2005-031 - Laserfiche WebLink

Home Browse Search

(e) Discharges from the development project shall be conveyed to a point of legal .positive outfall. Tailwater stages of receiving waters must be taken into account in design. Off-site conveyance improvements or enlargement of existing downstream facilities may be required. (f) te-a-permeable dra n A dry detention area shall have an outlet device, and shall not be lower than the elevation of the off-site receiving channel or water body unless protected by a suitably designed flap gate. If the project site is located in a special flood hazard area and direct outfall is to an agency system, the use of a flap gate must be approved by that agency. The bottomelevation of a dry detention or retention system or area used for storage, must be a minimum of one foot (1') above the established wet season water table. • dill la ... .. Section 930.07, Review criteria for all development projects, sections (1)(h); (1)(h)(2); (1)(h)(7)(d); (1)(h)(9); (1)(h)(10); and (1)(h)(11), are amended to read as follows: n)1(h) Disposition of stormwater runoff. The stormwater management system for developments located predominantly on excessively drained soils shall maximize stormwater infiltration. This shall be accomplished through the use of bottomless inlets, perforated pipe, under drains, grading to retard runoff, natural or artificial retention or detention basins, or other methods, depending on the characteristics of the land area. Specific guidelines are as follows: 2. Street drainage shall be by grassed swales, where allowed, or curb and gutter in accordance with county specifications. provided All curb and gutter systems shall discharge or direct water into a central stormwater tract or across a grassed swale area or other filtering medium. 7. Flood routing analysis for all new local road facilities shall show that the water elevation shall at no time during the design storm duration exceed an elevation that would: d. Exceed the elevation of six inches below the finished floor elevation of any structure for the more critical of a .twenty-five year, twenty-four hour (25/24) or a one hundred -year, three-day (100/72) duration storm. zone. 9. All bridges will be designed to--pa-6s with the lowest member above the twenty five-year, twenty four-hour (25/24) and one hundred -year, three-day storm (100/72) events, or as otherwise directed by the governing water body agency. 10. All proposed culverts or structures within all F.S. Chapter 298 Water Control Districts' rights-of-way or easements shall be approved by the applicable water control district or shall be designed according to the 4