Certain counties may erect sea walls and issue bonds.

Miss. Code Ann. § 65-33-1
in effect
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When any public road, street or highway shall extend along the beach or shore of any body of tidewater, and such road, street, or highway, or any part thereof shall be exposed or subject to, or in danger of, damage by water driven against the shore by storms, the boards of supervisors shall have the power, and it is hereby made their duty, to erect and maintain all necessary seawalls, breakwaters, bulkheads, shore stabilization structures, causeways, bridges, breakwaters, or other necessary structures or improvements connecting the beach or shore of any such bodies of water with islands or other land areas located offshore or connecting therewith, pumped-in sand or earth fills, sloping beaches, topping, road surfacing, road protection pavements, aprons, or other necessary devices to protect and preserve such roads, streets, and highways, or to increase the strength or stability of any existing road protection structures by hard surface aprons or other road protection devices or structures, and for that purpose and for the purpose of constructing or improving such highway, may issue the bonds of the county therefor.

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