All electric light, telephone, telegraph or other poles and all trees, when such poles and trees stand within the space used for sidewalks, or in the surface drainways of the streets, and constitute obstructions thereto, are hereby declared to be nuisances. It shall be the duty of the superintendent of streets to demand, in writing, of the parties responsible therefor, that the obstructions be removed and in case of failure of the parties to so remove any of the obstructions within thirty (30) days after notification, the superintendent of streets shall proceed immediately thereafter to remove the obstructions. (Ord. 507, 8-9-1901)