§ 22-109. Stormwater drainage system.

The subdivider shall provide a surface water drainage system constructed to the standards of the North Carolina Department of Transportation, as reflected in "Handbook for the Design of Highway Surface Drainage Structures," 1975, as amended or revised, subject to review by the county and NCDOT where applicable.

(a)

No surface water shall be channeled or directed into a sanitary sewer.

(b)

Where feasible, the subdivider shall connect to an existing storm drainage system.

(c)

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.

(d)

Surface drainage courses shall have side slopes of at least three (3) feet of horizontal distance for each one (1) 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 of the North Carolina Sedimentation Pollution Control Act of 1973, G.S. Ch. 113A, Art. 4, and the Rowan County Sedimentation Control Ordinance. Other side slope standards can be accepted by the subdivision administrator, if approved by North Carolina Department of Transportation or Rowan County Planning and Development.

(e)

The minimum grade along the bottom of a surface drainage course shall be a vertical fall of at least one (1) foot in each two hundred (200) feet of horizontal distance.

(f)

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 land disturbing activity in accordance with the Rowan County Sedimentation Pollution Control Ordinance and North Carolina Sedimentation Pollution Control Act of 1973, G.S. Ch. 113A, Art. 4.

(g)

Anyone constructing a dam or impoundment within the subdivision shall comply with the North Carolina Dam Safety Law of 1967 and the North Carolina Administrative Code Title 15, Subchapter 2 K, if applicable.

(h)

In areas of special flood hazards, all subdivision proposals shall have adequate drainage provided to reduce exposure to flood damage and shall comply with all requirements of the Rowan County Flood Damage Prevention Ordinance, if applicable for the subdivision.

(Amend. of 11-2-09)