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Design Sto'rm <br />!0 YR <br />25 YR <br />50 YR <br />Tab�e 2 <br />Peak Storage Time <br />(Minutes) <br />, . _-_-��. <br />„ T =�i5 + 2� <br />0 <br />T-20+ 2� <br />0 <br />!00 YR T = 20 + 2430 <br />Qo <br />How to use table: <br />Example: Qallow = 0.9 cfs <br />Design Storm = 25 Yr. <br />A = 10 acres <br />Cdev = 0.9 <br />Qo = ( allow) = 0.9 = 0.1 <br />A CdeV l0..9) <br />T = -25+ 706 = 139.5 <br />0.1 <br />YS = 4329 (139.5) - 40(0.1)(139.5) = <br />. . 139.5 + 25 <br />' VS = 3113 cf/acre impervious <br />, Maximum Storage Volume (Ft3/AC) <br />V = 3607T - 40 QoT <br />5 .�- <br />VS = 4329T - 40 Qo T <br />�� <br />VS = 4329T - 40 QoT <br />T+20 <br />V = 4860T - 40 QoT <br />s �� <br />