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<br />RIO GRAlIDE COllPACT COWJISSION
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<br />
<br />RIO GRJJfDE AT SAN MARCIAL. NEW ~XICO
<br />
<br />mSORIPTIOlh Water_stags reoorder and cable with dt-down cable oar and winch looated at railroad. bridge about one mile be-
<br />law San Marcial, New Mexioo, and 171.1 miles above the American Dem at El Paso, Texas. The recorder is on the upstream
<br />end of the first bridge pier frOlll the south abutment of the bridge and the zero ot ita gage is 4,455.38 feet, United.
<br />states ColUt IID.d Geodetio Survey sea lovel dllt\m. On February 17. 1943 while the dook of the railroad bridge was beillg
<br />raised about 12 rest.. the reoorder was moved to ths downstream side of the Val Verde highway bridge 1.6 mUes upstreMl.
<br />from the railroad bridgs. Elevation of zero of the gage at the highway bridge was not determined. The reoorder was re_
<br />turned to the original locatl?n on the railroad bridge OIl June 25, 1943.
<br />
<br />RECORDS I Bued upon 125 meter meaeuremente by wading and frOI;l. (Jab1e about 1.000 fee-t above railroad bridge. Computatione
<br />by ehitting ahannltl methods. 1943 records good. Records e:n.llablel January 1895 to Deoember 1943.
<br />
<br />REJlARKS, For gage history 1895 to 1938 eee International Bowdary COlllll1iulon W'a-ter Bulletins ~os. 4. 7 and S. El Vado and
<br />smaller reservoire and many irrigation diversions and drainage returns above this etation in Colorado and New Mexioo
<br />modify the river flow.
<br />
<br />COlIPARATIVE FU>WS moo RECORDS: Yoment~ Pesl" Max.. Oot. 11. 1904. 60.000 seo. ft. with _ter surface level of 4.459.5
<br />ft. on U.S.C. & 0.5. datum about .25 mile above the present <<tation gage. This is the greatest flood peak flow in at
<br />leut the put 115 years or since 1828. uin., sometws dry. See International Bowdary Commission Water Bulletin No.
<br />6. page 79. for large peak flows' sinoe 1828 and their average frequency. Daily: ~ax.. Oct. 11, 1904; 33.000 5ec. ft.
<br />average. Min., IOIlletimes dry. :nt~r Max., Yay 1941. 16.159 sec. ft. average. Min., sometimes dry. ~~ariY~ Max.,
<br />1941~ ~. 911 see. ft. average. M.. 02, 277 seo. f't. average. TWo Successive Yearsl llax., 1941 Md 19 , , 00 sec.
<br />ft. average. Min., 1899 and 1900. 487 8ee. ft. average. Three Su~saive Years: Max., 1905 to 1907. 2.830 sec. ft.
<br />average. Min.. 1900 to 1902, 609 eeo. ft. average. FOur Successive years: Max.. 1905 to 1908, 2.390 seo. ft. average.
<br />Kin.. 1899 to 1902, 539 sec. ft. average. Five Successive Years: .!.lax., 1905 to 1909, 2.260 .sec. ft. average. :din.,
<br />1898 to 1902. 697 sec. ft. average. 'I'8n SuOCii8ive YearB: 1903 to 1912. 1,980 aec. ft. average. Min., 1931 to 1940.
<br />1.140 Slet!. tt.. ..verage. Fbrty-nine Yiiii=' Averagel 1,560 sec. ft..
<br />
<br />Doy J~. Feb. )far. Apr. '.y J=. July A.ug. Sopt. Dot. Nov. Dec.
<br />1 ." 935 612 124 1,240 220 2,680 27.0 752 201 242 680
<br />2 819 858 656 154 1.200 192 1.920 31.3 669 505 265 608
<br />l .90 826 164 102 1.140 269 1,460 36.0 528 590 50. 530
<br />858 872 820 122 1,380 184 1.050 35.1 341 579 579 460
<br />5 874 86' 816 197 1,080 199 731 16.8 284 506 531 452
<br />6 845 910 819 192 1,050 231 590 58.8 211 294 279 461
<br />7 922 95' 841 550 1.200 241 314 492 147 552 288 514
<br />8 9" 845 804 609 1,(.50 275 296 754 117 298 289 659
<br />9 9" 545 142 828 1,360 640 510 509 98.2 284 330 750
<br />10 912 572 680 96. 1.870 567 302 44. Z05 271 347 966
<br />11 869 660 672 1,160 2.900 565 256 755 206 51' 315 928
<br />12 858 834 619 1,060 2.060 441 221 546 182 500 2'0 69t)
<br />13 .'7 "9 676 1,340 1.270 425 224 168 162 "6 258 8.4
<br />14 801 178 532 1,290 1.140 266 195 108 21. 552 210 805
<br />15 786 118 629 1,060 915 252 285 120 264 505 198 698
<br />16 161 661 748 776 709 m 240 121 201 256 166 652
<br />17 698 678 816 671 624 291 "6 141 165 254 172 656
<br />18 712 '156 1,040 655 458 144 150 162 184 200 240 718
<br />19 462 726 867 744 554 101 175 566 282 172 253 100
<br />20 502 712 722 968 209 142 17. 1,650 2" 167 202 667
<br />21 956 761 651 799 586 144 453 1.330 265 255 255 652
<br />22 1.nO 817 828 577 555 82.9 1,260 616 329 25. 255 669
<br />23 1.020 870 567 492 440 59.0 1.310 .,7 279 225 287 688
<br />24 913 869 666 691 490 206 931 516 240 266 527 715
<br />25 799 892 4., 780 305 93.2 ""' 384 209 306 365 798
<br />26 795 855 256 1.170 320 54.0 570 671 226 505 470 868
<br />27 860 842 189 1,890 387 45.6 505 313 262 271 .76 ...
<br />28 99. 701 16. 1.400 261 41.0 246 520 555 312 666 964
<br />~ 966 141 1.500 2.7 766 228 1,460 317 247 706 682
<br />951 ;~g 1.410 ~;~ 3.830 l~tR!L~~ 276 ~~~ 697 zr~
<br /> Ilonth Second~ Maximum Minimum ..~ Run.off in
<br /> foot.daYll acre-feet
<br />January.. ..... ............ ... ....... .............. ..... 26.593 1.110 462 858 52,700
<br />February. .. ... .. .... .... . '" .. .... . . ... ....... .. ... .. .. 22.071 939 643 788 43,800
<br />)larch.. ..... ..... ... ........ .............. ......... .... 18.642 1.040 129 601 37,000
<br />April. ........... ... ........ ..... ...................... 24,039 1.890 102 801 47.700
<br />Kay..... .... .... .......... ......... .... ........... ..... 27,376 2,900 178 885 54.300
<br />June. ... ..... ... ........ ..................... .......... 10,637.8 3,830 41.0 555 21,100
<br />July............. ... ..... ... ....... ....... ... ...... .... 18,063.8 2.680 56.8 583 35,800
<br />Augu.!t.. .............. ... .... ................... ... .... 14,569.6 1,650 16.8 470 28.900
<br />SeptODlber... ........................................ ~.. 8,215.2 752 98.2 27' 16.300
<br />O'.ltober.. ........ ... .... ........... ......... .-.. ........ 8.587 390 167 271 17.000
<br />November. ........ ... ...... ................ .... ...... ... 9,740 706 166 525 19,300
<br />Decembor.... .. ... ... ...... .. .. ... " . . . . .. ... ...... . . .. . 22 322 956 450 720 44,300
<br /> Year... ..... ............. ....... .... ......... 210.856. 3.630 16.6 578 416,200
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