N.Y. County Law § 844
The board of supervisors of the county of Suffolk may provide for the improvement or reconstruction of beaches or shore front within the county, to repair damage caused by hurricane or storm, and to provide suitable protection to prevent future damage to lands or property by the ocean or other waters, including the filling in and grading necessary for such purpose, and including dredging material from inland waterways and moving earth material on the beaches to fill and close new inlets heretofore or hereafter formed in such beaches by a hurricane or storm; purchasing, filling and placing sand bags, opening up old road beds or constructing new traveling surfaces on the sand to permit traffic along the beaches; transporting workmen, materials and equipment, dredging material to construct new dunes on the beaches by embankment alone, purchasing of material and rental of equipment to construct roadways over new fills or along the beaches; to aid in transportation of materials and equipment; purchasing or renting equipment for clearing debris from navigable waters; constructing dikes, bulkheads, jetties and groins or other similar devices on the beaches and supplying the necessary equipment, materials and labor therefor; constructing barriers filled with brush, wire, snow fence or any other suitable material, extending along the shore, with jetties of the same or similar materials extending offshoreward and supplying the necessary labor, equipment and materials necessary therefor; any and all engineering and supervision in connection with the carrying out of all work covered herein; clearing out roadways to expedite traffic, and may acquire real property or an interest therein for such purpose by purchase, dedication, gift, devise or bequest or by condemnation in the manner provided by law for acquisition of real property for highway or county road purposes.
N.Y. CountyLaw § 844