No person shall impede, obstruct, or tear up any pavement, sidewalk or crosswalk, or any part thereof; dig any hole, shaft, ditch or drain; or dig or remove any sod, earth, stones, sand or gravel from any street, avenue, alley and public place without first having obtained a permit from the director of public works; or hinder or obstruct the making or repairing of any public improvement or work ordered or done by or under the authority of the city. (Ord. 2005-1, 3-7-2005)