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<br />TRINITY RI ~ER r:.ASIN <br /> <br />08057200 White Rock Creek at Greenvi lle Avenue, Dallas, Tex. <br /> <br />LOCATION. ..~L,;lt 320t,3' 21", long 96Q'I5'23", Dallas County, on left bank 20 ft downstream from bridge on Greenvil1e Avenue in Dcll1as, <br />1.1 miles downstream from Texas and New Orleans Railroad Co. b,'idge, 1.2 miles downstr('am from Cottonwood Creek, 2.911liles <br />upstream from White Rock Lake, and 8.2 miles norUH'ast of Dallas County Courthouse. <br /> <br />DRAINAGE. AREA .~-66.4 sq mi. <br /> <br />PERIOD OF RECORD.--August 1961 to current year. <br /> <br />GAGE.--Water-stage recorder. Datum of gage is at mean sea level. Prior to Oct. 2'1, 1961, non recording lJage at same site and <br />datum. <br /> <br />AVERAGE DISCHARGE.alO years, 57.1 cfs (11.68 inches per year, 41,370 acre-ft per year). <br /> <br />EXTREMES.-,.Current yedr: Maximum discharge, 4,160 cfs July 28 (elevation, 485.25 ft); IlIininlUIT' daily, 0.01 cfs June 27, July 14. <br />Period of record: Maxi~lUm discharge, 38,100 cfs Sept. 21. 1964 (elevdtion, 490.43 ft); minimum dilily, 0.01 cfs July~, <br />1970, June 27, July 14. 1971. <br />Maximum elevation since at least 1886. that of Sept. 21. 1964. <br /> <br />REMARKS.--Records fair. Some regulation at low flow by on- and off-channel dams from whictl many small diversions are lIIade. The <br />Royal Oaks Country Club, 0.1 mile upstream, diverted 102 acre-ft during water year. The city of Richardson reported a discharge <br />of 2,400 acre-ft of sewage effluent into two tributaries above station. T~lelve recording rain gages are operated in basin <br />above station. <br /> <br />DAY <br /> <br />26 <br />27 <br />28 <br />29 <br />'0 <br />31 <br /> <br />TOTAL <br />MEAN <br />toiAX <br />"N <br />CFSM <br />IN. <br />AC-FT <br />ett) <br /> <br />CAL YR 1970 <br />WTR YR 1971 <br /> <br />DISCHARGE, IN CUBIC FEET PER SECOND. WATER YEAR eCTOnER 1970 TO SEPTEMBER 1971 <br /> <br />I <br />2 <br />, <br />4 <br />, <br /> <br />b <br />1 <br />a <br />9 <br />10 <br /> <br />11 <br />9.0 <br />21 <br />14 <br />" <br /> <br />0<1 <br />12 <br />" <br />9.9 <br />8.1 <br />l2 <br /> <br />10 <br />9.0 <br />9.0 <br />9.0 <br />8.0 <br /> <br />NO' <br /> <br />8.0 <br />8.0 <br />8.0 <br />a.o <br />8.0 <br /> <br />a.l <br />8.0 <br />a.o <br />8.0 <br />\5 <br /> <br />19 <br />\5 <br />9.3 <br />'.1 <br />1.5 <br /> <br />7.8 <br />a.1 <br />'r.8 <br />7.2 <br />8.1 <br /> <br />32 <br />)4 <br />b.' <br />1.5 <br />b.S <br /> <br />Dee <br /> <br />9.0 <br />9.b <br />9.' <br />8.1 <br />'.4 <br /> <br />9.b <br />... <br />7.5 <br />a.o <br />8.0 <br /> <br />9.0 <br />5., <br />5.5 <br />8.4 <br />11 <br /> <br />JAN <br />9.3 <br />'.7 <br />l2 <br />b.2 <br />5.5 <br /> <br />b.O <br />5.' <br />b.S <br />l) <br />6.2 <br /> <br />'" <br /> <br />18 <br />H <br />2b <br />11 <br />11 <br /> <br />11 <br />15 <br />lh <br />" <br />l2 <br /> <br />14 <br />11 <br />1.8 <br />1.' <br />1.2 <br /> <br />9.2 <br />7.