(A) (1) The stormwater permit application and plan shall refer to the drawings and technical documentation for planned site improvements necessary to fulfill the drainage and stormwater management requirements of this chapter.
(2) This shall include, but not be limited to:
(a) Location and topographic maps with the total drainage area delineated, including both on-site and off-site areas and sufficient information to define all ridges, existing streams, location of the 100-year floodplain and floodway, drainage ways, wetland areas, existing springs, and elevation of any proposed discharge point, and any additional information required to evaluate the existing and proposed drainage system, which may include a soil analysis;
(b) Architectural and engineering drawings showing plan, profile and details of piping, drainage structures, swales, and channels tying into a network of pre-existing human-made or natural channels;
(c) Written project specifications governing work performance and materials;
(d) Computations and assumptions sufficient to support the design of piping, drainage structures, retention/detention ponds, and permanent erosion control measures; and
(e) Whatever other narrative statements necessary to adequately describe the proposed site improvements and the measures planned to comply with the requirements of this chapter.
(B) The stormwater permit application and plan shall be prepared by and shall bear the seal and signature of a professional engineer or landscape architect licensed in the state, competent to perform all aspects of design.
(C) The stormwater permit application and plan shall be prepared to meet the basic objectives and design standards for drainage and stormwater management as described in this chapter.
(D) The stormwater permit application and plan shall show the existing site topography and proposed site drainage improvements in sufficient detail to facilitate plan review and construction. The plan drawings shall be presented at a scale no smaller than one inch equals 50 feet.
(2013 Code, § 20-8)