§ 70-770.2. Capacity standards for stormwater management facilities.

(a)

All engineering calculations shall be performed in accordance with the procedures outlined in the current edition of the Virginia Stormwater Management Handbook and VDOT Drainage Manual, and the Virginia Erosion and Sediment Control Handbook.

(b)

The engineering calculations shall demonstrate the safe passage of the 25-year storm and the 100-year storm through the stormwater management facility.

(c)

Where the downstream channel is inadequate to carry the outfall from the detention pond, the 25-year storm shall also be detained to pre-development levels and the discharge from the pond shall be restricted so as to conform to the required erosion and sediment control standards.

(Ord. No. O-09-02, 1-27-2009)

(Ord. No. O-09-02, 1-27-2009)