Whenever it may be found necessary to pass through or in anywise disturb an existing house drain or private sewer in actual use, such drainage pipe or private sewer shall not be interfered with, nor cut through or connected in any way, without the written consent of the Village Engineer having been previously obtained thereto; nor shall any house drain be carried immediately above or through a wooden drain, no matter whether the latter be in use or abandoned, nor through unstable or perishable matter of any character unless all such work be carefully placed upon a foundation or puddled earth concrete, or of brick or stone masonry, of such dimension and method of construction as may be directed by the Commissioner of Public Works.