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APR 17 '89 15:03 CUrtr��1�1G5 ASSOC 899 P06 <br /> � . . . • <br /> 6stimated Byyass Flor; <br /> *pproximete Road �rea � ' � � peret . <br /> � 688 �tB�: <br /> , Time ot concentration, Byp <br /> Pavemant !00 L�, Velocity ■ 1.5 TPt� <br /> Pipe 65 LF, I�seume 1 ipS Min. <br /> ' Channel 160 LF, Velocity � 2 FPS <br /> , + 6 + 0 <br /> T� 5+ (60) 12.51 (601�,f2) (6���1 . <br /> q� + 9.54 Minutee <br /> I�o�r = 1.9 inches/hour <br /> 1lseume e pen�ment runolt cositicient <br /> � C ■ 0.90 <br /> Q = CIA � (0.901 (1.91 (0•Y61 • 0.44 CTS <br /> Qn�r..s • o.�� ere . . . . ::.'� . " <br /> Q�ti�na � 1.19 - 0.44 � 0.95 CFS <br /> � <br /> U�e Four oritice6: ' <br /> ; (Q.�. �ool �41 = 0.1A75 C!'6 � <br /> � p � 0.62 a � D = 1 4a 1/ 112) <br /> 'fi` <br /> � <br /> N = Ne�d � <br /> . , Q ■ Releaae Rate li <br /> a � 11rea ot Overtlow � <br /> D ■ Diameter <br /> OVERFLOY ELEV. Q SIZING 11RER, SF DII�METER, <br /> ELEV, <br /> OC1L1C• I H� = 89.60 - 8�•� � 5.90 Q=0 1875 �t ■ 0.0155� Dt = 1.69"� 1 5/8 + <br /> H7 � 89.60 - 85.60 = 4.0 Q■0.:�'� a: � 0.0188, Dt � 1.86", 1 7/8 + <br /> Orifice II c0.1875 ao = 0�0218, Da • 1.96", 1 l/B + <br /> Oritice III N� • 89.60 - 86.60 � 3.0 Q��,1875 e� ■ 0.0266, D� � 2.21". 2 1/4 + <br /> Oritiee TV H� = 89.60 - 87.70 ■ 2.� Q <br /> . - <br /> 1 / <br /> . �r �l <br /> � ( _ _ _._ '__- ' .-_ -._ . . - � ' . i,/ �. . <br /> � ��oh . . '� '`r�:y . r- <br /> � , <br /> �c _ '��� ��' _ � , <br /> -,�_ <br /> I <br />