(A) Stormwater runoff from the development shall be transported from the development by vegetated conveyances to the maximum extent practicable.
(B) All built-upon area shall be at a minimum of 30 feet landward of all perennial and intermittent surface waters.
(C) Post-development runoff rate shall not exceed pre-development runoff rate. Runoff rates must be based on the same calculation method.
(D) Stormwater management facilities shall have a minimum design capacity of the 10-year discharge.
(E) Sormmwater management facilities shall be designed in accordance with 15A NCAC 2H.1008.
(F) Storm water management facilities shall be permanent, shall be protected with easements or covenants that run with the land, and shall be provided with public access.
(G) Projects that drain to Class Tr water shall include stormwater management measures that do not result in a sustained increase in water temperature of the receiving stream.
(H) Minimum pipe diameter shall be 18 inches for open-ended culverts and 15 inches for closed systems and driveway culverts. Minimum pipe diameter for portions of closed systems outside the public right-of-way shall be 12 inches.
(Ord. passed 5-5-2015)