The purpose of this chapter is to eliminate the transportation or movement of excess storm water and reduce the damage to property and injury to persons occasioned thereby. Further, it is intended to require that each development shall provide for the on-site or off-site detention of excess storm water runoff resulting from that development. For the purpose of this chapter, “excessive storm water runoff” shall include all increases in storm water resulting from: an increase in the impervious surface of the site, including all additions of buildings, roads and parking lots; changes in soil absorption caused by compaction during development; modifications in contours, including the filling or draining of small depressional areas, alterations of drainageways, or regrading of slopes; destruction of forest, alteration of drainageways or installation of collection systems to intercept street flows or to replace swales or other drainageways; or, the alteration of subsurface flows, including any groundwater dewatering or diversion practices such as curtain drains, compared with the site in its natural state.
('69 Code, § 5-18(b)(1)) (Ord. O-83-1, passed 5-9-83)