No commercial dock shall extend further into the waters of Lake Minnetonka than is reasonably necessary to accommodate the docking of the craft as shall customarily and lawfully be used upon the waters of Lake Minnetonka so as to interfere with, obstruct or tend to obstruct or render dangerous for use or passage a body of water within the primary harbor limits of the city. All commercial docks and wharves shall be constructed and maintained of the materials and of the type of construction as will not render the same unsafe or apt to endanger public enjoyment of the waters.
(1987 Code, § 304.07)