Orange County NC Website
Browse       Search
Run -off from roads, parking lots, and /or sidewalks shall be directed to <br />undisturbed areas through use of berms, grassed diversion ditches or <br />swales, or other acceptable means to reduce run -off velocity and filter <br />out pollutants. <br />b) Structural Measures <br />Non - structural methods may not adequately control the first inch of <br />stormwater runoff due to the amount of impervious surface proposed to <br />be developed, and other factors such as soil type, slope, presence of <br />floodplains and erodible soils, and /or lack of vegetative cover. In such <br />cases, structural detention ponds, which capture stormwater for slow <br />release through an outlet, are required. Where required, detention <br />ponds shall be constructed in accordance with Appendix A. <br />c) Impervious Surface and Detention Pond Requirements <br />For all protected watersheds, there is a absolute limit on the percentage <br />of I of a rea w hich c an b e c overed w ith i mpervious s urfaces. I n s ome <br />cases, detention ponds are required when the proposed impervious <br />surface ratio exceeds a specified percentage, which is below the <br />absolute limit. <br />Impervious surface and detention pond requirements are as follows: <br />6 -29 <br />