(A) It is the responsibility of an applicant to include in the drainage plan sufficient information for the Design Review Board, the Zoning Board and the City Council to evaluate the environmental qualities of the affected area, the potential and predicted impacts of the proposed activity on affected waters, and the effectiveness and acceptability of these measures proposed by the applicant for reducing adverse impacts. The drainage plan shall, when appropriate, contain maps, charts, graphs, tables, photographs, narrative descriptions and explanations, and citations to supporting references. The drainage plans and the calculations documentation shall be professionally presented. Substandard work shall not be accepted.
(B) The drainage plan shall be separated from the construction plan and final plat, shall contain the name, address, and telephone number of the owner/developer. In addition, the legal description of the property shall be provided, and its location with reference to such landmarks as major water bodies, adjoining roads, railroads, subdivisions or towns shall be clearly identified by a map.
(C) The existing environmental hydrologic conditions of the site and of receiving waters and wetlands shall be described and mapped where appropriate, including the following:
(1) The direction, flow rate, and volume of flow of surface water runoff under predevelopment conditions;
(2) The location of areas on the site where surface waters collect and percolate into the ground;
(3) A description of all watercourses, water bodies, and wetlands on or adjacent to the site or into which surface waters flow. Information regarding their water quality and the current water quality classification, if any, given them by the Florida Department of Environmental Regulations shall be included;
(4) Groundwater levels, including seasonal fluctuations, using U.S. Soil Conservation Service (SCS) methodology or other appropriate means;
(5) A description of the topography, soils, vegetation, and location of the floodplain (according to the latest edition of the Flood Insurance Rate Map, FIRM).
(D) Proposed alterations of the site shall be described and mapped where appropriate, including:
(1) Changes in topography;
(2) Areas where vegetation will be cleared or otherwise killed;
(3) Areas that will be covered with an impervious surface and description of the surfacing material;
(4) The size and location of buildings or structures; and
(5) Proposed drainage facilities.
(E) Predicted impacts of the proposed development on existing conditions shall be described and mapped where appropriate, including:
(1) Changes in water quality;
(2) Changes in groundwater levels;
(3) Changes in the extent of flooding on the site and upstream and downstream from it;
(4) Impact on wetlands; and
(5) Impact on vegetation.
(F) All other components of the drainage system that the Public Works Manual requires, and any measures for the detention, retention, or infiltration of water or for the protection of water quality shall be described and mapped where appropriate, including:
(1) The channel, direction, flow rate, volume and quality of stormwater that will be conveyed from the site, with a comparison to predevelopment conditions;
(2) Detention and/or retention areas, including plans for the discharge of contained waters, maintenance plans, and logical predictions of water quality in the detention and/or retention areas. In addition, detention and/or retention areas shall be a separate and reserved area, and shall not be part of the front or back yards. Therefore, subdivisions shall have separate tracts of land dedicated to stormwater detention/retention;
(3) These separate areas of the site shall be used or reserved for percolating water into the ground, including a prediction of the impact on groundwater quality;
(4) A plan for the control of erosion and sedimentation, which specifies in detail the type and location of control measures, the stage of development at which they will be put into place or used and provisions for the maintenance of them;
(5) Any other information which the developer, the Design Review Board, the Zoning Board and the City Council considers necessary for an evaluation of the proposed development.
(G) The data required for submittal are considered the minimum in order for the Department of Public Works to properly evaluate the system and ascertain its impact on existing facilities.
(H) All consultants should review the Public Works Manual for the requirements as it relates to the specific project. A preapplication meeting is not required, but is strongly recommended in order to avoid delays in the approval process.
(Ord. 95-33, passed 8-24-95) Penalty, see § 174.079