It shall be the duty of every person, partnership or corporation who excavate upon land owned or occupied by them to a depth exceeding 12 feet below the established grade of a street or highway upon which such land abuts or, if there be no such established grade, below the surface of the adjoining land, to furnish sufficient lateral and subjacent support to the adjoining land to protect said land and all structures thereon from injury due to the removed material in its natural state, or due to the disturbance of other existing conditions caused by such excavation.

     Such owner or occupant shall be liable to the proper person entitled to sue therefor, for the actual damage to land and structures and any other resulting damages, arising from failure to fulfill the duty created by this act. They shall also be liable to occupants or tenants of such land or structures for damage to their property or business proximately resulting from injury to such land or structures caused by their failure to fulfill said duty.

     The owners or occupants of adjoining lands or structures shall also be entitled to relief in a court of equity by way of injunction or other appropriate equitable relief, to restrain the prosecution of such excavating operations without the taking of such precautions to provide such lateral and subjacent support as are reasonable under the circumstances, and it shall not be necessary in such proceedings to allege or show that there is no adequate remedy at law. Such court of equity shall have jurisdiction in such proceedings to adjudicate all disputes arising in connection with the subject matter thereof.

     The remedies herein provided and the duty herein created are in addition to the duty and remedies existing at common law.