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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />PROVISIONAL RECORDS
<br />
<br /> COLORADO RIVER AND TRIBUTARIES IN LOWER BAS'p.;: 0;::
<br /> Annual Summary :Cor Water Year endina Sent. 30 1959
<br /> , Lake Mead Colorado
<br /> I River
<br /> Little Virgin below
<br /> Colorado R. Lees Ferrv Paria R. Lees Ferry Colorado Colorado River-Grand Cannon' River Usable Evaporation af Hoover
<br /> Runoff Suspended Runoff Suspended River Runoff Suspended ( Little- Contents Dam
<br /> Sediment Sediment Cameron Sediment field end of mo.
<br />1958 Acre-feet Tons Acre-feet Tons Acre-f'eet Acre-feet Tons Acre feet Acre-feet TnehPR 'e"P_rPPr. " ,"_PM"
<br />~C". jlO,fOO 044,400 'of ~190 1<, "00 347,400 1,643,000' 6,360 22,895,000 8.93 104.700 728,300
<br />Nov. 357,200 885.300 1,010 2.030 70 385,800 468,8001 11,200 22,488,000 6.3 72. 600 745,800
<br />Dec. 365,000 772,800 953 352 27 386,600 255,200' 9,640 21,981,000 3.9 44,000 875,100
<br />1959
<br />Jan. 315,700 652,900 1,140 743 103 329,300 225,400 10,500 21,515,000 4.4 50,000 794,800
<br />Feb. 316,600 486,600 1,120 1,080 69 324,400 264,300 13,600 21,194,000 4., 49,300 647,500
<br />Mar. 345,800 457,500 832 1,050 1,960 366,200 *. ' 9,130 20,755,000 4.9 53,900 827,700
<br />Apr. 420,700 558,900 329 17 2,450 425,700 243,6OOi 4,510 20,230,000 '.9 63,100 916,200
<br />May 1,022,000 1,787,000 290 89 0 1,011,000 2,729,000, 4,060 20,220,000 7,4 78,700 949,400
<br />June 1,835,000 2,E?25,000 235 398 37 1,798,000 4,963,0001 3,640 21,169,000 8.4 90,700 759,900
<br />July 780,800 679,900 47' 20,190 94 798,000 684,700 3,880 21,,096,000 11.2 123,400 848,400
<br />Aug. 420,200 4;,879,000 ! 6,660 1,403,000 36,900 487,500 8,791,000 12,660 20,617 ,000 12.0 130,800 893,500
<br />Sept. 246,000 1,242,000 765 64,490 273 270,400 1,620,0001 4,130 20,036,000 11.3 79,600 773,200
<br />Total 6,736,000 15,550,000 ~4,'70 1,500,000 54,880 6,930,000 _u , 93,310 -2,859,000 89.1 940,800 9,758,000
<br /> , ,
<br /> Lake Colorado Havasu Colorado ~;versions between Colorado Diversian;:'",~t Colorado
<br /> Mohave River Lake River arokero An, River River Pilot
<br /> Usable below Usable below Colo. R. Palo below All Gila Gila below Knob
<br /> Contents Davis Contents Parker Indian Verde Clbola \ American Gravi ty River Yuma Return
<br /> end of mo. Dam end of mo. Dam Res. Canal Valley Canal Canal Dome EI ~
<br />1958 Acre-feet Acre-feet Acre-feet Acre feet Acre-feet Acre-feet Acre-feet I Acre-feet Acre-feet Acre-feet Acre-feet Acre-feet
<br />Oct. 1,562,000 673,400 563,300 606,300 21,670 63,900 590,500.' 478,100 55,820 14.1 181,200 43,560
<br />Nov. 1,594,000 696,000 545,200 624,800 19,070 56,100 589,700~ 437,800 38,980 0 206,900 98,270
<br />Dec. 1,648,000 802,300 547,400 758,500 22,460 57,180 752,100 572,700 40,850 0 250,400 284,900
<br />1959
<br />Jan. 1,680,000 747,700 547,700 669,800 21,300 56~540 663,900 512,200 35,520 5.0 210,200 219,800
<br />Feb. 1,700,000 616,700 549,000 595 ~ 600 14,540 59,880 581,900 451,600 39,500 24 181,700 149,500
<br />Mar. 1,703,000 807,900 567,100 693,800 40,100 86,220 637,700 469,800 67,370 7.5 169,600 6,040
<br />Apr. 1,650,000 965,000 549,400 839,200 40,000 80,070 777,1001 579,900 76,900 26 194,100 79,970
<br />May 1,774,000 814,800 599,800 719,400 30,970 101,100 654,600 510,500 81,500 113 140,200 22,340
<br />June 1,604,000 923,700 583,200 785,100 44,380 111,900 698,600- 535,400 97,170 6.3 124,200 70,650
<br />July 1,403,000 1,046,000 570,300 958,000 50,400 116,800 841,400 630,100 101,~00 147 170,100 126,400
<br />Aug. 1,388,000 904,500 ~49,OOO 878,500 41,040 91,190 816,600, 648,800 83,370 2,660 182,800 173,700 3
<br />Sept. 1,385,000 766,800 556,700 679,500 34,680 90,880 634,200 521,300 77,020 175 123,600 _4:5,600
<br />Total -177,000 9,765,000 -6,600 8,808,000 380,600 971,800 8,238,000 6,348,000 795,100 3,180 2,135,000 .1.,.31:9;000 '.-
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<br />Lake Mead evaporation computed by mass-transfer method. Figures of acre-feet
<br />determined from surface area of lake corresponding to average water surface
<br />elevation during month.
<br />Includes Yuma Main Canal wasteway and Reservation Canal Main Drain No.4.
<br />Includes flow through wasteway and powerplant returned to Colorado River.
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<br />DOUGLAS D. LBj'1~S.! '1f1S'tr~cJt Epgineer, Lr II t (:
<br />Tucson, Arlzon~ ~ Oot:" 12) 1959 -J
<br />- - yerott.
<br />OCT '.:.:" 1359 Mwt
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