[ <br />8.2 <br />'.2 <br />l2 <br /> <br />l2 <br />l2 <br />l2 <br />9.2 <br />4.8 <br />b.2 <br /> <br />)10.6 <br />12.0 <br />31 <br />4.' <br />.18 <br />.21 <br />135 <br />.31 <br /> <br />MIN .01 <br />MIN .01 <br /> <br />MAR <br /> <br />1.3 <br />1.0 <br />8.4 <br />'.0 <br />8.1 <br /> <br />5.' <br />106 <br />132 <br />15 <br />53 <br /> <br />AeR <br /> <br />5.5 <br />5.8 <br />1.0 <br />8.1 <br />a.l <br /> <br />8.1 <br />8.1 <br />1.8 <br />8.1 <br />7.8 <br /> <br />8.1 <br />4.4 <br />'.1 <br />1.9 <br />2.1 <br /> <br />55 <br />5.9 <br />'.9 <br />'.2 <br />2.b <br /> <br />MAV <br /> <br />4.4 <br />5.' <br />3.6 <br />'.0 <br />4.1 <br /> <br />4.9 <br />,., <br />'.2 <br />'.2 <br />1.2 <br /> <br />'" <br />2.1 <br />1.6 <br />1.8 <br />1.9 <br /> <br />2.1 <br />2.0 <br />2.6 <br />2.2 <br />I.' <br /> <br />735 <br />15 <br />10 <br />9.8 <br />2.1 <br /> <br />JUN <br /> <br />5.9 <br />5.6 <br />4.5 <br />1.9 <br />1.5 <br /> <br />6.6 <br />'.4 <br />4.8 <br />1.4 <br />1.2 <br /> <br />1.5 <br />1.6 <br />2.2 <br />3.1 <br />1.1 <br /> <br />.98 <br />1.1 <br />1.5 <br />2.U <br />2.2 <br /> <br />.42 <br />.H <br />.18 <br />11 <br />24 <br /> <br />11 <br />l2 <br />" <br />14 <br />\5 <br /> <br />60 <br />18 <br />15 <br />13 <br />11 <br /> <br />8.0 <br />8.0 <br />20 <br />" <br />11 <br /> <br />'0 <br />9.9 <br />9.3 <br />8.1 <br />1.2 <br /> <br />10 <br />9.3 <br />9.5 <br />10 <br />9.b <br /> <br />216.1 <br />9.21 <br />20 <br />1.2 <br />.14 <br />.Ib <br />5>2 <br />.44 <br /> <br />TOTAL 20,313.71 <br />TOTAL 7,584.14 <br /> <br />b.S <br />b.' <br />1.2 <br />b.2 <br />19 <br />13 <br /> <br />396.8 <br />12.11 <br />19 <br />b.2 <br />.19 <br />." <br />187 <br />1.17 <br /> <br />205.2 <br />6.62 <br />l2 <br />'.8 <br />.10 <br />.11 <br />.01 <br />.30 <br /> <br />MEAN 55.7 <br />r-o.EAN 20.8 <br /> <br />7.0 <br />8.1 <br />7.2- <br />1.8 <br />12 <br /> <br />8.1 <br />5.8 <br />8.1 <br />1.0 <br />1.5 <br /> <br />11 <br />.. <br />1.2 <br />b.' <br />'.b <br /> <br />491.l <br />L6.6 <br />13> <br />1.9 <br />.25 <br />.?8 <br />9a6 <br />2.35 <br /> <br />15 <br />11 <br />" <br />1.0 <br />b.7 <br /> <br />5.8 <br />5.2 <br />'.4 <br />8.4 <br />4.9 <br /> <br />.b8 <br />111 <br />5.4 <br />lbl <br />14 <br />8.9 <br /> <br />.Ol <br />.01 <br />" <br />1.1 <br />3.1 <br /> <br />391.41 <br />13.0 <br />235 <br />.01 <br />.20 <br />.22 <br />11b <br />1.65 <br /> <br />IN 11.38 <br />IN 4.25 <br /> <br />2.6 <br />1.1 <br />'.7 <br />l20 <br />11 <br /> <br />'.4 <br />45 <br />b18 <br />143 <br />31 <br />12 <br /> <br />1,051.65 <br />H.9 <br />b18 <br />.01 <br />.51 <br />.59 <br />2,090 <br />4.25 <br /> <br />PEAK DISCKARGE (BASE, 2,900 CFS).