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25 <br /> Figure 6.13.13.B: Stream Buffer Slope Value Calculation <br /> 0 <br /> G <br /> OElevation at Stream Bank <br /> Stream <br /> 0 Q O Elevation at FEMA Floodplain Edge <br /> 250'0I 14 250' 0 <br /> C C <br /> C C C Q <br /> 'O m m 0O <br /> 0 200' 0 0 200' <br /> 1 <br /> a � v Stream Q1 w <br /> W W W <br /> i 250' 250' 15 <br /> o v <br /> v <br /> rn w <br /> n <br /> w <br /> Slope Value = � 25 0 � X 100 <br /> (C) Method A—Stream Buffer Based on Slope and Groundcover <br /> (1) The width of the buffer shall be a minimum of 50 feet from each edge of the <br /> floodplain or stream bank. <br /> (2) An additional 15 feet shall be added to the 50-foot buffer(65 feet total)where the <br /> slope value is less than 7.5%, as measured 250 feet from the edge of the <br /> floodplain or stream bank. <br /> (3) For slope values 7.5% and greater, as measured 250 feet from the edge of the <br /> floodplain or stream bank, an additional 30 feet shall be added to the 50-foot <br /> buffer(80 feet total). <br /> (4) These calculations shall be made for both sides of either the stream bank or <br /> floodplain, whichever is greater. <br /> (D) Method B -Stream Buffer Based on Slope and Groundcover <br /> BASEDTABLE 6.13.3.11):STREAm BUFFER WIDTH <br /> ON •• -• - <br /> WOODSTYPE OF GROUNDCOVER <br /> SLOPE VALUE <br /> GRAss(FEET) <br /> 2 to 4.9 100 50 <br /> 5 to 9.9 150 100 <br /> 10 to 14.9 200 100 <br /> 15 or greater 250 150 <br /> [1] In addition to the buffer zone resulting from the calculations below, a stream buffer shall include any <br /> portion of a floodplain as defined in this Ordinance, by special survey by a registered engineer or <br /> surveyor, or by alluvial soils as designated in the Orange County Soils Survey. <br /> [2]The required stream buffer zone shall not be limited to one calculation, but shall be based on <br /> calculations made at points where topographical and ground cover conditions change based on an <br /> analysis of the site. <br /> 6.13.4 Minimum Buffer Widths for Watershed Protection Overlay Districts <br /> (A) University Lake Critical Area (UNIV-CA) <br />