For purposes of this chapter the following definitions shall apply unless the context clearly indicates or requires a different meaning.
DEVELOPMENT. New construction, or expansion, of any site for residential, commercial, industrial, or mixed uses. This includes, but is not limited to, residential subdivisions, planned unit developments, and mixed use subdivisions. This includes, regardless of the number of buildings or separate entities at a site, multi-family residential sites, commercial sites, industrial sites, and trailer parks.
MINOR RUN-OFF POTENTIAL. All proposed construction activities that would result in the conversion of less than 0.25 acres of existing surfaces to less permeable surfaces.
MODERATE RUN-OFF POTENTIAL. All proposed construction activities that would result in the conversion of between 0.25 to 0.40 acres of existing surfacesto less permeable surfaces.
PERMEABILITY. The relative permeability of existing and proposed surfaces shall be based on the following Run-off Coefficients; grass areas C = 0.20, crops C = 0.35, aggregate C = 0.50, pavement C = 0.90, buildings/roofs C = 0.90. Surfaces with lower C values are considered more permeable. Surfaces with higher C values are considered less permeable.
PHASED DEVELOPMENT. New construction, or expansion, in which portions of the work occur at various points in time.
SIGNIFICANT RUN-OFF POTENTIAL. All proposed construction activities that would result in the conversion of 0.40 acres, or more, of existing surfaces to less permeable surfaces.
STORM WATER DETENTION FACILITIES. All wet basins, dry basins, surface storage, underground storage, ditches, swales, and piping designed to convey, store, and discharge storm water at a site.
(Ord. 2011-5341, passed 12-20-2011; Am. Ord. 2019-5423, passed 12-3-2019)