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Design Storm <br />Peak Storage Time <br />(Minutes) <br />10 YR <br />T = -25 + 2254 <br />Tom <br />25 YR <br />T =-25 + `2706 <br />�/ �o <br />50 YR <br />T =-20 + 2160 <br />N <br />100 YR <br />T =-20 -: 2430 <br />How to use table: <br />Example: Qallow = 0.9 cfs <br />De bign Stcrm = 25 Yr. <br />A = 10 acres <br />Cdev = 0.9 <br />Qo = ( allow) = 0.9 = 0.1 <br />A)(Cdev 10)(.9 <br />T = -25+ 2706 = 139.5 <br />u.l <br />Vs = 4329 (139.5) - 40(0.1)(139.5) _ <br />139.5 + 25 <br />Vs = 3113 cf/acre impervious <br />r46le- z. <br />Maximum Storage Volume (Ft3/AC) <br />Vs = 3607T - 40 QoT <br />T+Iy <br />Vs = 4329T - 40 Qo T <br />VS = 4329T - 40 QoT <br />T+ 00 <br />Vs = 4860T 40 QoT <br />T--X <br />