Temporary asphaltic concrete sidewalks may be constructed in industrial areas or fronting unimproved property; provided, however, that no such sidewalks shall be constructed prior to permission having been granted by the Director of Public Works. The Director of Public Works is hereby authorized to grant such permits to owners of fronting property or their duly authorized agents when in his judgment public interest and convenience require the construction of an asphaltic concrete sidewalk. Asphaltic concrete sidewalks shall be at least five inches in thickness and shall consist of a crushed rock base at least three inches in thickness, and an asphaltic concrete wearing surface at least two inches in thickness. The materials used and the method of construction shall be in accordance with specifications which the Director of Public Works is hereby authorized to prepare in conformity herewith, and as required for public convenience and safety, such specifications and rules to apply to the quality and proportions of the required materials, and the method of application. The finished surface of the sidewalk shall have a uniform, nonskid texture and shall rise 1/5 inch per foot from curb grade to property line.
The Director of Public Works is hereby authorized to order the owner of the fronting property to remove a temporary asphaltic concrete sidewalk and to construct a cement concrete sidewalk in accordance with the provisions of Section 703 hereof, when in the judgment of said Director public interest and convenience require such removal and reconstruction.
The order shall specify the time within which the work is to be completed, and also the time within which the owner must declare, in writing to the Director, his intention to do the work.
The Director, upon receiving written notice of the intention to comply by the owner, or his authorized agent, may if requested by the owner, grant a reasonable extension of the time specified in the order for the completion of the work.