Laserfiche WebLink
SUMMARY <br />Four possibilities investigated: <br />1. Storage requirement for the 100 year 24 hour event for the <br />whole area of 27.7 acre. <br />2. 100 year 24 hour event storage requirement for the commercial <br />area only of 9.0 acre. <br />3. 10 year 24 hour storage requirement for the whole area. <br />4. 10 year 24 hour storage requirement for the commercial <br />area only. <br />RESULT <br />100 year 24 hour event Required Storage <br />Commercial & Residential = 27.7 Acre 3.0 Ac /ft <br />Commercial only = 9.0 Acre 1.15 Ac /ft <br />10 year 24 hour event Required Storage <br />Commercial & Residential = 27.7 Acre <br />Commercial only = 9.0 Acre <br />Available Area <br />To the East . . . . 0.25 Acre <br />To the West . . . . 0.18 Acre <br />2.18 Ac /ft <br />0.89 Ac/ft <br />Detention Pond for Area "A" Sec 5 Industrial Park <br />I. Ponding for the whole of Area A <br />Proposed pond will have a storage for the difference in runoff between <br />the 100 year 24 hour developed runoff and the undeveloped rate of runoff. <br />Predevelopment Rate of Runoff: <br />Total Area 27.70 <br />Runoff length: 1000' <br />Arg Slope: 0.013 ft /ft <br />N = 0.4 <br />Tc = 35 min <br />Intesity for the 100 year event: <br />1100 = 4.2 in /hr <br />C = 0.3 <br />Q = ICA - 4.2 (0.3) (27.70) <br />Qout = 34.91 CFS <br />= 69.3 Ac /ft 1 day <br />Page 26- <br />