§ 82-187. Drainage.

(a)

All drainage pipe and drainage structures shall be designed utilizing sound hydrology standards and requirements set forth in chapter 70, article II, by a registered professional qualified to design such systems and who is licensed in the state. Water shall be diverted under roadways by the use of pipe with a minimum diameter of 15 inches. Minimum material type is 14 gauge corrugated metal pipe. Reinforced concrete pipe is acceptable. High Density Polyethylene (HDPE) and Polyvinyl Chloride (PVC) culverts are acceptable so long as the selected product and installation thereof follow the Georgia Department of Transportation Standard No. 1030P, and QPL-51. It shall be the responsibility of the developer and/or contractor to coordinate the installation and inspection of any HDPE or PVC pipes to the satisfaction of the Gilmer County Department of Public Works prior to covering said pipes. Any other types of plastic culverts are not acceptable. Any culvert in a road that is to be dedicated to Gilmer County which will have more that eight foot of cover must be reinforced concrete

(b)

The top of the pipe shall be placed with sufficient cover to assure structural integrity of the pipe for anticipated design loads as recommended by the pipe manufacturer. Plastic pipe is not acceptable. The backfill material shall be clean and solidly tamped about the pipe. The discharge end of the crossdrain shall be stabilized using riprap rock for a distance of eight times the diameter of the pipe. Minimal width drainage easements shall be provided in compliance with OSHA safety standards and requirements of chapter 70, article II. Such drainage easements shall be shown on both the preliminary plat and final plat.

(Ord. of 3-27-2003(5), § 3.515; Res. No. 06-47, 3-8-2006; Res. No. 06-124, 6-27-2006; Res. No. 10-006, 1-28-2010)