When it shall be impracticable to open, construct or maintain an entrance across any drainage ditch or drain under the foregoing section, such places may be bridged by culverts at driveway entrances. Such culverts or bridges shall comply with the plans and specifications of the city engineer. All such culverts shall be of sufficient capacity as not to interfere with the drainage, and the same shall be subject to approval by the city engineer or director of public works. The abutting lot owners shall pay the cost of all such culverts in the manner provided by law. (Prior code § 14-209)