It shall be unlawful for any person to make or to cause or to permit to be made, any excavation or to install or maintain or to cause or permit to be installed or maintained any tank, pipe, conduit, duct or tunnel in or under the surface of any public street, alley, sidewalk or other public place at any location other than that described in the application and shown on the plats filed by such person as required by the provisions of this chapter.
(`83 Code, § 12.08.030)