Wherever the owner of any building, fence or other obstruction, standing or encroaching upon any street, alley, sidewalk, or other public ground in the city, shall refuse or neglect to remove the same after notice as provided in Section 12.04.020, the same shall be deemed a nuisance, and it shall be lawful for the mayor to cause the same to be removed or taken down in his discretion, and the cost thereof shall be added to the penalty prescribed in Section 12.04.020 of this chapter; and every person who shall oppose or resist the execution of the orders of the mayor made in pursuance hereof shall, upon conviction, be fined not less than one dollar and not more than one hundred dollars. (Ord. 5 Art. 3 § 3, 1909)