--July 28 (1430) 4,160 cfs (485.25 ft); Aug. 14 (l70D) 4,140 cfs (485.23 ft). <br /> <br />AC-FT 40,290 <br />AC-FT 15,040 <br /> <br />Ib <br />11 <br />18 <br />19 <br />20 <br /> <br />10 <br />10 <br />9.0 <br />'.0 <br />8.0 <br /> <br />7.0 <br />7.5 <br />1.8 <br />b.O <br />5.0 <br /> <br />5.2 <br />14 <br />64 <br />19 <br />1.5 <br /> <br />tt Weighted-mean rainfall, in inches, based on 12 rain gages. <br />NOTE.--No elevation record Oct. 17 to Nov. 16. <br /> <br />21 <br />22 <br />" <br />24 <br />2S <br /> <br />.8.0 <br />8.0 <br />200 <br />25 <br />15 <br /> <br />" <br />l2 <br />II <br />11 <br />10 <br />10 <br /> <br />614.6 <br />19.8 <br />200 <br />8.0 <br />.30 <br />.34 <br />I,nO <br />2.66 <br /> <br />'.4 <br />5.0 <br />4.4 <br />b.O <br />5.8 <br /> <br />145 <br />24 <br />" <br />24 <br />61 <br /> <br />5.0 <br />4.0 <br />'.8 <br />4.b <br />5.5 <br />5.' <br /> <br />28 <br />24 <br />18 <br /> <br />5'H.<) <br />ll. L <br />145 <br />4.b <br />.32 <br />.33 <br />L,I10 <br />1.94 <br /> <br />MAX 2,250 <br />MAX 1,120 <br /> <br />-17- <br /> <br />506.88 <br />L6.4 <br />111 <br />.68 <br />.25 <br />.26 <br />l,OIO <br />3.33 <br /> <br />CFSM ,84 <br />CFSM .31 <br /> <br />JUC <br /> <br />2.1 <br />1.8 <br />1.5 <br />2.' <br />I.' <br /> <br />9.' <br />8.9 <br />8.5 <br />"' <br />130 <br /> <br />.81 <br />.15 <br />2.1 <br />1.1 <br />1.1 <br /> <br />" <br />51 <br />l2 <br />8.2 <br />b.b <br /> <br />1.' <br />1.2 <br />.03 <br />.01 <br />.l2 <br /> <br />S.B <br />1.1 <br />8.9 <br />1,120 <br />93 <br /> <br />30 <br />21 <br />lb <br />13 <br />II <br /> <br />,.. <br />9.' <br />8.1 <br />104 <br />211 <br /> <br />48 <br />" <br />13 <br />10 <br />9.9 <br />8.4 <br /> <br />l,lfl2.4 <br />10.4 <br />1,120 <br />5.8 <br />t.06 <br />I.i'? <br />4,330 <br />6.26 <br /> <br />'UG <br /> <br />see <br /> <br />1.' <br />41 <br />13 <br />8.0 <br />b.4 <br /> <br />6.J <br />5.2 <br />4.4 <br />3.5 <br />3.9 <br /> <br />1.6 <br />J.G <br />4.2 <br />2.b <br /> <br /><'.2 <br /> <br />2.b <br />'.0 <br />2.8 <br />4.1 <br />3.1 <br /> <br />3.2 <br />Q8 <br />61 <br />.0 <br />% <br /> <br />" <br />13 <br />11 <br />'.1 <br />8.1 <br /> <br />497.5 <br />l6.6 <br />" <br />2.2 <br />.2':> <br />.18 <br />987 <br />2.58 <br /> <br />tt 35.76 <br />tt 21.24 <br />