(A) The preliminary plat shall be accompanied by evidence satisfactory to the Planning Board and Town Council 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 drainage system shall be designed to protect the proposed development and adjacent properties from water damage;
(4) Stormwater design shall follow the most recent edition of NCDENR Division of Water Quality Stormwater Best Management Practices;
(5) Surface drainage courses shall have side slopes, where feasible, or at least two feet of horizontal distance for each one foot of vertical distance (two:one). Courses should be of sufficient size to accommodate the drainage area and be designed to comply with the standards and specifications for erosion control as required by the State Sedimentation Pollution Control Act, G.S. Ch. 113k, Art. 4, § 143-34.12, and the State Administration Code Title 15, Chapter 4, and any locally adopted erosion and sedimentation control ordinance;
(6) 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;
(7) 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, G.S. Ch. 113A, Art. 4, and the State Administrative Code Title 15, Chapter 4, and any locally adopted erosion and sedimentation control ordinances; and
(8) Any dam constructed within a subdivision which is greater than 15 feet in height (measured from the lowest point on downstream top of the dam to the highest point on the fill) and is also greater than ten acre-feet in area (measured from the top of the dam) shall comply with the State Dam Safety Law of 1967, being G.S. §§ 143-215.23 et seq., and the State Administrative Code Title 15, Subchapter 2K.
(Ord. passed 5-17-2007)