(A) The preliminary plat shall be accompanied by evidence satisfactory to the Planning Board as to the proposed method of providing for storm water drainage.
(B) It shall be the responsibility of the subdivider to provide a drainage system which is designed to meet the following objectives.
(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 feasibly cannot be extended to the subdivision, a surface drainage system shall be designed to protect the proposed development and adjacent properties from water damage.
(4) Surface drainage courses shall have side slopes, where feasible, of at least two 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, and designed to comply with the standards and specifications for erosion control in G.S. Ch. 113A, Art. 4, and the state’s Administrative Code Title 15, Ch. 4.
(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 G.S. Ch. 113A, Art. 4, and the state’s Administrative Code Title 15, Ch. 4.
(7) Anyone constructing a dam or impoundment within the subdivision must comply with the state’s Dam Safety Law of 1967 being G.S. §§ 143-215.23 et seq., and the state’s Administrative Code Title 15A, Subchapter 2K.
(Prior Code, Ch. 12 Art. IV § 407)