The permittee shall at all times at his or its own expense preserve and protect from injury any adjoining property by providing proper foundations and taking other measures suitable for the purpose. Where in the protection of such property it is necessary to enter upon private property for the purpose of taking appropriate protective measures the permittee shall obtain permission from the owner of such private property for such purpose, and if he cannot obtain such permission from such owner the administrative authority may authorize him to enter the private premises solely for the purpose of making the property safe. The permittee shall at its own expense shore up and protect all buildings, walls, fences, or other property likely to be damaged during the progress of the excavation work and shall be responsible for all damage to public or private property or highways resulting from its failure properly to protect and carry out said work. Whenever it shall be necessary for the permittee to trench through any lawn area, said area shall be reseeded or the sod shall be carefully cut and rolled and replaced after ditches have been backfilled as required in this chapter. All construction and maintenance work shall be done in a manner calculated to leave the lawn area clean of earth and debris and in a condition as nearly as possible to that which existed before such work began. (Ord. 119 § 1(1014), 1969).