Orange County NC Website
Orange County SE & SC Ordinance October 23 2007 <br />3. Intermittent streams flowing directly into water supply reservoirs within <br />University Lake, Cane Creek, and Upper Eno Watersheds. Measure along <br />a line running perpendicular to the centerline of the intermittent stream <br />one hundred feet from such stream centerline. <br />4. Intermittent streams flowing into streams which flow directly into water <br />supply reservoirs within University Lake, Cane Creek, and Upper Eno <br />Watersheds. Measure along a line running perpendicular to the centerline <br />of the intermittent stream fifty feet from such stream centerlines. <br />5. Water supply reservoirs within University Lake, Cane Creek, and Upper <br />Eno Watersheds. Measure along a line running perpendicular to the high <br />water mark or floodplain boundary (whichever is farther from the Lake) <br />one hundred feet from such high water mark or floodplain boundary <br />(whichever is farther from the Lake) plus an additional distance equal to: <br />4 x slope x 100 <br />where "slope" is expressed as a percentage derived by dividing by 100 the <br />rise in elevation between the high water line of the Lake and a point one <br />hundred feet from that point along the above described perpendicular line. <br />The existing natural vegetation in the designated buffer areas shall not be <br />disturbed in any way that would reduce the area's effectiveness in <br />achieving the objectives set forth in this subsection. In addition, buffer <br />areas from which the vegetative cover has been removed shall be planted <br />or otherwise provided with ground cover devices or structures sufficient to <br />allow the buffer area to accomplish the objectives set forth in this <br />subsection. Buffers shall not be used as temporary erosion control devices <br />during construction. <br />Sediment Storage - sediment shall be retained on the site of the development. <br />Detention or Retention Areas - retention and detention ponds may be used to retain and <br />detain the increased and accelerated runoff which the development generates. Water shall <br />be released from detention ponds into watercourses or wetlands at a rate and in a manner <br />approximating the natural flow which would have occurred before development. <br />Retention and detention ponds shall be designed so that they maintain their structural <br />integrity when subject to a 100 -year storm. Detention and retention areas shall be <br />designed so that shorelines are sinuous rather than straight and so that the length of the <br />shoreline is maximized, thus offering more space for the growth of littoral vegetation. The <br />banks of detention and retention areas shall slope at a gentle grade into the water as a <br />safeguard against drowning, personal injury or other accidents, to encourage the growth of <br />vegetation and to allow the alternate flooding and exposure of the areas along the <br />shoreline as water levels periodically rise and fall. <br />m <br />