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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />, <br />I <br />I <br />I U) <br /> IIJ <br />I :I: <br />(.) <br />~ <br /> z <br />I :J: <br />~ <br />~.-.' <br />I 0 <br />..J <br /> ..J <br />I ~ <br />z <br />C( <br /> Q: <br />I ..J <br />~ <br />g <br />I <br />I <br />... <br />I <br />. <br />I <br /> <br />...,. ...a L1.. <br /> <br />5 <br /> <br />5 <br /> <br />U) <br />IIJ <br />:I: <br />(.) <br />Z <br /> <br />Z <br /> <br />:I: <br />I- <br />a.. <br />IIJ <br />o <br />..J <br />..J <br />~ <br />Z <br /><t <br />Q: <br />..J <br />~ <br />~ <br /> <br />24 HR <br /> <br />4 <br /> <br />4 <br /> <br />3 <br /> <br />3 <br /> <br />6 HR <br /> <br />2 <br /> <br />2 <br /> <br />1 HR <br /> <br />35 40 4e so <br /> <br />60 70 80 90 <br /> <br />o <br />100 <br /> <br />o <br /> <br />(Yea..) 1 <br /> <br />2 <br /> <br />10 <br /> <br />. <br /> <br />.. <br /> <br />.0 <br /> <br />20 <br /> <br />30 <br /> <br />. <br /> <br />7 <br /> <br />. <br /> <br />3 <br /> <br />4 <br /> <br />. <br /> <br />RETURN PERIOD IN YEARS <br /> <br />Slope Br.ok Lint <br /> <br />3 <br /> <br /> Slope Break LiM <br /> 5 <br />NOTE: 5 minute value is <br /> 42% of 30 minute <br /> valu.. <br /> 4 <br /> " '" 20 ... 40 "" 80 100 120 150 180 240 300 <br /> <br />2 <br /> <br />o <br />(Min.) 5 <br /> <br />360 <br />6 <br /> <br />30 <br /> <br />60 <br />1 <br /> <br />4 <br /> <br />5 <br /> <br />" 1-12 <br /> <br />5 <br /> <br />100 Y R <br /> <br />4 <br /> <br />3 10 YR <br /> <br />2 <br /> <br />2 YR <br /> <br />o <br /> <br />8 <br /> <br />10 <br /> <br />12 <br /> <br />14 16 18 20 22 24 (Houra) <br /> <br />2 <br /> <br />3 <br /> <br />DURATION IN MINUTES AND HOURS <br /> <br />RALSTON CREEK <br />West Rainfall <br />(corrected for 48 sq. mi.) <br /> <br />RAIN FALL <br />DEPTH - DURATION - FREQUENCY GRAPHS <br />WRIGHT - McLAUGHLIN ENGINEERS <br />FIGURE HA-] <br />