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<br />
<br />FLOODS OF SEPT, 1970 IN ARIZ" UTAH, COLO" AND N. MEX.
<br />
<br />STATION DATA-LITTLE COLO. RIVER BASIN
<br />
<br />91
<br />
<br />Little Colorado River at Holbrook, Ariz.-Continued
<br />
<br />(64) 09398000. Chevelon C~eek near Winslow, Ariz.
<br />Location. --Lat 34055'35". long 110031'51", in SEtSWt sec. 27, T. 18 N.. R. 17 E..
<br />Navajo County, on right bank 3 roi (5 kIn) upstream from mouth and 12 roi (19 \un)
<br />southeast of Winslow.
<br />
<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 />2230 12.62 9,370 1800 12.75 9,510 Sept. 8-
<br />2330 12.60 9,270 1900 12.98 9,180 0600 9.12 371
<br />2400 12.80 10,200 2130 13.20 9,560 1200 8.85 217
<br />Sept. 6- 2230 12.98 8,520 1800 8.67 147
<br />0200 13.10 12,100 2400 12.50 6,670 2400 8.45 78
<br />0400 13.31 13,700 Sept. 7_
<br />0530 13.60 IS, BOO 0100 12.00 5,060
<br />0630 13.50 15,100 0200 11.65 4,110
<br />
<br />Draina~e area. --794 mi2 (2,056 km2), excludes 200 mi2 (516 km2) which is noncon-
<br />tributing.
<br />
<br />Gage-height record. --Digital recorder tape. Datum of gage is 4,899.5 ft 0,493.367 m)
<br />above mean sea level, datum of 1929.
<br />
<br />(63) 09397500. Chevelon Creek below Wildcat Canyon, near Winslow, Ariz.
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 2, 700 ft"J/s (76 m3/s) and extended above on basis of slope-area measurement
<br />of peak flow. .
<br />
<br />Maxima. --Sept. 4-10, 1970: Discharge. 8,020 ft3/a (227 m3/s) 1300 hours Sept. 6
<br />(gage height, 17.54 ft or 5.346 mI. I.,
<br />1916 to August 1970: Discharge, 25,300 ft3/s (718 m3/s) Jan. 19, 1952 (gage
<br />height, 19.8 ft or 8.04 m).
<br />
<br />a Estimated.
<br />>I< Daily means computed from data in addition to figures shown.
<br />
<br />Location. --Lat 34038'1111, long 110042'49", in SWt sec. 38, T. 15 N., R. 15 E., Navajo
<br />County, on right bank O. 4 mi (0. 8 km) downstream from Wildcat Canyon and 25 mi
<br />(40 km) south of Winslow.
<br />
<br />Day
<br />Sept. 4
<br />5
<br />6
<br />
<br />Mean discharge,
<br />Discharge Day
<br />4.0 Sept.
<br />18
<br />2,950
<br />
<br />in cubic feet per second, 1970
<br />Discharge Day
<br />7 1,510 Sept.
<br />8 442
<br />
<br />9
<br />10
<br />
<br />Discharge
<br />189
<br />80
<br />
<br />Drainage area. --275 mi2 (712 km2).
<br />
<br />Gal{e-height record. --Digital recorder tape except 1530 hours Sept. 8 to Sept. 10.
<br />Gage-height record reconstructed from normal recession and adjoining record.
<br />Datum of gage is 5,905.18 ft (I, 799. 893 m) above mean sea level, datum of 1929
<br />(Bureau of Reclamation bench mark).
<br />
<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br />,
<br />
<br />Mean discharge, in cubic feet per second, 1970
<br />
<br />Discharge Day Discharge Day
<br />
<br />o Sept. 7 750 Sept. 9
<br />534 a 300 10
<br />4,480
<br />
<br />Discharge
<br />100
<br />45
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 4 Sept. 8-Con. Sept. 8-Con.
<br />2400 2.38 1.8 1330 17.45 7,870 1915 14.94 4,750
<br />Sept. 5 1345 17.38 7,780 1930 14.80 4,840
<br />0800 2.38 2.3 1400 17.30 7,830 1945 14.88 4,540
<br />1200 2.38 2,3 1415 17.25 7,550 2000 14.54 4.430
<br />1800 2.44 3,8 1430 17.19 7,450 2030 14.29 4,230
<br />2100 3.50 58 1445 17.08 7.250 2100 14.05 4,060
<br />2400 3.83 85 1500 17.04 7,210 2130 13.80 3,880
<br />Sept. 6 1515 16.91 7,020 2200 13.57 3,720
<br />0100 3.80. lS4 1530 16.79 8,840 2230 13.36 3,570
<br />0300 3. 55 126 1545 18.71 6,720 2300 13.14 3,420
<br />0500 3.38 106 1600 16.59 6,540 2330 12.89 3,250
<br />0'700 3.21 91 1615 16.50 6,400 2400 12.71 3,150
<br />0900 3.07 79 1830 18.39 6,250 Sept. 7
<br />1100 2.98 70 1845 18.18 5,940 0300 11.65 2,520
<br />1115 8.39 1,150 1700 16.10 5,8'70 0800 10. 71 2,050
<br />1130 13.06 3,360 1715 16.00 5,760 0900 9.82 1,880
<br />1145 15.46 5,210 1730 15.89 5,640 1200 9.05 1,380
<br />1200 16.47 6,360 1745 15.74 5,490 1500 8.41 1,160
<br />1215 17.03 7,200 1800 15.57 5,320 1800 7.86 993
<br />1230 17.32 7,660 1815 15.47 5,220 2100 7.38 849
<br />1245 17.44 7,850 1830 15.29 5,060 2400 6.95 738
<br />1300 17.54 8,020 1845 15.21 4,990
<br />1315 17,49 7,930 1900 15.05 4,840
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 6,300 ft3/s (180 m3/s) and by Slope-area measurement at 19,800 ft3/s
<br />(561m3/s),
<br />
<br />Maxima, --Sept, 4-10, 1970: Discharge, 11,100 ft3/s (314 m3/s) 2300 hours Sept. 5
<br />(gage height, 13.58 ft or 4. 139 m).
<br />1947 to August 1970: Discharge, 19,800 ft3/s (561 m3/s) Jan, 18, 1952 (gage
<br />height, 18.2 ft or 5.55 m).
<br />
<br />Day
<br />Sept. 4
<br />5
<br />6
<br />
<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. 4 Sept. 6- Sept. 6*-Con.
<br />2400 0,81 0 0030 12.25 8,840 1200 8.52 3,490
<br />Sept. S- OlDO 11.57 7,760 1500 7.60 2,500
<br />1200 ,81 0 0130 10,81 8,620 1800 6.9 1,880
<br />2000 .81 0 0200 12.57 9,350 2400 6.2 1,320
<br />2100 ,81 0 0230 13.47 10,900 Sept. 7_
<br />2200 .81 0 0300 13,28 10,500 0600 5.6 955
<br />2230 .81 0 0400 12.73 9,610 1200 5.2 750
<br />2245 13.35 10,700 0500 11. 96 8,380 1800 4.8 572
<br />2300 13.58 11,100 0600 11. 46 7,590 2400 4,5 457
<br />2330 12.14 8,880 0800 10.19 5,710
<br />2400 10.99 6,890 1000 9.23 4,380
<br />
<br />>I< Daily means computed from data 10 addIhon to fIgures shown.
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