All damage done to existing improvements during the progress of such work shall be repaired by the permittee. Materials for such repair shall conform to the requirements of applicable ordinances. If, upon being ordered, the permittee fails to furnish the necessary labor and materials for such repairs, the City Engineer may cause such necessary labor and materials to be furnished by other parties, and the cost thereof shall be charged against the permittee, which shall be liable on its bond therefor. [Ord. 1021 § 18, 1961; Code 1970 § 12.24.210; Code 1954 § 4-5.84.]