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An exception shall be allowed for golf courses where the line of <br />play crosses a stream buffer. Only trees which obstruct the <br />intended line of play may be cut, provided stumps and root mass <br />are not removed and trees which are cut can be removed in a <br />sensitive manner which minimizes additional disturbance to the <br />stream buffer. <br />3) New vegetation shall be planted to capture non - source pollutants <br />before they reach the perennial stream, as per applicable <br />Orange County Standards. <br />Amended - <br />s /18101 d) Calculating Width of Stream Buffer <br />Those streams identified by FEMA as having floodplains shall have <br />stream buffers calculated from the outside edges of the floodplain. <br />1) How to Calculate Slope <br />a. Draw 250' length perpendicular lines, at 200- foot horizontal <br />intervals along the entire length of the outside edges of the <br />stream, or the outer edge of the FEMA floodplain, <br />whichever is greater. <br />b. Determine the elevation at either the stream bank itself (1) <br />or the outer edge of the FEMA floodplain, whichever is <br />highest, and at the point 250' from the stream or FEMA <br />floodplain, whichever is applicable, along the perpendicular <br />line (2). <br />c. Subtract (1) from (2). <br />d. Divide c. by 250. <br />e. Multiply d. by 100. <br />f. Perform this calculation for both sides of the stream or <br />floodplain. <br />Hereafter, the number derived in e. will be referred to as "slope value." <br />2) Method A — Stream Buffer Based on Slope and Groundcover <br />The width of the buffer shall be a minimum of fifty (50) feet <br />from each edge of the floodplain. In addition to the fifty (50) <br />foot buffer, an additional 15 feet shall be added to the 50 -foot <br />buffer (65 feet total) where the slope value is less than 7.5 %, as <br />measured 250 feet from the edge of the floodplain. For slope <br />values 7.5% and greater, as measured 250 feet from the edge <br />of the floodplain, an additional 30 feet shall be added to the 50- <br />foot buffer (80 feet total). These calculations shall be made <br />from each side of either the stream bank or floodplain, <br />whichever is greater. <br />R.d1 <br />