§ 6.06.105. Side drains (driveway culverts).

1.

Minimum pipe size: Unless otherwise approved by the county engineer, the minimum allowable pipe diameter for side drains shall be 15 inches or the equivalent section for arch or elliptical pipe.

2.

Schedule of side drains: All construction drawings submitted for review shall include a schedule showing the size, and type of the side drain needed to provide any indicated access.

3.

End treatments: Side drains shall be installed with county approved end treatments. Permissible end treatments shall include mitered ends, headwalls and "U" type mitered end walls. Headwalls shall be placed outside of the roadway clear zone only if restrictions exist preventing installation of mitered end sections.

4.

Minimum pipe cover: Unless otherwise approved, minimum pipe cover shall be 12 inches measured from the outside top of pipe to the top of the base at any point in the driveway cross-section.

5.

Pipe length including shoulder for side drains shall be based upon the following:

Driveway Type	Maximum Pipe Length*	Minimum Pipe Length*
Residential Driveways	Driveway Width PLUS 4 feet each side	Driveway Width PLUS 2 feet each side
Non-Residential Driveways	Driveway Width PLUS 8 feet each side	Driveway Width PLUS 4 feet each side

 

* Pipe length does not include the length of end treatment.

(Ord. No. 11-01, § 2, 1-18-11)