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<br />TRINIlY RIVER BASIN <br /> <br />08057100 White Rock Creek at Keller Springs Road. Oallas. Tex. <br />LOCATION.--Lat 32"58'13". long 96"48'19", Dallas County, on left bank at downstream side of bridge on Keller Springs Road. 0.5 <br />mile upstream from St. louis Southwestern Railwl,)' Unes bridge. 0.9 mile upstream from Spanky Branch. and 13 miles north of <br />Dallas County Courthouse. <br />DRAINAGE AREA.--29.4 sq mi, <br />PERIOD OF RECORD.--August 1961 to current year. <br />GAGE,--Water-stage recorder. Datum of gage is at mean sea level. Prior to Oct. 25. 1961, non recording gage at same site and <br />datum. <br /> <br />AVERAGE DISCHARGE.--10 years, 17.7 cfs (8.18 inches per year. 12,820 acre-ft per year). <br /> <br />EXTREMES ,--Current year: Maximum discharge, 3.100 cfs Aug. 14 (elevation. 556.10 ft); no flow at times. <br />Period of retard: Haxill'lJm discharge, 37,900 cfs Sept. 21.1964 (elevation. 574.51 ft), from rating curve extended above <br />5,000 cfs on basis of contracted-opening measurement of 37,900 cfs; no flow for many days most years. <br />Maximum elevation since at least 1886, that of Sept. 21, 1964. Flood of Apr. 19, 1942, reached an elevation of 569.6 ft. <br />from information by local resident. <br /> <br />REMARKS.--Records good except those for periods when stage.dlscharge relation was indefinite, which are poor. The Preston Trail <br />Golf Club. 0.5 mile upstream, diverted 243 acre-ft during year for irrigation. Flow slightly regulated by two small floodwater- <br />retarding structures above station. Three recording rain gages are operated in the basin above station. <br /> <br />c,o\y <br /> <br />16 <br />17 <br />b <br />I" <br />" <br /> <br />f(Ho\l <br />I"t6'J <br />';"X: <br /> <br />,,'J:, <br /> <br />CF<;f.' <br /> <br />['j. <br />~,.-l- T <br />(tt) <br /> <br />, <br />, <br />, <br />, <br /> <br />, <br />7 <br /> <br />, <br />I" <br /> <br />11 <br />IZ <br />13 <br />14 <br />" <br /> <br />" <br />" <br />n <br />H <br />"c <br /> <br />1.2 <br />1.2 <br />6b <br />I' <br />'.H <br /> <br />IJeT <br /> <br />DISCHARGE, IN CUBIC fEET PER SECOND. WATER YEAR OCTOBER 1970 TO SEPTEMBER 1971 <br /> <br />JUN <br /> <br />J.B <br />3.2 <br />3.2 <br />3.2 <br />2.8 <br /> <br />1.0 <br />1.0 <br />1.1 <br />1.7 <br />1.7 <br /> <br />NOV <br /> <br />DEe <br />1.0 <br />1.0 <br />1.0 <br />1.0 <br />1.0 <br /> <br />21, <br />21 <br />2 ~ <br />J'-, <br /> <br />~ c, <br /> <br />" <br /> <br />t41.2 <br />4.'1l <br />bb <br />1.7 <br />.t(, <br />.'" <br />:'-H.> <br />2.50 <br /> <br />3.2 <br />7.8 <br />7.8 <br />7.8 <br />7.0 <br /> <br />1.7 <br />1.7 <br />2.0 <br />1.0 <br />.OS <br /> <br />1.0 <br />1.0 <br />1.0 <br />.90 <br />1.0 <br /> <br />1.4 <br />1.4 <br />1.2 <br />.18 <br />1.7 <br /> <br />'.7 <br />1.7 <br />1.4 <br />1.2 <br />1.0 <br /> <br />\.4 <br />2.4 <br />1.7 <br />1.4 <br />1.0 <br /> <br />1.0 <br />\.0 <br />1.0 <br />1.0 <br />2.4 <br />2.0 <br /> <br />.,;5 <br /> <br />H.&3 <br />1.2'" <br />2.4 <br />." <br />.04 <br />.05 <br />N <br />.97 <br /> <br />3.7 <br />b.O <br />7.4 <br />1.1 <br />1.7 <br /> <br />.ba <br />.78 <br />1.7 <br />5.2 <br />2.8 <br /> <br />.lb <br />'>5 <br />.49 <br /> <br />CAL YR 1970 TOTAL 6,210.34 <br />WTR YR 1971 TOTAL 1,180.63 <br /> <br />1.7 <br />1.7 <br />\.7 <br />1.7 <br />1.4 <br /> <br />2.0 <br />2.0 <br />2.4 <br />1.4 <br />1.2 <br /> <br />1.7 <br />1.4 <br />1.4 <br />1.4 <br />1.2 <br /> <br />1.2 <br />1.2 <br />1.0 <br />1.0 <br />1.0 <br /> <br />1.0 <br />.90 <br />.90 <br />2.0 <br />1.7 <br /> <br />1.4 <br />1.2 <br />1.2 <br />1.2 <br />1.0 <br /> <br />'4.22: <br />1.tO <br />2.0 <br />.78 <br />.04 <br />.04 <br />b' <br />.50 <br /> <br />MEAN 1"7.0 <br />MEAN 3.23 <br /> <br />JAN <br /> <br />FE' <br />.70 <br />.70 <br />.10 <br />1.0 <br />.91 <br /> <br />"AR <br />2.4 <br />2.4 <br />2.' <br />2.' <br />2.' <br /> <br />.90 <br />.90 <br />.ao <br />..0 <br />.ao <br /> <br />2.2 <br />2.2 <br />2.1 <br />2.1 <br />2.0 <br /> <br />1.7 <br />1.7 <br />1.4 <br />I.