A.   Concrete curbing or combined concrete curb and gutter shall be constructed on each side of all street pavement except where waived by the village board.
   B.   Curbing shall consist of poured cement concrete and may be either plain concrete curb, six inches (6") in thickness and eighteen inches (18") in depth, or combination curb and gutter consisting of a gutter flag not less than fifteen inches (15") in overall width and seven inches (7") in thickness with a straight or roll type curb superimposed thereon, having an average thickness of six inches (6"). Minimum height of the curb shall not be less than three and one-half inches (31/2") above the gutter grade. (1995 Code § 5.403)