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<br />TRINITY RIVER BASIN
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<br />08057400 White Rock Creek at Scyene Road. Dallas. Tex.
<br />LOCATION.--Lat 32045'57". long 96043'49", Dallas County. on left bank 30 ft downstream from Texas and Ne" Orleans Railroad Co.
<br />bridge, 125 ft downstream from Scyene Road (State Hlghway 352) 1n Dallas, 4.5 mlles east of Dallas County Courthouse, and 5.8
<br />miles upstream from TOOuth.
<br />
<br />DRAINAGE AREA.--122 sq mi.
<br />
<br />PERIOD OF RECORD.-~October 1962 to current year.
<br />
<br />GAGE.--Water-stage recorder. Datum of gage is at mean sea level. Prior to Dec. 7, 1962, nonrecording gage 30 ft upstream at
<br />same datum.
<br />
<br />AVERAGE DISCHARGE.--9 years, 94.4 cfs (10.51 inches per year, 68.390 acre-ft per year).
<br />
<br />EXTREMES.--Current year: Maximum discharge, 3,080 cfs Aug. 4 (elevation. 399.67 ft); minimum daily, 1.4 cfs for several days.
<br />Period of record: Maximum discharge, 30.200 cfs Sept. 21, 1964 (elevation, 404.30 ft), from rating curve extended above
<br />20,000 cfs on basis of contracted-opening measurement of 3\1,200 cfs; minimum daily, 0.4 cfs Aug. 2, 3, 1964.
<br />Maximum elevation since at least 1BB6, 409.2 ft May 26, 1908 (affected by backwater from the Trinity River); maximum discharge
<br />since at least 1886, that of Sept. 21, 1964; the second highest discharge occurred Apr. 20,1942 (28,000 cfs), from Geological
<br />Survey Open-File Report "Frequency and Extent of Flooding on Lower White Rock Creek at Dallas. Tex."
<br />
<br />REflIARKS.--Recards good. Flows affected by regulation and release of water due to intennittent removal of f1ashboards for construction
<br />purposes at White Rock Lake (capacity, 10,700 acre-ft, revised, at normal level) 4.5 miles upstream. The Dallas Power and
<br />Light Conlpany reported divf'rsion of 1,790 acre-ft to off-channel reservoir at generating plant 0.8 mile upstream from station.
<br />Low flow sustained by wastewater and splash-over at sril1way at White Rock Lake due to wind action. Fourteen recording rain
<br />gages above st<ltion and one at station are operated in basin.
<br />
<br />REVrSJONS.--WRDTexas1970: Drain<lgearea.
<br /> DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1970 TO SEPTEMBER 1971
<br />DAY OCT NOV DEe J'N FE. M'R ,PR MAY JUN JUL 'UG SfP
<br />I 5.2 53 ... 11 2.0 15 1.5 I.. 3. 12 .1 ...
<br />2 .3 .. 11 ..T 2.. 115 I.' 1.5 18 32 22 50
<br />3 .. .. 12 2. 3.3 ., I.. I.' 1.1 ... 12 ..
<br />. .0 .. 58 ..0 " .. 1.1 1.5 I.. '.3 191 51
<br />5 '1 33 20 5.2 2.5 " 2.2 1.' I.. 2.5 122 ..
<br />. 3. 1.. " 3.. 2.0 " 1.5 3.' I.. 2.. 155 2.
<br />1 ., 11 I' 2.. 2.1 53 I.' 2.. 1.. 2.. .. 11
<br />. 5. 5.0 18 2.. 3.. 50 I.. 1.5 I.. 2.' .. 1.
<br />. " '1 15 2.' '.5 .5 1.' 1.1 1.. 2.. .1 10
<br />10 .0 100 5.' 3.1 ,., .. 1.5 '.1 1.. 2.' 2. 5. ,
<br />11 118 5. 3.' 3.2 3.-7 43 1.5 14 1.1 2.1 15 '.1
<br />12 135 52 2.' '.3 3.. .. I.. 1.' 1.1 2.0 ... 3.5
<br />13 .0 5. 2.. ... 2.. 43 2.2 I.' I.. 2.0 14 3.0
<br />14 .2 .. 2.3 2.1 3.' 3. 2.1 I.' 1.1 2.1 1.. 3.'
<br />15 15 31 " 1.1 2.. 3. 1.. 1.1 2.0 2.. 1,260 3.0
<br />I. .1 2' 1.3 I.. ,.. 2. 5.. 1.1 2.0 2.1 151 2.5
<br />11 .2 2' ,.. 2.. 3.. 11 ,.0 I.. 2.0 2.2 .8 2.'
<br />18 58 28 3.' 2.3 11 '.3 15' 2.2 2.0 2.0 .. 2.3
<br />" 52 28 3.5 I.' .., 2.. .. 2.' 2.2 5.. 3. I.'
<br />20 22 2a 3.t 1.1 '.2 I.' 35 2.2 2.0 ... 18 I.'
<br />21 ..5 21 ..1 2.1 131 1.1 10 2.. 2. I.' ..1 2.0
<br />22 ... 2. 5.1 2.. III 2.' 13 2.1 108 I.' ... 25
<br />23 10. 2' 3.1 2.1 11 I.. 23 2.5 51 3.1 ... ..
<br />24 .1 1. 2.. I.' 51 '.0 2.2 2.. 21 ... 1'1 3.1
<br />25 .. 3.5 '.0 2.0 I.' .1 I.' 2.5 11 3.. .'2 '.1
<br />2. 1.0 3.' '.0 2.. 111 13 2.3 2.1 5.' 1.1 '25 10.
<br />21 12' '.3 2.' ..2 .. 5.' 2.5 111 3.2 30 .. 51
<br />2. .5 5.1 3.2 2.1 85 '.3 I.' ... .. 300 53 .5
<br />2' .2 ..2 3.5 2.5 3.2 2.3 ". 3. 111 .2 35
<br />30 5. ..8 .8 3.0 I.' 2.0 ". 32 32. 23 20
<br />31 5. 13 2.1 1.' 58 15 12
<br />TOTAL 1.953.5 B97.7 347.5 126.3 955.3 999.0 50or..8 841.0 462.7 10569.9 or..868.7 1.486.9
<br />MEAN 63.0 29.9 11.2 4.07 34.1 32.2 16.8 21.1 15.4 50.6 151 49.6
<br />MAX ,.0 100 .8 2. 18. 115 180 "8 108 111 1,260 .81
<br />MIN ... 3.3 2.3 I.. 2.0 1.. I.. I.' I.. 1.1 .,1 I.'
<br />CFSM .52 .25 .0' .03 .2. .2. .t. .22 .13 ... 1.29 .'1
<br />IN. ..0 .21 .11 .0' .2' .30 .15 .2. .14 ... 1.48 ...
<br />AC.-FT 3.870 1.180 ... 251 1.890 1,980 1.000 1,610 '18 3.110 9.660 2.950
<br />eAL YO 1970 TOTAL 39,465.7 MEAN 108 HU 3.260 MIN 1.8 CFSJIt .8' IN 12.03 AC-FT 78,280
<br />wTR YR 1971 TOTAL 15,013.3 MEAN Itl.1 MAX 1.260 "'IN 1.4 CFSM .34 IN 4.58 AC-FT 29.780
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<br />-19-
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