None of the duties or privileges imposed or conferred by this chapter shall in any way be deemed to authorize or allow the obstruction of any street, either during or after any work upon any sidewalk, except under permit therefor. No material removed from any sidewalk shall be placed upon any portion of any adjacent street, alley, place or square, except permit therefor be granted. All refuse lumber and debris remaining after the completion of any sidewalk repairs or renewal shall be removed from the street forthwith. Any owner, lessee or tenant of abutting property who shall fail to remove any such obstruction from any street, alley, place or square within forty eight (48) hours after being notified by the public works director so to do, shall be deemed guilty of maintaining a public nuisance and shall be subject to the penalties prescribed therefor. In case of such failure to remove obstructions after such notice, the public works director shall cause the same to be removed and shall charge the full cost of such removal to such owner, lessee or tenant and the said charge shall become a lien upon said abutting property and shall be collected as hereinbefore provided for the collection of cost of construction or repair of sidewalks. (Ord. 72, 10-17-1949; amd. Ord. 224, 9-17-2002)