All driveways constructed at any place where no sidewalk exists shall conform to the appropriate standards or specifications adopted by the Public Works Director and approved by resolution of the City Council. All driveways shall be constructed of Portland cement from the street to the property line. All driveways shall be constructed of Portland cement or asphalt at any location beyond the property line. All driveways shall be constructed so that the normal flow of drainage in the adjoining street will not be diverted or obstructed. In the event any person is unable to construct a driveway to grade, the owner must sign a waiver agreeing to indemnify the City from all liability arising from the maintenance and construction of the driveway.