§ 91.035 MANNER OF EXCAVATING.
   (A)   It shall be unlawful to make any excavation or tunnel in any way contrary to or at variance with the terms of the permit therefor. Proper bracing shall be maintained to prevent the collapse of adjoining ground. In excavations, the excavation shall not have anywhere below the surface any portion which extends beyond the opening at the surface.
   (B)   No injury shall be done to any pipes, cables or conduits in the making of excavations or tunnels. Notice shall be given to the persons maintaining any pipes, cables or conduits or to the village department or officer charged with the care thereof, which are or may be endangered or affected by the making of any excavation or tunnel before the pipes, cables or conduits shall be disturbed. No unnecessary damage or injury shall be done to any tree, shrub or the roots thereof.
(`92 Code, § 33-4-6) Penalty, see § 10.99