Margate, FL Environmental Rules: Erosion Control (2026)

Margate handles construction-phase erosion through its Floodplain Management chapter and its Drainage and Waterway chapter, and the operative text is § 17-12. Subsection (5) requires fill to be designed to be stable under conditions of flooding, including rapid rise and rapid drawdown of floodwaters and prolonged inundation, with protection against flood-related erosion and scour. Fill that supports buildings in Zone A must also satisfy the Florida Building Code. Subsection (4) goes further inside a regulatory floodway: no site improvement or land-disturbing activity involving fill or regrading is authorized unless the floodway encroachment analysis required by § 17-5(3)(a) shows the work will not increase the base flood elevation.

The permit file has to show the grading. Under § 17-5(1), site plans for development in a flood hazard area are drawn to scale, signed by a Florida licensed architect or engineer, and show the location, extent, amount and proposed final grades of any filling, grading or excavation. When fill is proposed, the plans also give its amount, type and source, the compaction specifications, the intended purpose of the fill areas, and evidence that the fill areas are the minimum necessary. The floodplain administrator, the director of the Department of Environmental and Engineering Services, can waive submissions that are not needed to judge compliance.

The chapter's stated intent in § 17-1(3)(c) is to manage filling, grading, dredging, mining, paving and excavation that increase potential flood damage or erosion, and § 11-1(a)(3) repeats the goal of controlling filling or grading that increases erosion. For canal work, § 11-14 sets bank stabilization: side slopes no steeper than four horizontal to one vertical above elevation 9.0 mean sea level and no steeper than two to one below it unless rock is encountered, and banks above elevation 4.0 mean sea level stabilized with a stand of perennial grass. No paving and drainage construction is final until that grass is permanently established.