A. All pipes shall be laid in alleys or easements whenever possible, or at locations generally on the south and west sides of streets and alleys as directed by the Water Commissioner. Pipes shall have a lateral clearance of not less than three feet (3') from water mains and twelve inches (12") from any other subsurface structure; provided, that under exceptional circumstances the Water Commissioner may authorize less clearance. Pipes shall have a vertical clearance of twelve inches (12") when crossing another pipe. Pipes shall be laid with a cover not less than thirty inches (30"), except under unusual circumstances the Water Commissioner may authorize less coverage. Where the trench is in rock the cover may be twenty four inches (24") if the pipe is properly cushioned as required in section 13.16.100 of this chapter.
B. In the event interference with other subsurface structures make it impractical to maintain the above depths, the Water Commissioner may permit gas pipelines and pipe mains to be constructed so as to avoid such subsurface structures. No person shall install a gas service line on consumer's premises, in the same ditch as the water service line without written permission from the Water Commissioner. (Ord. 157 § 300, 1961)