A. New development.
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 sites in regulatory floodways.
No development, including but not limited to site improvements, and land disturbing activity involving fill or regrading, shall be authorized in the regulatory floodway unless the floodway encroachment analysis required in Section 4.05.04, subparagraph C.1. demonstrates that the proposed development or land disturbing activity will not result in any increase in the base flood elevation.
E. Limitations on placement of fill.
Subject to the limitations of this chapter:
1. 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.
2. If intended to support buildings and structures (Zone A/AE only), fill shall comply with the requirements of the Florida Building Code.
3. Compensatory storage (excavation) shall be provided based on a volume for volume basis when fill is placed in flood hazard areas landward of the coastal construction control line, including two-tenths of one percent (0.2%) (500-year) flood hazard areas (shaded Zone X), above the normal high groundwater table elevation and below the base flood elevation. The first twelve (12) inches of fill placed above the historic, natural elevation of the parcel is exempt from this requirement. In addition, the fill contained within a stem wall foundation built in compliance with the Florida Building Code is exempt from this requirement. The Floodplain Administrator may reduce or waive the compensatory fill requirement based on site specific conditions and local drainage that demonstrate that the development will have no more than a minimal effect on floodwater storage and will not divert floodwaters onto adjacent property.
F. 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 Section 4.05.04, subparagraph C.4. 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 Section 4.05.14, subparagraph H.3.
(Ord. 719, passed 5-28-2019; Ord. 757, passed 12-18-2020)