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Commission approves revised South Bismarck flood-control concept, aims to shrink cost and seek additional funding
Summary
Staff presented alternatives to address FEMA floodplain mapping in South Bismarck and recommended a ditch-centric approach that would rely on city ROW, reduce reliance on airport or expressway ponds, and lower estimated costs from roughly $172 million to about $100 million; the commission approved proceeding with design work and grant strategy.
Public Works presented an update on South Bismarck flood-plain mapping, alternatives analysis, and funding. Staff said FEMA's 2024 mapping added roughly 1,000 structures in South Bismarck to the flood plain and reviewed prior concepts (airport pond and Bismarck Expressway conduit) that raised FAA, DOT, and parkland concerns and drove preliminary cost estimates above $172 million.
Staff described a revised concept that maximizes storage within the city's existing South Bismarck Drainage Ditch…
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