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<br /> R!O GRANDE COMPACT COLlllISSION
<br /> RIO GRABDE 3ELOW CABALLO DAII
<br />Looation.- In the UEtswt Sea. 30, T. 16 S., R. 4 W" N.M.P.M.. ~pproxlmately 42aO teet below Caballo Dam in Sierra County,
<br />N. lIeX.J and abQut 20 miles 80uth of Hot Springs, N. Vex. and approximately 102 mUes northW\!lst of El Paso, Texas.
<br />Control.- No permanent control exists in the i~ediate vicinity of gage. A long range control 1s looated 7000 ft. below the
<br />gage. Thi, control 1a Peroha Dlvaraion D~. In the immediate vicinity ot the g~ge the Bojar-ques bridga, 600 ft. bel~ the
<br /> gaga, end an old semi-permanent delta of' Parcha Arroyo below the high.y bridge aota &s partial control. Iloving sand
<br /> cause. discharge-gage rel.tlon8~ip to be of a !hitting nature. Shlrtll.ho~Y$r.are moderate. SaneitlTlty 18 good.
<br />Discharge me.8urements.~ Discharge me~surements ~re made from a cable ~ith a sit.down oar equipped ~th reol. Measuring sec-
<br />~lon lS go~.~. ~s subjeot to oonsiderable soour during spill fro~ Caballo Dam April,May,June and July, 1942 during
<br />which period ma~tmum mean d~ily discharge was 7650 sec.tt. Infrequently during summer Dont~ in past years oheck measure-
<br />ments _re lI.ade fl'0IIl a cable looated about ~;4 mile below peroha ~1lIII and approximately 2 miles below the CabaUo sta.tion.
<br />To this .-. added a measurement of th~ flow of the Arrey Canal, the sum representing a check aD the Cabello station. As a
<br /> result or spill from Caballo DAm water began flewing around the ...st end of the Cabe.1lo oabla etation April 26,1942.
<br />Current RIter 1lll!Iuuremente were mAde on April 28 and April 29.1942 at thfl oable below Peroha Dam and on the Arrey ClU1al.
<br />A sudden ehan~ in thA river flow direotion washed out the oable below Percha DM! on May 1,]942. A new oa.ble dto was
<br /> looated and a meuurJng oable was installsd about 7 1!dles dOWllstre'lJl\ from the Caballo station. The first measurement at
<br />tbh. the Darry oable IltatioD, was made May lL, 19L,2. The seotion ....s re~lar, Approach at right angles. bottom sand, re-
<br /> sults very lati.faotory. MeasuremAnts were made at Derry until Yay 23.19 . The ht&hest discharge from Caballo during the
<br /> period was therAfore measured. Beginning May 24,1942 ~asurements were again possibl~ at the Caballo station. During this
<br /> entire period of high discharge from Caballo reservoir an auxilisry gage was maintained at percha Dam in order to check
<br />against the Cabal10 gage. The reoords durin& this flood period were oonsidered e~cellent a8 a result of the oheoks made.
<br />Consequentl)' all records during the period continue to be referred to th~ regular Caballo station gage.
<br />Regulation.. rile flow is regulated by storage in tl)e Cabello Dam 1~00 ft. upstreAm tram the stRUon. A 8lIl811 arroyo enters the
<br />l'"lver lrO#l the east side ..ppro~imately 1500 tt. l)bove the gage. This arroyo contributes momentary flood peaks 100-;00 C.t,B.
<br />onoe or twioe a year during the rainy season. However.this VOlum6 ot ~ter is relatively ~all and it is always possible
<br />to properly account for it.
<br />Reoords available.- Reoords began at station February 8. 1938 but prior to thi s date disoharge records are available tor the
<br />Rio Gr:nde at .l'eroha Dam since 1922. Percha Dem is a diversion 'MIil" located about 2 miles below Caballo Dam.
<br />Day J~. Feb. Mar. Apr. '.y J=. July Aug. Sept. Oct. Nov. Dec.
