If the permittee shall have failed to restore the surfaces of the public properties to their original and proper condition upon the expiration of the time fixed by such permit or upon the completion of the work allowed to be done under such permit, the City Engineer shall, if he deems it advisable, have the right to do all work and things necessary to do so. The permittee shall be liable for the expense thereof upon the bond filed at the time of granting the permit, and the City shall have a cause of action for all fees, expenses and amounts paid out upon such work; provided, that, in any case, it shall be the duty of the permittee to guarantee and maintain the area disturbed for two years after returning it to its original condition; provided, further, that, if in the judgment of the City Engineer, it is not expedient to relay the pavement over any cut or excavation made in any public properties upon the completion of the work allowed under such permit, by reason of the looseness of the earth or weather conditions, he may direct the permittee to lay a temporary pavement of wood or other suitable material designated by him over such cut or excavation, to remain until such time as the repair of the original pavement may be properly made, and in case of the failure of the permittee to commence in good faith the relaying of such temporary pavement within five days after the date of such notice, the City Engineer may lay such temporary pavement himself and collect the cost thereof from the permittee in the manner hereinbefore provided. [Ord. 1021 § 19.14, 1961; Code 1970 § 12.24.350; Code 1954 § 4-5.140.]