(A) If flow attenuation facilities are employed to assist in the control of peak rates of discharge, their effects must be quantified using the SCS Technical Release (TR) 55 Urban Hydrology for Small Watersheds or other approved method. The effects of the flow attenuation facilities on travel time should be reflected in the calculations.
(B) Flow attenuation facilities such as swales and natural depressions should be properly graded to ensure positive drainage and avoid prolonged ponding of water.
(C) Swales shall be properly vegetatively stabilized or otherwise lined to prevent erosion.
(D) Swales shall be designed according to the recommendations contained in the Commonwealth of State Erosion and Sediment Pollution Control Program Manual.
(Ord. 4-2011, passed 10-8-2011)