Maryland Code, Public Utilities § 12-134

(1) is performing an excavation or demolition in a negligent or unsafe manner that has resulted in or is likely to result in damage to an underground facility; or

(2) is intending to use procedures to carry out the excavation or demolition that are likely to result in damage to an underground facility.

(b)(1) To make its judgment or processes effective, the court may join as parties any persons necessary or proper.

(2) If appropriate, the court shall issue a final order granting the injunction or writ of mandamus.