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� <br /> ��' �it�&�rc�,�nc.� <br /> land use consultants _ <br /> PINE A�JD PACIFIC RESTAURANT DRAINAGE STUDY <br /> I , PEAK RUNOFF RATE FOR 10-YEPR STORM <br /> RATIUNAL METHOD Q = CIA C = Runoff Coefficie�t � <br /> I - Rainfall Intensity ., <br /> A c Acres� Area �' <br /> m <br /> T = Time of Concentratio� " <br /> c <br /> .. .. <br /> -1 T <br /> UNDEVELOPED CONDITIONS <br /> .. � <br /> N 2 <br /> m <br /> A = 1 .06 <br /> c v <br /> m o <br /> C c 0.10 (From Table 1 ) 0 3 <br /> m <br /> I = 1 . 38 (From Chart 1B) m -zi <br /> «, <br /> T� = 10+ 40D = 18 (Velocity from Ghart � ) 'c � <br /> 60 0. 85 �2 <br /> �. <br /> -1 N <br /> q = ( o. io) (i .38) (1 .06) - o. is �r, . '` <br /> o� <br /> T Y <br /> a <br /> -1 m <br /> , _ <br /> m � <br /> II . RUNGFF COEFFICIENT AVERAG[ `� <br /> o r <br /> �m <br /> Cp c O. BS (From Table 1 ) � c�'n <br /> 'm <br /> z � <br /> 1r <br /> • m <br /> a <br /> � <br /> � <br /> x <br /> III . MAXIMUM OUTFLOW PER ACRE IMPERVIOUSNESS (CFS/AC) z <br /> _� <br /> q = Allowable Outflow ..w, � <br /> ° Acreage x Runoff Coet'ficient Cp rrP{�D q�L",ti, `� <br /> " \V�.''t ti,i$�',7���A., O <br /> Q 0. 15 �'.,c, /•��y�c;Oi��:, ... <br /> � 1 . 06 x 0. 85 • '� �', ' m <br /> . ' . e , <br /> 4 j: y..tiu+ .�: Y t <br /> ° �, a :� : <br /> p c 0. 1665 .,� �,.: <br /> �� C P . �* <br /> 0 oJ,s/�NAL ENG� <br /> 2 <br /> 10/27/82 <br /> 617 medicabdental blda / everett.wa 9A201 206/'7.59-2118 <br /> / <br />