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<br />RIO GRANDE COMPACT COMMISSION REPORT
<br />
<br />Rio Grande below Elephant Butte Dam, N. Mex.
<br />
<br />Locatlon.-Water-stage recorder, Iat33'08'54", long 107'12'22", in SWI/4 sec. 25, T.13 S., R. 4 W., (projected) in Pedro Armendariz
<br />Grant, 1.0 mile downstream from dam and 1.5 miles upstream from Cuchillo Negro River. Datum of gage is 4,242.09 ft above mean
<br />sea level, datum of 1929. Prior to April 23, 1942, at several different sites and datums.
<br />Drainaze area.-29,450 sq mI, approximately (Includes 2,940 sq ml in closed ba.in In San Luis Valley, Colo.).
<br />Averaze discharze.-77 years (1915-91),995 It'/s (720,900 acre-ft per year).
<br />Extremes.-1915-91: Maximum daily discharge, 8,220 It'/s May 22,1942; no flow at times prior to 1929 and March 2-4,1979.
<br />Remarks.-Records good. Flow regulated by Elephant Butte Reservoir. Diversions for irrigation of about BOO,OOO acres above station.
<br />
<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Second- Maximum MInimum Runoff In
<br />Month foot-days daily dally Mean acre-feet
<br />January 365.3 14 9.2 11.8 725
<br />February 12,537.8 1,300 8.6 448 24,870
<br />March 41,331 1,510 665 1,333 81,980
<br />April 41,768 1,560 948 1,392 82,850
<br />May 47.020 2,040 919 1,517 93,260
<br />June 57,710 2,130 1,400 1,924 114,500
<br />July 44,9GG 2,000 683 1,451 89,230
<br />August 19,589 1,490 23 632 38,850
<br />September 22,691 1,570 13 756 45,Q10
<br />October 13,361.0 1,280 6.0 431 26,500
<br />November 210.4 71 6.8 7.01 417
<br />December 228.2 7.7 65 7.36 453
<br />Calendar year 1991 301,799.7 2,130 6.0 827 598,600
<br /> Rio Grande below Caballo Dam, N. Mex.
<br />
<br />Locatlon.-Water-stage recorder,lat32'53'OS",long 107'17'31', InNEI/4SWI 14 sec. 30, T.16 S., R. 4 W.,2,000 ft upstream from Interstate
<br />HIghway 25,4.200 ftdownstream from Caballo Dam, 1.3 miles upstream from Percha diversion dam, and 3 miles northeast of Arrf!'j.
<br />Datum of gage is 4)40.90 ft above mean sea level, datum of 1929. October 13,1938 to December 31, 1945, at datum 5.0 ft higher.
<br />Drainage area.-3O,700 sq mI, approximately (Includes 2,940 sq mlln closed basin In San Luis Valley, Colo.).
<br />Average discharge.-54 years (1938-91) 905 ft' Is (655,700 acre-ft per year).
<br />Extremes.-I938-91: Maximum dally discharge, 7,650 It'/s May 20,1942; minimum dally, 0.1 It'/s Oct. 31 to Nov. 14, 1954, Nov. 7 to
<br />Dec. 31,1955, Feb. 15-29, 1972.
<br />Remarks.-Records good. Flow regulated by Elephant Butte and Caballo ReservoIrs. Diversions for Irrigation of about 800.000 acres
<br />above station.
<br />
<br /> Monthly and yearly discharge, in cubic feet per second
<br /> Second- Maximum Minimum Runoff In
<br /> Month foot-days dally dally Mean acre-feet
<br /> January 35.0 2.0 1.0 1.13 69
<br /> February 6,616.0 848 2.0 236 13,120
<br /> March 53,237 2,190 777 1,717 105,600
<br /> Aprtl 36.059 1,440 929 1,202 71,520
<br /> May 44,400 1,890 I,QIO 1,432 GG.o70
<br /> June Sl,74O 2,250 1,620 1,925 114,500
<br /> July 47,530 2,140 1,300 1,533 94,280
<br /> August 33,692 2,000 100 1.087 66,830
<br /> September 25.043 1,900 25 835 49,670
<br /> October 11,135.0 926 3.0 359 22.D90
<br /> November 73.0 3.0 2.0 2.43 145
<br /> December 52.0 2.0 1.0 1.68 103
<br />~ Calendar year 1991 315,612.0 2,250 1.0 865 626.000
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