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Dewberry presents Amite River Basin master plan draft; warns of higher 2050 flood risks and recommends remapping and freeboard standards
Summary
Dewberry told the ARBC that modeling to 2050 projects increased sedimentation and higher flood elevations that could place thousands more structures in the floodplain; the consultant recommended higher freeboard, FEMA map updates using LWI data, and Community Rating System steps to lower insurance costs.
Consultant Sam Kampton of Dewberry told the Amite River Basin Drainage and Water Conservation District on Dec. 10 that its draft master plan models to 2050 show substantial sedimentation and flood‑risk increases if no action is taken.
Kampton said simulations project 1–7 feet of additional sediment adjacent to the weir and estimated about $777 million in additional 100‑year flood losses by 2050 in today’s dollars. He said the scenario would place nearly 8,000 additional structures into the floodplain unless…
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