Dredging Alternatives- (Ralph Rohena) — 6A - Dredging Alternatives - Member Rohena — Waterways Advisory Committee (2026-05-21)

AI Summary

This technical briefing document discusses dredging alternatives for removing contaminated organic sediments (muck) from Florida waterways, particularly the Indian River Lagoon. It describes advanced geophysical survey methods that use 4D modeling to pinpoint contaminated sediment locations and thickness, enabling surgical excavation that reduces unnecessary dredging, lowers costs, and minimizes disposal needs. The document also covers hydraulic dredging shroud technology and a potential cost-saving approach using deep areas near dredging sites for spoil encapsulation, which could restore sunlight penetration for seagrass growth in previously dead zones.