(a) If it appears that a person has violated, is violating, or is threatening to violate this subchapter or a rule adopted or order issued under this subchapter, a political subdivision may institute a civil suit in the appropriate court for:
(1) injunctive relief to restrain the person from continuing the violation or threat of violation, including an order directing the person to remove illegal improvements and restore preexisting conditions;
(2) the assessment and recovery of the civil penalty provided by § 16.322; or
(3) both the injunctive relief and the civil penalty.
(b) On application for injunctive relief and a finding that a person has violated, is violating, or is threatening to violate this subchapter or a rule adopted or order issued under this subchapter, the court shall grant the injunctive relief that the facts warrant.