In making any such connection, the surface of any street or alley shall be restored to as good a condition as found before the excavation was made and any existing improvements which may have been interfered with or injured in any way shall be restored to as good a condition as they were in before such interference or injury. No connections shall be constructed in such a manner as to permit the entrance of surface drainage and suitable provisions shall be made to prevent the entrance of mud or silt into any such connection. (1986 Code § 19-105; amd. 2012 Code)