For other than hard-surfaced streets the procedure described in § 97.33 for hard-surfaced streets shall be followed, except that it shall not be necessary to remove materials at the edge of each side of the trench. The last 12 inches of trench opening shall be filled and tamped as specified above with either No. 34 or No. 46 limestone or an approved equal as designated by the Street Superintendent.
(`63 Code, § 901.05) Penalty, see § 97.99