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U~~ <br /> Exempt Allowable Allowable Prohibited <br /> with <br /> Mitigation <br />Airport facilities: <br />+ Airport facilities that impact equal to or less than 150 X <br />linear feet or one-third of an acre of riparian buffer <br />• Airport facilities that impact greater than 1501inear feet X <br />or one-third of an acre of riparian buffer <br />Archaeological activities X <br />fridges X <br />Dam maintenance activities X <br />Drainage ditches, roadside ditches and stormwater outfalls <br />through riparian buffers: <br />• Existing drainage ditches, roadside ditches, and X <br />stormwater outfalls provided that they are managed to <br />minimize the sediment, nutrients and other pollution that <br />convey to waterbodies <br /> <br />• New drainage ditches, roadside ditches and stormwater X <br />outfalls provided that a stormwater management facility is <br />installed to control nitrogen and attenuate flow before the <br />conveyance discharges through the riparian buffer <br /> X <br />• New drainage ditches, roadside ditches and stormwater <br />outfalls that do not provide control for nitrogen before <br />discharging through the riparian buffer }{ <br />• Excavation of the streambed in order to bring it to the -" <br />same elevation as the invert of a ditch <br />Drainage of a pond in a natural drainage way provided that X <br />anew riparian buffer that meets the requirements of <br />Section 3.13 and 3.C is established adjacent to the new <br />channel <br />