All pavement and sidewalk openings for trenching purposes shall be removed in complete sections regardless of age. The minimum width of all openings shall be no wider at the bottom than at the top of such trench. Undercutting of openings is hereby prohibited.
When bad expansion joints are sawed out for replacement, the sawcut shall be at least 36 inches on either side of the bad expansion joint. Each repair will be reviewed to ensure that a small area of old pavement is not left before the next expansion joint is encountered.
When an underground main, pipe, conduit, cable, or other public utility, or any appurtenance thereto, is involved with any sidewalk, the public works director shall determine whether the entire sidewalk, a panel or panels, or a segment or segments less than a panel or panels, shall be removed.
Any deviation of this section must first be approved by the director of public works.