No gas pipe or water pipe shall be laid in the same trench with the sewer pipe in any street, alley or public grounds in the city or nearer than three feet to any sewer pipe. No underground electric line shall be laid in the same trench with any gas pipe, water pipe or sewer pipe in any street, alley or public grounds in the city nor nearer than three feet to any such pipes or conduits.
(1964 Code, § 19-48)