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<br />48
<br />
<br />FLOODS OF SEPT. '970 IN ARIZ., UTAH, COLO., AND N. MEX.
<br />(5) Big Canyon near Dove Creek, Colo.
<br />
<br />STATION DATA-DOLORES RIVER BASIN
<br />
<br />49
<br />
<br />(7) Dolores River below West Paradox Creek, near Bedrock, Colo.
<br />
<br />(Miscellaneous site)
<br />
<br />(Miscellaneous site)
<br />
<br />Location. --Lat 37"47'42". long 108050'26", in SEtSWt sec. 22, T. 41 N., R. 18 W.. 0.8 mi
<br />(1. 3 kIn) upstream from mouth and 4 mi (6 kIn) northeast of Dove Creek.
<br />
<br />Drainage area. --10. 7 mi2 (27. 7 km2).
<br />
<br />Maximum. --Sept. 4-18. 1970: Discharge. 2,400 ft3fs (68.0 ro3/s) 1800 hours Sept. 5,
<br />by indirect measurement of peak flow.
<br />(6) 09168100. Disappointment Creek near Dove Creek, Colo.
<br />
<br />Location. --Lat 3802}'2911, long 108049'52", in SWtNWt sec. 2, T. 47 N.. R. 18 W..
<br />Montrose County, 2.5 roi (4.0 km) downstream from West Paradox Creek and 4.4 roi
<br />(7.1 km) northeast of Bedrock.
<br />Drainage area. --2, 100 mi2 (5,440 km2), approximately.
<br />Maximum. --Sept. 4-18, 1970: Discharge, 5,710 ft3/s (162 m3/s) Sept. 6, by slope-
<br />area measurement of peak flow.
<br />
<br />Location. --Lat 37"5213511, long 108G34'5511, in SEt sec. 25, T. 42 N., R. 16 W., Dolores
<br />County, 0.2 mi (0. 3 kIn) downstream from ford, 6.5 mi (10.5 km) southeast of Cedar,
<br />and 19 mi (31 km) northeast of town of Dove Creek.
<br />
<br />Drainage area. --145 mi2 (376 km2).<
<br />
<br />(8) 09172500. San Miguel River near Placerville, Colo.
<br />
<br />Gage-height record. --Water-stage recorder graph. Altitude of gage is 6,420 ft
<br />(1, 957 m), from topographic map.
<br />
<br />Location. --Lat 38G02'0511, long 108G07115", in NWtSWt sec. 30, T. 44 N., J:t. 11 W.,
<br />San Miguel County, on right bank O. 7 mi (1. 1 kIn) downstream from Specle Creek
<br />and 4 mi (6 !un) northwest of Placerville.
<br />Drainage area. --308 mi2 (798 km2).
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 250 ft";i/s (7. 1 m3/s) and by slope-area measurements at 824, 1,770, 2,240,
<br />and 4,360 ft3/s (23.3, 50.1, 63.4,' and 123 m3/s).
<br />
<br />Maxima. --Sept. 4-18, 1970: Discharge, 2,720 ft3/s (77. 0 m3/s) 1930 hours Sept. 5
<br />(gage height, 11. 65 ft or 3.551 m).
<br />1957 to August 1970: Discharge, 4,360 ft3/s (123 m3/a) July 13, 1965 (gage
<br />height, 1'3. '34 n or 4. 127 m), from rating curve extended above 250 U3/s
<br />(7.1 m3/s) on basis of slope-area measurements at gage heights 7.18, 9.86, 10.95,
<br />and 13.54 ft (2. 188, 3.005, 3.338, and 4. 127 m).
<br />
<br />Gage-height record. --Water-stage recorder graph. Datum of gage is 7,055.80 ft
<br />(2, 150. 608 m) above mean sea level (Bureau of Reclamation bench mark).
<br />
<br />Discharge record. --Stage-discharge relation defined by current-meter measurements
<br />below 1,900 ft"j/s (54 m3/s).
<br />Maxima. --Sept. 4-18, 1970~ Discharge, 1,880 ft3/s (5'3. 2 m3/s) 0500 hours Sept. 6
<br />--rgage height, 5.56 ft or 1.695 m).
<br />1909-12, 1930-34, 1942 to August 1970: Discharge, 10,000 ft3/s (283 ro3/s)
<br />Sept. 5. 1909 (result of failure of Trout and Middle Reservoir Dams).
