(A) As part of the preliminary plat, the subdivider shall present a storm water drainage plan for his or her proposed subdivision to the Planning Board for its review and approval.
(B) This plan shall incorporate the following basic design elements.
(1) No surface water shall be channeled or directed into a sanitary sewer.
(2) Where feasible, the subdivider shall connect to an existing storm drainage system.
(3) Where an existing storm drainage system cannot feasibly be extended to the subdivision, a surface drainage system shall be designed to protect the proposed development from water damage as well as other development downstream from the project.
(4) Surface drainage courses shall have side slopes of at least three feet of horizontal distance for each one foot of vertical distance, and courses shall be of sufficient size to accommodate the drainage area without flooding.
(5) The minimum grade along the bottom of a surface drainage course shall be a vertical fall of at least one foot in each 200 feet of horizontal distance.
(6) Stream banks and channels downstream from any land-disturbing activity shall be protected from increased degradation by accelerated erosion caused by increased velocity of runoff from the land disturbing activity in accordance with the State Sedimentation Pollution Control Act, being G.S. Chapter 113A, Article 4, and NCAC Title 15A, Chapter 4.
(7) Anyone constructing a dam or impoundment within the subdivision must comply with the North Carolina Dam Safety Law of 1967, being G.S. §§ 143-215.23 et seq., and the NCAC Title 15A, Subchapter 2K.
(8) In all areas of special flood hazards, all subdivision proposals shall have adequate drainage to reduce exposure to flood damage.
(Ord. passed 1-4-2000)