§ 30-278. Disposition of runoff.

(a)

All development will be required to treat the required volume of runoff in accordance with section 30-277(c) for pollution abatement purposes. Additionally, Categories 2 and 3 will be required to limit the rate of discharge from the developed site to the rate of discharge emanating from the site prior to development based upon a twenty-five-year frequency storm event. When pollution abatement volumes and detention volumes to reduce the peak rate of discharge are incorporated into one (1) facility, the volume of water impounded to reduce peak discharges in excess of the pollution abatement volume must be evacuated by a positive, nonfiltering system unless otherwise approved by the county engineer.

(b)

Off-site easements for stormwater management facilities will be required when either of the following conditions exist:

(1)

The discharge is into any manmade facility for which the county does not have either a drainage easement or right-of-way.

(2)

The discharge is into a natural system such that the rate or character (i.e., sheet flow vs. concentrated flow) of the flow at the property line has been changed. The easement will be required to a point at which natural conditions are duplicated.

(c)

Special engineering features to minimize the transport of floating debris, oil, and grease remaining in the detention volumes to reduce peak discharges will be incorporated into the design of the outlet control structure. The design of this control system will make adequate provision to minimize erosion.

(Code 1965, § 32-66(c); Ord. No. 86-20, § 1(c), 8-25-86)