<br />
<br /> Mean discharge, in cubic feet per second, 1970
<br />Day Discharge Day Discharge Day Discharge
<br />Sept. 4 2.9 Sept. 9 5.6 Sept. 14 19
<br /> 5 492 10 4.2 15 8.2
<br /> 6 89 11 3.9 16 7.6
<br /> 7 11 12 348 17 6.8
<br /> . 7.6 13 77 18 6.0
<br />
<br />Mean discharge, in cubic feet per second, 1970
<br />
<br />Discharge
<br />
<br />Day
<br />
<br />Discharge
<br />
<br />Gage height, in feet, and discharge, in cubic feet per second, at indicated time, 1970
<br />
<br />Day
<br />Sept. 4
<br />5
<br />6
<br />7
<br />.
<br />Gage height,
<br />
<br />20.
<br />325
<br />1,270
<br />624
<br />460
<br />
<br />669
<br />450
<br />370
<br />323
<br />292
<br />1970,
<br />
<br />Sept.
<br />
<br />9
<br />10
<br />11
<br />12
<br />13
<br />
<br />379
<br />326
<br />274
<br />334
<br />766
<br />
<br />Day
<br />Sept. 14
<br />15
<br />18
<br />17
<br />18
<br />
<br />Discharge
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br />height height height
<br />Sept. 4 Sept. 6 Con. Sept. 13
<br />2400 1. 24 3.0 2400 1.65 15 0030 6.35 630
<br />Sept. 5 Sept. 11 0100 4. 90 365
<br />1430 1.55 8.6 2400 1.11 3.9 0130 4.15 252
<br />1500 1. 80 16 Sept. 12' 0230 3. 53 168
<br />1530 4.20 260 1230 1.15 4.6 0400 2.90 95
<br />1600 4.43 294 1300 5.00 380 0600 2.20 42
<br />1630 3.55 162 1330 6.45 650 1200 1. 43 9.0
<br />1700 3.18 109 1400 7.20 810 1700 1.17 3.8
<br />1730 7.00 760 1430 5.90 542 1730 1. 76 20
<br />1800 9.00 1,330 1530 7.20 810 1900 1.63 15
<br />1930 11.65 2,720 1730 9.60 1,550 , 1930 2.65 78
<br />2130 11. 00 2,270 1800 5.15 407 2400 2.10 38
<br />2200 9.00 1,330 1830 6.10 580 Sept. 14'
<br />2330 6.00 580 1930 6. 00 560 0600 1.77 21
<br />2400 5.45 461 2000 6.25 610 0900 1.67 17
<br />Sept. 6 2130 4.40 290 I, 1030 1.76 20
<br />0400 3.24 131 2200 5. 70 506 1800 1. 54 12
<br />0800 2.65 65 2330 8.10 1,040 2400 1. 47 9.8
<br />1400 2.15 35 2400 8.00 1,010
<br />
<br />in feet, and dlscharge, in cubic feet per second, at indicated time,
<br />of San Miguel River near Placerville, Colo.
<br />
<br />Hour Gage Discharge Hour Gage Discharge Hour Gage Discharge
<br /> height height height
<br />Sept. 4 Sept. 7' Sept. 12-Con.
<br />2400 3.51 250 0300 4.45 736 2400 4.25 594
<br />Sept. 5 0800 4.36 671 Sept. 13'
<br />0700 3.42 22. 1230 4.26 601 0200 4.19 556
<br />1300 3.44 232 1800 4.14 526 0600 4.24 587
<br />1600 3.52 252 2400 4.12 514 1130 4.52 792
<br />1930 4.16 514 Sept. 11 1500 4.62 872
<br />2000 4.08 470 2400 3.49 255 1800 4.56 824
<br />2300 4. 34 636 Sept. 12 2030 4.61 864
<br />2400 4.68 907 0130 3.55 271 2130 4.76 997
<br />Sept. 6 1200 3.54 28. 2400 4.68 925
<br />0400 5.54 1,840 1330 3.43 240 Sept. 14'
<br />0500 5.56 1,880 1500 3.59 283 0200 4.66 898
<br />1000 5.13 1,370 1530 3.50 258 0500 4.43 713
<br />1400 4. 94 1,170 1800 3.60 286 1200 4. 32 622
<br />1800 4.80 1,030 1900 3.99 445 1600 4.43 699
<br />
<br />*Dailv means t.omputed from data in addition to fiJlUres shown.
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