<br />1 64,4 588 1.lSO 2,~~O 7.390 5.060 6.140 ~,760 2.950 "1.690 463 76
<br />2 64,/, 771 1.150 2,290 7.1.40 5,030 6.160 ~,730 2.980 1,160 la8 16
<br />3 64,4 1.270 1.200 2.310 7,430 5.D90 5.2130 3.700 ~,O~O 1,130 495 19.6
<br />4 66.1 1.580 1.220 2,390 7.JJO 5."50 4.370 ~.670 ~.180 1,100 345 19.6
<br />5 67,8 1,haO 1.230 2,L.10 7.~20 5.700 4.370 ~,4~0 3,280 1.100 215 19.5
<br />6 69.5 1.480 1.250 2.160 7.3(;) 6.260 4.350 2.nO 3.200 1,100 1l,3 19.4
<br />7 69.5 1.600 1.250 2,!aO 7.360 6.060 4,270 2,7Lo 3,170 1.100 87.1 19.6
<br />6 74.6 1.690 1,250 2.400 7,~80 6.D90 4,240 2.700 ~.220 1,100 1~.9 19.9
<br />9 69.5 1.;60 1.250 2,250 7,390 6.1Lo 4.180 "2.690 3,190 1.000 13.9 2fr/
<br />10 69.5 1.260 1.250 2.260 7,L.I0 6,100 3,3(;) 2.710 3.270 954 13.5 640
<br />11 74.6 1.290 1.250 2,~60 7.L40 6.070 2.150 2.720 ~.300 ~Ll 13.7 497
<br />12 72.9 1,240 1.250 2.~60 7.590 6.080 3.190 2.720 3.~~0 13.7 497
<br />13 62 1.160 1.250 ~.510 7.610 6.070 ~.070 2,700 3.210 939 lJ.7 798
<br />14 74.6 1.160 1.250 2.670 7.620 6.070 2,900 2,770 3,120 934 12.5 970
<br />15 74.6 1,180 1.250 2.970 7.610 6.080 2.970 2.820 ~.210 613 13.1 970
<br />,6 72.9 1.160 1,250 2.970 7.610 6.070 2.960 2,760 ~.180 JJ9 1~., 970
<br />17 69.~ 1.180 1.250 3.040 7.610 6,080 ~.180 2.740 3.250 20.4 13 721
<br />18 64, 1.160 1,260 ~.100 7.610 6.D90 3.560 2,710 2.760 13 13.2 400
<br />'9 66.1 899 1.260 ;.100 7,630 6.090 3,560 2,730 2.230 8.9 468 276
<br />20 66.1 659 1.260 ~.180 7.650 6.D90 3,550 2.690 3.150 7.7 731 151
<br />21 64.4 859 1.~30 ~.450 6.580 6,080 ~.570 2.~80 3.oLO 6 543 67.9
<br />22 67.8 8S9 1.430 3.470 ~.2j0 6.060 3.690 2.110 3,190 8.6 543 27.3
<br />23 72.9 891 1.4LO 3.950 .690 6.060 3.nO 3.070 3.a,0 8.9 543 25.6
<br />24 78 859 1.660 4.730 5.110 6.110 ~.790 2.960 3.290 9.2 543 25.9
<br />25 64 668 1,910 5.170 5.220 6.D90 3.770 2,870 2.970 10.4 543 "'.4
<br />26 90 1.070 1._ 5.620 5,?l0 6.050 3,780 2,910 2.710 15.6 364 35
<br />27 102 1,170 1.830 6.980 5,~20 6.030 3.760 2.870 2,710 16 m 36.5
<br />28 113 1.170 1.990 7.000 5.260 6.000 3.790 2._ 2,710 20.8 38.6
<br />~ 115 2.160 7.190 5.080 5.990 ~.760 2.980 2,710 340 113 40.4
<br />~~~ 2,160 7.270 2.g~ 6.100 ~.4l0 ~.~ 2.700 112 Jr..2
<br /> 2200 940
<br /> !lonth Total di soharge Seeond- Illlximum Minimum 1tl)a1l Run-off in
<br /> in aore.feet toot.days acrl)-teet
<br />January..... ...... ...... ..... ................. .L..~... 2,l~29.5 124 64.4 78.4 4.820
<br />February................................ ..... .6l.i.~Q... ~.401 1,890 588 "lJ.7 64.270
<br />Karch. ... . .... .. .. . . . .... .. .... . .. . ... . . .... . .ee.6le... .720 2.200 1,150 1. 3 88.700
<br />April................ .......... ... ... ...... ..~l?~79... 107.050 7.270 2.250 3.568 212,~30
<br />..y.. ...., ,.,., ....' ...". ..... .....,.., ... ..41~.634,.. 207.920 7,650 4.690 6,707 412.400
<br />June. .............. ...... ........ .... ... .....353.997... 176.3(;) 6.260 5.030 5.945 ~53.770
<br />July........................................ .~3.C{l9... 117.820 6.160 2.150 3.801 2S~ .690
<br />Augu.st....................... ............... .17e.ew... 9O.D90 3,76lJ 2.110 2.906 178.690
<br />Saptember.................... ... .............1el.~69... 91.Mo 3,330 2,230 3.049 181,450
<br />October..................................... "}Z,390... 17.820.5 1.690 7.7 575 tt./,50
<br />N.ovember............ ....... ....... ..... .... ...1 .JiJIJ... 7.264.6 731 12.5 243 . 50
<br />December..................................... .16.Q~3... 8,066.4 970 ,6 260 16.000
<br /> year........ ... ....... .......... .!.m.997... 905.1#1 7.650 7.7 2.4m 1.795,900
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<br />rotal discharge in aore-feet is Rio Gran4e plul BoPita Diteh.
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