When a storm sewer system outfalls into a floodplain of any major watercourse, the outfall should not be subject to frequent floods or backwaters to the maximum extent practicable. Standard headwalls and/or headwalls with wingwalls shall be constructed for all outfalls and include rock channel protection and aprons as erosion control as required. Suitable baffles or other energy dissipaters shall be provided if necessary to prevent erosion. The invert of the first storm sewer appurtenance upstream of the outfall structure should be above the elevation of the calculated 100-year floodplain at the receiving body if practicable.
(Ord. 012-118, passed 10-8-2012)