(A) No lot shall be built upon, graded or filled without the Building Official’s or Zoning Administrator’s prior approval of a stormwater management plan. The stormwater management plan and construction specifications must be stamped and signed by a professional engineer or landscape architect actively licensed in the state. All stormwater plans must include a scaled site plan and survey illustrating all existing and proposed topographical features of the lot, existing and proposed drainage flow patterns, with a site narrative describing the means and methods of preventing adverse impacts to adjacent and/or downstream properties. The following site changes shall require the submittal of a stormwater management plan:
(1) Any new building construction, new impervious surface, or replacement of impervious surfaces, which cumulatively exceed 625 square feet in area (All development shall be cumulative over time when considering the square footage threshold for requiring a stormwater management plan); and
(2) Adding fill or re-contouring of 20% or more of the existing lot area in accordance with Section 21-13.
(B) Additional submittal materials, design specifications and maintenance schedules may be requested at the discretion of the Building Official and/or Zoning Administrator to ensure compliance with the County Stormwater Management Program.
(Ord. 2016-06, passed 9-20-2016)