Agenda - 11-14-2017 - Agenda - Laserfiche WebLink

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Article 6: Development StandInas Section 6.13: Stream Buffers .2 Applicability Th- earn buffer regulations and standards contained herein shall be applica• - o all streams and wate :.tures, as follows: (A) Streams ide • .ed by any of the following means: (1) Shown as so is - e lines or as broke, . ue lines on the USGS Quadrangle maps, (2) Shown as water featu - • the • :••e County Soil Survey, or (3) A water feat - dentified by a field deter • - ion of County staff trained in surfac- -.ter identification through the North Ca • *•a Division of Water Quality owQ). (B) . -am buffers shall extend around the perimeter of all water features if an :• ion of the stream buffer of a stream touches the water feature. Disputes pertaining to wate :.ture decisions by County staff shall be filed directly to the NCDWQ. 6.13.3 Calculating Width of Stream Buffer (A) Special Flood Hazard Areas = - e - - _ _ _ _ _ (1) Those streams identified by FEMA as having floodplains shall have stream buffers calculated from the outside edges of the 100-year floodplain. B) Calculating Slope Value Draw 250' length perpendicular lines, at 200-foot horizontal interv. . . ong the -ntire length of the outside edges of the stream, or the outer -.•e of the FEMA floo•: .in, whichever is greater. (2) Determine th- : -vation at either the stream •- or the outer edge of the FEMA floodplain, whicheve •- highest (Eleva 1), and at the point 250' from the stream or FEMA floodplain, is -ler is applicable, along the perpendicular line (Elevation 2). (3) Subtract Elevatio rom Elevation 2 for t - •.fference. (4) Divide th- % erence by 250 for the Mean. (5) ' . iply the Mean by 100 to determine the "Slope Value". Perform this calculation for both sides of the stream or floodplain. Orange County, North Carolina-Unified Development Ordinance Page 6-96