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<br />78
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<br />FLOODS OF SEPT. 1970 IN ARIZ., UTAH, COLO., AND N. MEX.
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<br />STATION DATA-SAN JUAN RIVER BASIN
<br />
<br />79
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<br />(45) 09363500. Animas River near Cedar Hill. N. Mex.
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<br />(46) 09364500. Animas River at Farmington, N. Mex.
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<br />Location. --Lat 3~02'17'1, long 10.,-05212511, in sec. 7, T. 32 N.. R. 9 W.. La Plata
<br />County, Colorado, on right bank O. 8 mi (1. 3 km) downstream from Florida River,
<br />2.5 mi (4.0 km) upstream from Colorado-New Mexico State line, and B.5 mi
<br />(13.7 kIn) north of Cedar Hill.
<br />
<br />Location.~.Lat36043'12tl, longlOS012'08". inSEfsec.16. T.29N., R.13W.. San
<br />Juan County, on left bank at bridge on former State Highway 17, 0.6 mi (1. 0 km)
<br />downstream {rom bridge on State Highway 17, and 1. 3 (2. 1 km) upstream from
<br />mouth.
<br />
<br />Drainage area. --1,090 mi2 (2,820 Jan2), approximately.
<br />
<br />Drainage area. --I, 360 mi2 (3,520 lan2), approximately.
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<br />Ga~e-hei~ht record. --Water-stage recorder graph. Altitude of gage is 5,278 ft
<br />(1,508.7 m). from bridge-profile plans.
<br />
<br />Ga~e-height record. --Digital recorder tape punched at 30-minute intervals. Altitude
<br />of gage is 5,960 ft O. 817 m), from topographic map.
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements.
<br />
<br />Dischar~e record. --Stage-discharge relation defined by current-meter measurements.
<br />
<br />Maxima. --Sept. 4-18, 1970: Discharge, 10,940 ft3/s (310 m3/s) 0500 hours Sept. 7
<br />~ height. 8.25 ft or 2.515 m).
<br />1904 to August 1970: Discharge, about 25,000 ft3/s (710 m3/s) June 29, 1927
<br />(gage height, 8.5 ft or 2.59 m, site and datum then in use). from rating c~rve
<br />extended above 10,000 ft3/s (280 m3/s).
<br />Maximum flood known occurred Oct. 6, 1911, when a stage of about 16.5 ft
<br />(5.03 m) was reached (present site and datum).
<br />
<br />Maxima. --Sept. 4-18, 1970: Discharge, 12,140 ft3/s (344 m3/s) 1800 hours Sept. 6
<br />~ height, 11.30 ft or 3.444m).
<br />1933 to August 1970: Discharge, 13,100 ft3/s (371 m3/s) June 19, 1949 (gage
<br />height, 11. 45 ft or 3.490 m).
<br />A flood in October 1911 exceeded all other known floods at this location.
<br />
<br /> Mean diseharge, in cubic feet per second. 1970
<br />Day Discharge Day Discharge Day Discharge
<br />Sept. 4 498 Sept. 9 2, 110 Sept. 14 5,300
<br /> 5 1,290 10 1,800 15 3,970
<br /> 6 8,220 11 I, '590 16 2,740
<br /> , 6,200 12 1,480 17 2,170
<br /> 8 2,780 13 2,'590 18 1,850
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<br /> Mean discharge, in cubic feet per second, 1970
<br />Day Discharge Day Discharge Day Discharge
<br />Sept. 4 270 Sept. 9 2,330 Sept. 14 5,130
<br /> 5 781 10 1,770 15 4,640
<br /> 6 5,650 11 1.430 16 3,300
<br /> , 7,690 12 1,350 17 2,580
<br /> 8 3,420 13 1,720 18 2,160
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<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 5' Sept. 6*-Con. Sept. 13*-Con.
<br />0200 4.24 606 2200 10.83 10,960 2400 7.50 4,690
<br />0600 4.35 672 2400 10.39 9,870 Sept. 14'
<br />1200 4. 80 996 Sept. ,. 0400 7.64 4,980
<br />1800 5.42 1,570 0400 9.70 8,350 0600 8.14 5,910
<br />2400 6.28 2,480 0800 9.08 7,040 0800 7.96 5,570
<br />Sept. 6' 1200 8.53 5,990 1000 8.00 '5,650
<br />0200 7.01 3,450 1800 7.73 4,560 1200 8.01 5,670
<br />0600 8.10 5,170 2400 7.03 3,480 1800 7.80 5,270
<br />0800 8.42 5,780 Sept. 13' 2400 7.59 4,900
<br />1000 8.54 6,010 0200 5.10 1,560 Sept. 15'
<br />1200 8.54 6,010 0600 5.17 1,630 0600 7.37 4,430
<br />1400 9.29 7,450 1000 5.74 2,200 1200 7.06 3,940
<br />1600 10.98 11,340 1400 5.93 2,430 2400 6.56 3,210
<br />1800 11. 30 12,140 1800 6.55 3,250
<br />2000 11.05 11,510 2000 7. 05 3,970
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<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br />*Daily means computed from data in addition to figures shown.
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 5' Sept. 6' Con. Sept. 13 Con.
<br />0200 3.12 324 2400 7.40 8,170 2400 5,05 2,890
<br />1000 3.22 393 Sept. ,. Sept. 14
<br />1400 3.56 664 0200 7,75 9,230 0200 5.40 3,650
<br />1800 3. 90 963 0400 8. 00 10,090 0400 5.70 4,260
<br />2200 4.40 1,540 0500 8.25 10,940 0600 5.8-5 4,570
<br />2400 5.60 3,490 0600 8.10 10,430 1200 6. 40 5,900
<br />Sept. '* 1000 7.50 8,590 1400 6. 30 5,660
<br />0200 6.23 4,990 1400 7.00 7,190 1800 6.20 5,590
<br />0400 6. 66 6,000 1800 6.58 6,120 2400 5.98 5,190
<br />0600 6.30 5,170 2400 5,88 4,550 Sept. 15
<br />0800 6.10 4,750 Sept. 13 0200 5. 95 5,240
<br />1200 6.30 5,220 0200 4.05 1,210 1200 5. 66 4,590
<br />1400 6. 50 5,710 1200 4. 10 1,270 2400 4.90 3,080
<br />1800 6.70 6,220 1800 4.57 2,020
<br />2200 6.95 6,890 2200 5.20 3,130
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<br />* Daily means computed from data 10 addition to figures shown.
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