§ 93-12. Drainage.

A. 

Removal of spring and surface water. The subdivider may be required by the Planning Board to carry away, by pipe or open ditch, any spring or surface water that may exist either previous to or as a result of the subdivision. Such drainage facilities shall be located in the street rights-of-way, where feasible, or in perpetual unobstructed easements of appropriate width.

B. 

Drainage structure to accommodate potential development upstream. A culvert or other drainage facility shall, in each case, be large enough to accommodate potential runoff from its entire upstream drainage area, whether inside or outside the subdivision. The Department of Public Works of the County of Nassau will approve the design and size of such facility.

C. 

Responsibility for drainage downstream. The subdivider's engineer shall also study the effect of each subdivision on existing downstream drainage facilities outside the area of the subdivision. This study shall be reviewed by the Department of Public Works of the County of Nassau. Where it is anticipated that the additional runoff incident to the development of the subdivision will overload an existing downstream drainage facility, the Planning Board shall not approve the subdivision until provisions have been made for the improvement of said condition as approved by the Nassau County Department of Public Works.

D. 

Installation and maintenance of facilities. The subdivider will be required to install the facilities for the drainage of streets as required by the Commissioner of Public Works of Nassau County, and other drainage facilities required to be installed on the plat shall be constructed and completed prior to the installation of any other improvements required on the plat. All such drainage structures shall be maintained in good operating condition until such time as the land is released.

E. 

Dedication of land for storage basins and required easements to Nassau County. Land for storage basins and easements shall be dedicated to Nassau County. Dedication papers referring to such property to be dedicated to the county will be prepared by the County Attorney and forwarded to the subdivider for execution. The execution of these papers by the subdivider will not necessarily constitute an acceptance of dedication by the county. Release of bond will not be effected before acceptance of dedicated property by the county.

F. 

Fencing of storage basins. All storage basins shall be fenced prior to excavation. All fencing shall be constructed in accordance with the requirements of the Nassau County Department of Public Works, which requirements and specifications are made part of these requirements and specifications.