(A) Where working space will permit, trenches may be excavated by machine, provided that by so doing, public and private improvements will not be subjected to an unreasonable amount of damage.
(B) If, however, excavation by machine methods cannot be made without material damage being done to public and private improvements, hand excavation shall be employed.
(Ord. 97-7, passed 7-1-1997, § 5.16)