§ 1174. Cross drain pipes.

(a)

Cross drain pipes shall be no less than 15 inches in size when under the street. No storm drain pipe running parallel to the existing primary road shall be located beneath the proposed acceleration/deceleration lanes. The county may modify or waive this requirement if unusual circumstances exist such as topography.

(b)

The inlet and outlet end of all storm drain pipes (including driveway pipe) shall have either flared-end sections or rectangular concrete headwalls that meet the standards of Georgia Department of Transportation 1120 or 1125.

(c)

Extend 20 feet past the rear of the building for storm drains 36 inches or smaller.

(d)

Extend 20 feet past the rear of the building for storm drains larger than 36 inches and size the drainage ditch on each end of the pipe to limit the runoff velocity to less than five fps or riprap the ditch.

(e)

Maximum continuous length of pipe shall be 300 feet for pipes less than 42 inches.

(f)

Junction boxes having access to the pipe shall be constructed to meet the requirements of State Standard 1030D (or most current).

(Ord. No. 17-003 , § 1, 10-2-2017)