(A) Detention ponds shall be designed and sized to safely pass the 10-year design storm through a principal spillway without overtopping the pond's emergency spillway.
(B) The principal spillway pipe shall have a minimum diameter of 24 inches.
(C) Detention ponds shall be designed with a hardened (lined) emergency overflow spillway whose invert is placed at or above the pond's 10-year water surface elevation.
(D) The emergency spillway shall be designed to safely pass the 100-year storm event with a minimum of 1 foot of freeboard, assuming the principal spillway is completely blocked.
(E) Detention ponds shall include Best Management Practices (BLIPS) to contain floatables and other debris.
(Ord. 77, passed 1-5-2005)