet, and contents, in acre-feet
<br />
<br />Date
<br />
<br />Gage height
<br />
<br />4,173.55
<br />4,174.22
<br />4,174.83
<br />4,172.80
<br />4,172.32
<br />4,172.62
<br />4,174.01
<br />4,172.69
<br />4,173.91
<br />4,172.57
<br />4,170.17
<br />4,170.01
<br />4,170.67
<br />
<br />December 31, 1986
<br />January 31, 1987
<br />February 28
<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 />Calendar year 1987
<br />
<br />Contents
<br />
<br />242,000
<br />248,500
<br />254,500
<br />234,800
<br />230,300
<br />233,200
<br />246,400
<br />233,800
<br />245,500
<br />232,700
<br />210,900
<br />209,400
<br />215,300
<br />
<br />Change in contents
<br />
<br />+6,500
<br />+6,000
<br />-19,700
<br />-4,500
<br />+2,900
<br />+13,200
<br />-12,600
<br />+11,700
<br />-12,800
<br />-21,800
<br />-1,500
<br />+5,900
<br />
<br />-26,700
<br />
<br />proiect Storage.--The combined usable storage in Elephant Butte and Cabal10 Reservoirs.
<br />Total project storage capacity is 2,341,800 acre-ft.
<br />
<br />Month-end contents, in acre-feet
<br />
<br />Date
<br />
<br />December 31, 1986
<br />January 31, 1987
<br />February 28
<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 />Calendar year 1987
<br />
<br />Contents
<br />
<br />Change in contents
<br />
<br />2,332,100
<br />2,294,400
<br />2,336,900
<br />2,321,900
<br />2,293,300
<br />2,302,400
<br />2,290,500
<br />2,299,400
<br />2,263,300
<br />2,193,700
<br />2,168,400
<br />2,204,600
<br />2,258,700
<br />
<br />-37,700
<br />+42,500
<br />-15,000
<br />-28,600
<br />+9,100
<br />-3,900
<br />+900
<br />-36,100
<br />-69,600
<br />-25,300
<br />+36,200
<br />+54,100
<br />
<br />NOTE.--Va1ues of combined contents may not agree with sum of individual values because of rounding.
<br />
<br />-73,400.
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