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<br />STREAM FLOW
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<br />Rio Grande below Elephant Butte Dam, N. Mex.
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<br />Location,--Water_stage recorder, lat 33008'45", long 107' 12'20", in swi sec,25, T,I3 S., R.4 W" (prOjected)
<br />in Pedro Armendariz Grant, on left bank 1,0 mile downstream from dam and It miles upstream from Cuchfilo
<br />Negro River, Datum of gage is 4,242,09 ft above mean Sea level, datum of 1929. Prior to Apr, 23. 1942, at
<br />several different sites and datums,
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<br />Drainage area,--28,900 sq mi, approximately (includes 2,940 sq mi in closed basin in San Luis Valley, COIo,),
<br />Average discharge.-_52 years (1915-66), 1,030 cis (745,700 acre-ft per year),
<br />Extremes.--1915-66; Maximum daily discllarge, 8,200 cis May 22, 1942; no flow at times Prior to 1929,
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<br />Remarks,--Records good, Flow regulated by Elephant Butte Reservoir, Diversions for irrfgation of about 800,000
<br />acres above station.
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<br /> Monthlv and vearlv dlschaNe in cubic feet per second
<br /> Month Second_ Maximum Minimum Mean Runoff in
<br /> foot-days daily dally Acre-feet
<br />January . , , , , . , , , , . . . . , , . . . . , . . 360,4 42 5, I 11,6 715
<br />February . . , , . . . . , . . , , . . . . . . . . , 44,800 1,620 1,470 1,600 88,860
<br />March ...,............,...". . 57, 620 1,880 1,610 1,859 114, 300
<br />April "',.........,..,.....,.. 54, 990 1,900 1,440 1,833 109. 100
<br />May ,.,.,...,.,..,.",........ 58,180 1,920 1,800 1,877 115, 400
<br />June , . . . . . . , . . . , . . , . . . , . , . , , . , 47,280 1,860 1,240 1,576 93,780
<br />July ,....,..,.....,.........., 39,310 1,800 1,230 1,268 77,970
<br />August ,......,..."""....,.. 28, 312 1,270 182 913 56,160
<br />September ..,...,.,..,."..., 1,738.6 510 1.4 58,0 3,450
<br />October ,."...........,..,..,. 133.4 15 2.2 4, 30 265
<br />November . . . . . . . . . , . , , , . . , . , . . 149,3 8,6 3,0 4.98 296
<br />December ....,.."..",....", 178.2 8,5 4,2 5.75 353
<br />Calendar year 1966 . , . , , . . . , . . . 333, 051. 9 1,920 1.4 912 660, 600
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<br />Rio Grande below Caballo Dam, N. Mex.
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<br />Location,--Water_stage recorder, !at 32'53'05", long 107' 17"30", in NEtSWt Sec, 30, T,16 S., R.4 W" 600 it up-
<br />stream from Bojarquez Bridge, 4,200 ft cbwnstream from Caballo Dam, 1 1/3 miles upstream from Perclla
<br />diversion dam, and 3 miles northeast of Arrey, Datum of gage is 4,140,9 it above mean sea level, datum of
<br />1929. Oct. 13, 1938, to Dec, 31, 1945 at datum 5.0 ft higher,
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<br />Drainage area,--30,200 sq mi, approximately (includes 2,940 sq mi in closed baSin in San Luis Valley, Colo,),
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<br />Average discharge,--29 years (1938-66) 902 cis (653,000 acre-it per year).
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<br />Extremes.--1938_66; Maximum daily discllarge, 7,650 cfs May 20, 1942; minimum dally, 0,1 cfs Oct, 31 to Nov. 14,
<br />1954, Nov, 7 to Dec, 31, 1955,
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<br />Remarks,--Recorda good, Considerable diversion aboVe station for irrigation, Flow regulated by Caballo and
<br />Elephant Butte ReserVOirs.
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<br /> Monthlv and vearlv diSCharge, in cubic feet per second
<br /> Month Second_ Maximum Minimum Mean Runoff in
<br /> foot- dav s daily daily Acre-feet
<br />January . . . , . . . , . . . . . , . . . . . . . , . 26,8 1.0 0.7 0,9 53
<br />February ....,.........,..,.... 26,3 1.0 ,9 .9 52
<br />March . . , . . , . . , . . . . . " ........ 60,725 3t 410 1.0 1,959 120,400
<br />April ....,......,......""., , 39, 686 2,990 716 1,323 78, 720
<br />May ,.............,...,..,... , 35, 566 1,380 728 1,147 70,540
<br />June ',...,...,....,........... 48,903 2,280 177 1,630 97, 000
<br />July ,........,..........".", 59,838 2,780 713 1,930 118, 700
<br />August , , , . , . , . . , , , , . . , . . . . . . . . 45,374 2,250 880 1,464 90, 000
<br />'September ',.........,....... 17,433,8 1,280 1,4 581 34, 580
<br />October ....,.'...........,.." 39,0 1.5 1.1 1,3 77
<br />November , , , . . , , , . , , , . , . . . . . , . 52.9 2,5 1.1 1.8 105
<br />December ..,,,....,..,.,,,.,.. 37,2 1.2 1.2 1.2 74
<br />Calendar year 1966 . . , , , . , , . . . , 307,708,0 3,410 ,7 843 610, 300
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