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\ <br /> Design Storm Peak Storage Time Maximum Storage Volume (Ft3/AC) <br /> (Minutes) <br /> l0 YR T = -25 + 2254 VS � 3607T - 40 QoT <br /> � -�o T+�S <br /> 25 YR T =-25 + 2706 VS = 4329T - 40 Qo'r <br /> �o + 5 <br /> SO YR T =-20 + 2160 V = 4329T - 40 QoT - - - ,. - <br /> Qo 5 T+20 <br /> 100 YR T -20 + 2430 VS = 4860T - µ0 QoT =_ ; - _-_ <br /> Qo 'i«3� <br /> How to use table: • _ - ' '. " ' - <br /> .. �. . . . . . :_. _ ._: . _ . <br /> ; '> , k: �_.:.[. _ ::.:•r�v:.:.+�:�:=: <br /> . - 'Kn . . ._ C � � <br /> Example: Qallow = 0.9 cfs " ', ^ = <br /> :n ., �_ - <br /> Design Storm : 25 Yr. '...,-:�:� = - ... _ -_ �.a..�: - - <br /> A = 10 acres -.:. ' - :j---_;�=; ._ <br /> Cdev = 0.9 - , � . _ <br /> Qo = ( allow) = 0.9 - 0.1 • - <br /> A Cdev UO)�.9 <br /> T - -25. 2706 = 139.5 <br /> 0.1 <br /> V = 4329 (139.5) - 40(0.1)(139.5) - <br /> S 139.5 + 25 <br /> �5 = 3I13 cf/acre impervious <br /> r46ie z. <br /> .. � _:.� � :_.,_ _ .. .... _ _ .. .,. _.__ :�::� ----._. _ .... ._ -- <br /> . ...� . _:_ .�.- - <br /> _ . ._ <br /> , ir.k.. . . ._ .. .. � . . <br /> .. ., <br /> �� � : :�. .�. <- .:. .':_ :�:. . ' <br /> , . _ <br /> .. ,r ':. ." ". ti. " .' . .' . ' ___ . _. . _. <br /> . .J` �>: � . .. �. ' F . . _ '. ._ �.�-... _ . .- . � :. . <br /> c . <br /> .�q.. . �.�v�l_. . ` . � .. . . . .� �_ . ..� . , . - .� <br /> ;::tiY`••:� '� :t.,si ....K',P .� �....�c"" ' . . _ . . . . . . . �.. . <br />