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Public‑works briefing: 'trip wall' at Magnolia Landing aims to alter FEMA wave limits to permit traditional road standards
Summary
City staff described a specialized coastal 'trip wall' at Magnolia Landing intended to change FEMA flood‑map wave behavior so roads and buildings can be constructed to more typical standards; council approved related agreements and an ordinance as amended.
CHARLESTON — At the Nov. 18 meeting, city public‑works staff briefed council on a unique engineering solution at Magnolia Landing: a coastal 'trip wall' designed to reduce wave impacts behind a protective structure so that roads and some buildings can be constructed without pile foundations in areas otherwise designated as limits of moderate wave action.
Public‑works presenter Mr. Bucci explained that much of the project area falls within FEMA's limits of moderate wave action, where strict building requirements typically prohibit structural fill and require pile or pier foundations and breakaway walls. "This is a trip wall, which will trip the waves and prevent those waves from damaging what is behind it," Bucci said, adding the approach would allow less‑restrictive roadway and building standards in the protected area. He said the measure responds to site‑specific conditions and is intended to reduce construction risk while enabling project delivery.
Council thanked staff for the presentation, accepted related committee recommendations, and approved agreements and the associated ordinance as amended in the meeting's committee action. Staff said permitting and design work for the project is underway.
