170.28 SURFACING.

The subdivider shall at the subdivider’s expense surface all streets being dedicated for public use from curb to curb. Surfacing shall consist of not less than six inches of Portland cement concrete over a prepared subgrade and shall be constructed in accordance with designs and specifications and at grades approved by the Council. Where a surface width in excess of 31 feet is required, the cost of the additional surface width, which shall be assumed to be the center portion of the roadway surface, shall be paid by the City. On collector and thoroughfare streets where a higher standard than is herein required or a thickness of greater than eight inches is deemed necessary by the Council, the additional cost shall be born by the City. Where unimproved street right-of-way exists the owner or developer at the owner’s or developer’s own expense shall improve such right-of-way as required by this section for the entire width of the lot or lots (or for the entire width and the length of the lot or lots in the case of lot or lots bordered by more than one street) prior to or contemporaneous with the development of the lot or lots. The owner or developer shall also improve all other portions of unimproved street right of way serving such areas.