Unless a general excavation permit bond is deposited or filed as required by Section 13.12.160, each application for a permit to excavate as required by this chapter shall be accompanied by a special deposit or bond to guarantee the faithful performance by the application of the completion of all excavation and backfilling work required under this chapter and full warranty of all the work performed for one year after completion, and for the payment of laborers and materialmen, and for the permit when issued, and the payment of all inspection fees charged therefor. No permit shall be granted until the deposit is made, or the bond posted, which shall be in the amount of the estimated cost of restoration of the excavation, as determined by the public works director, but in no event less than the minimum established by city council resolution. (Ord. 1970 NCS §3 (part), 1994; Ord. 1369 NCS §2 (part), 1979.)