§ 58-547. Definitions.

When used in this division, the following words and terms shall have the meaning set forth in this section, unless other provisions of this division specifically indicate otherwise:

Built-upon area (BUA). That portion of a development project that is covered by impervious or partially impervious surface including, but not limited to, buildings; pavement and gravel areas such as roads, parking lots and paths; and recreation facilities such as tennis courts. "Built-upon area" does not include a wooden slatted deck, the water area of a swimming pool, or pervious or partially pervious paving material to the extent that the paving material absorbs water or allows water to infiltrate through the paving material.

Detention. The temporary storage of stormwater runoff in a stormwater management practice with the goals of controlling peak discharge rates and discharge volume.

Development. Any land-disturbing activity that increases the amount of built upon area or that otherwise decreases the infiltration of precipitation into the soil.

Drainage easement. An area of land dedicated for the purpose of conveying stormwater runoff by means of an open channel or drainage pipe.

Floodplain. The one percent annual chance floodplain as delineated by the North Carolina Floodplain Mapping Program in the Division of Emergency Management.

Freeboard. The elevation difference between the full pond and the crest of the dam embankment. Freeboard protects the bank from wave action and overtopping under high-intensity rainfall.

Impervious area. Surfaces that cannot effectively infiltrate rainfall (e.g., building rooftops, pavement, gravel surfaces, sidewalks, driveways, etc.).

New impervious area. Impervious area created after November 13 ^th , 2014.

Runoff. The excess precipitation from rain or snowfall which flows over the ground.

Stormwater management facility. A physical device designed to alter or reduce stormwater runoff velocity, amount, timing, or other characteristics to approximate the pre-development hydrology on a developed site. "Stormwater management facility" is synonymous with "stormwater control facility", "stormwater management practice", "detention facility", "BMP", and similar terms used in this division.

(Ord. No. O-2014-14, 11-10-2014; Ord. No. O-2015-08, 6-8-2015)