(A) Minimum requirements. All proposed new development shall be reviewed to determine that:
(1) Such proposals are consistent with the need to minimize flood damage and will be reasonably safe from flooding;
(2) All public utilities and facilities such as sewer, gas, electric, communications, and water systems are located and constructed to minimize or eliminate flood damage; and
(3) Adequate drainage is provided to reduce exposure to flood hazards; in Zones AH and AO, adequate drainage paths shall be provided to guide floodwaters around and away from proposed structures.
(B) Sanitary sewage facilities. All new and replacement sanitary sewage facilities, private sewage treatment plants (including all pumping stations and collector systems), and on-site waste disposal systems shall be designed in accordance with the standards for onsite sewage treatment and disposal systems in Chapter 64E-6, F.A.C. and ASCE 24 Chapter 7 to minimize or eliminate infiltration of floodwaters into the facilities and discharge from the facilities into flood waters, and impairment of the facilities and systems.
(C) Water supply facilities. All new and replacement water supply facilities shall be designed in accordance with the water well construction standards in Chapter 62-532.500, F.A.C. and ASCE 24 Chapter 7 to minimize or eliminate infiltration of floodwaters into the systems.
(D) Limitations on placement of fill. Subject to the limitations of the Floodplain Regulations, fill shall be designed to be stable under conditions of flooding including rapid rise and rapid drawdown of floodwaters, prolonged inundation, and protection against flood-related erosion and scour. In addition to these requirements, if intended to support buildings and structures (Zone A only), fill shall comply with the requirements of the Florida Building Code.
(E) Limitations on sites in coastal high hazard areas (Zone V). In coastal high hazard areas, alteration of sand dunes and mangrove stands shall be permitted only if such alteration is approved by the Florida Department of Environmental Protection and only if the engineering analysis required by § 152.25(B) of the Floodplain Regulations demonstrates that the proposed alteration will not increase the potential for flood damage. Construction or restoration of dunes under or around elevated buildings and structures shall comply with § 152.35(E)(3)) of the Floodplain Regulations.
(F) Single family and duplex residential stormwater management performance standards.
(1) Applicability. The standards of this subsection shall apply to new construction or substantial improvements to single family and duplex residential projects that are utilizing fill and have a lot area under one acre in size.
(2) Stormwater management plan required. To implement the requirements herein, a stormwater management plan and site drainage calculations shall be prepared by a Professional Engineer (P.E.) licensed by the State of Florida that demonstrates that the on-site drainage facilities provide at least the minimum retention storage volume of one-inch times the total area of the parcel. The stormwater runoff water shall be diverted to a stormwater conveyance other than the city's stormwater management system per § 53.13(A)(1). The site shall be graded in a manner to drain storm water runoff away from foundations.
(3) For single family parcels and duplex parcels, the site must retain the volume of stormwater runoff that equates to one-inch times the total area of the parcel. Retention must be adequate to ensure the inch of retention with:
(a) No runoff from front yard area to the street or adjacent property.
(b) No runoff from side yard areas to adjacent properties.
(c) No runoff from backyard area to adjacent properties, Intracoastal Waterway, or adjacent canal.
(d) No runoff into the right-of-way or street from driveways.
(4) Maintenance of privately owned stormwater management systems.
(a) Should the privately owned stormwater management system fail to function as designed and intended, the owner or maintenance entity shall take appropriate corrective measures to restore and ensure proper operation of the system.
(b) Inspections may be performed by city officials when reasonably necessary to carry out the purposes of this section.
(c) This section may be enforced by any means legally available to the city.
(Ord. 2014-41, passed 5-27-14; Am. Ord. 2015-78, passed 9-8-15; Am. Ord. 2024-45, passed 7-23-24)