- <br />1.4 <br /> <br />'.0 <br />1.2 <br />1.2 <br />1.7 <br />1.2 <br />1.2 <br /> <br />1.4 <br />\.4 <br />1.2 <br />lov <br />loG <br /> <br />2.0 <br />1.4 <br />I.! <br />1.0 <br />.90 <br /> <br />..0 <br />. .0 <br />3.0 <br />1.5 <br />1.0 <br /> <br />..0 <br />..0 <br />.90 <br />.90 <br />..0 <br /> <br />5.0 <br />3.0 <br />2.6 <br />2.4 <br />4.0 <br /> <br />2.0 <br />1.9 <br />1.9 <br />1.6 <br />1.7 <br /> <br />I.' <br />I.S <br />1.4 <br />I.' <br />1.2 <br /> <br />1.1 <br />1.0 <br />..0 <br />.80 <br />.70 <br /> <br />.bO <br />.50 <br />.40 <br />.'0 <br />. " <br />.20 <br /> <br />45.70 <br />1.47 <br />2.' <br />.20 <br />.OS <br />.0' <br />91 <br />.32 <br /> <br />PEAK DISCKARGE (BASE, 1,500 CFS).-.Aug. 14 (1430) 3,lOD cfs (556.10 ft). <br /> <br />47.~4 <br />1.uO <br /><-;.2 <br />.60 <br /> <br />.78 <br />.78 <br />.76 <br />. " <br />.;0 <br />.'0 <br /> <br />3.Cl <br />2.6 <br />2.4 <br /> <br />tt Weighted-mean rainfall. in inches, based on three rain gages. <br />NOTE.hStage-discharge relation indefinite Jan. 30 to Apr. 18. <br /> <br />46.'JI <br />1.oil <br />S.O <br />.70 <br />.Ob <br />.Ob <br />9' <br />1.80 <br /> <br />MAX 729 <br />MAX 561 <br /> <br />-16- <br /> <br />.02 <br />3.0 <br />1.5 <br />.88 <br />.53 <br /> <br />9.48 <br />.32 <br />3.0 <br />.01 <br />.01 <br />.01 <br />19 <br />2.54 <br /> <br />MIN 0 <br />MIN 0 <br /> <br />APR <br /> <br />.17 <br />.10 <br />.10 <br />.10 <br />.lO <br /> <br />.10 <br />.OS <br />.04 <br />.0' <br />.02 <br /> <br />.02 <br />." <br />.01 <br />.01 <br />.01 <br /> <br />14 <br />.80 <br />.40 <br />.27 <br />.17 <br /> <br />.37 <br />.44 <br />.53 <br />.53 <br />.37 <br /> <br />.1. <br />.13 <br />.0' <br />.03 <br />.02 <br /> <br />.01 <br />.05 <br />.10 <br />1.0 <br />.74 <br />.37 <br /> <br />22.46 <br />.12 <br />14 <br />.0\ <br />.02 <br />." <br />45 <br />3.54 <br /> <br />CFSM .58 <br />CFSM .11 <br /> <br />"AY <br /> <br />.0' <br />.19 <br />.31 <br />.19 <br />.37 <br /> <br />.b' <br />.88 <br />.., <br />.53 <br />.40 <br /> <br />.11 <br />.07 <br />.05 <br />.04 <br />.0' <br /> <br />.03 <br />.02 <br />.02 <br />.01 <br />.01 <br /> <br />.49 <br />.016 <br />.l9 <br />o <br />.0005 <br />o <br />1.0 <br />1.01 <br /> <br />IN 7.86 <br />IN 1.49 <br /> <br />.1. <br />.16 <br />.04 <br />o <br />o <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />o <br />D <br />o <br />o <br />o <br /> <br />.10 <br />o <br />o <br />o <br />o <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />.10 <br />.003 <br />.10 <br />o <br />.0001 <br />o <br />.2 <br />3.72 <br /> <br />AC-fT 12.320 <br />AC-fT 2.340 <br /> <br />JOt <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />o <br />o <br />o <br />o <br />7.1 <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />34 <br />17 <br />.37 <br />.05 <br />.01 <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />o <br />o <br />o <br />5bl <br />I. <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />1.7 <br />1.0 <br />..3 <br />.44 <br />.37 <br /> <br />o <br />o <br />o <br />o <br />o <br /> <br />.37 <br />.31 <br />.11 <br />I. <br />" <br /> <br />o <br />o <br />.10 <br />o <br />o <br />o <br /> <br />II <br />2.4 <br />1.5 <br />1.0 <br />1.0 <br />.a. <br /> <br />727.84 <br />23.5 <br />5'1 <br />o <br />.ao <br />.92 <br />1,440 <br />7.96 <br /> <br />AUO <br /> <br />SEP <br />.., <br />.88 <br />.88 <br />.53 <br />.37 <br /> <br />.37 <br />.37 <br />.'b <br />. 'b <br />.3b <br /> <br />.35 <br />.35 <br />.34 <br />.34 <br />.33 <br /> <br />.33 <br />.32 <br />.'2 <br />.31 <br />.31 <br /> <br />.'0 <br />2.0 <br />4.8 <br />I.S <br />l5 <br /> <br />8.4 <br />2.0 <br />I.S <br />I.S <br />1.2 <br /> <br />56.1>1 <br />1.89 <br />l5 <br />",0 <br />.00 <br />.07 <br />112 <br />2.82 <br /> <br />tt 37.02 <br />tt 28.17 <br />