The application for an excavation permit to perform excavation work under this chapter shall be accompanied with a cash deposit, made to the administrative authority for deposit with the city treasurer as follows: A sum equal to five dollars per square foot of surface of each excavation to be made in public places which have been paved; a sum equal to three dollars for each square foot of surface of each excavation to be made in public places which have been macadamized; a sum equal to two dollars for each square foot of surface of each such excavation to be made in public places which are neither macadamized nor paved. No deposit shall be less than one hundred dollars. Any person intending to make openings, cuts or excavations in public places may make and maintain with the city treasurer a general deposit in the sum of one hundred dollars and the person so depositing shall not be required to make the special deposits provided in this section, but shall, however, be required to comply with all other applicable provisions of this chapter. Any special or general deposit made under this chapter shall serve as security for the repair and performance of work necessary to put the public place in as good a condition as it was prior to the excavation, if the permittee fails to make the necessary repairs or to complete the proper refilling of the opening and the excavation work under the excavation permit. Upon the permittees completion of the work covered by such permit in conformity with this chapter as determined by the administrative authority, two-thirds of such cash deposit, except in the case of an annual deposit, shall be promptly refunded by the city to the permittee upon the expiration of such twenty-four-month period; provided, however, that as to any annual deposit, two-thirds thereof shall be refunded by the city at the end of the one-year period for which the deposit is made or the satisfactory completion of all excavation work undertaken during such period, whichever is later, and the balance of the annual deposit shall be refunded at the expiration of a twenty-four month period following the completion of such excavation work; and provided further, that the city may use any or all of any such deposit to pay the cost of any work the city performs to restore or maintain the public place as provided in this chapter in the event the permittee fails to perform such work, in which event the amount refunded to the permittee shall be reduced by the amount thus expended by the city; provided, however, that in the case of excavations by public utility companies operating under a franchise issued by the city or under the supervision of the Public Utilities Commission, or utilities operated by governmental agencies, a permit may be granted without making such deposit; but, in such cases, the utilities shall be liable for the actual cost of any work required to be done by the administrative authority in restoring the area covered by such excavations to as good condition as the same was in before such work was done; provided further, however, that the administrative authority may, in the future, require such deposit from any such utility if a bill rendered in accordance with this section remains unpaid thirty days after date of billing. (Ord. 106 §7, 1961).