The said viewers having been duly sworn or affirmed faithfully, justly and impartially to decide, and true report to make concerning all matters and things to be submitted to them, and in relation to which they are authorized to inquire in pursuance of the provisions of this act, and having viewed the premises or examined the property, shall hear all parties interested and their witnesses, and shall estimate and determine the damages for property taken, injured or destroyed, to whom the same is payable.
53 P.S. § 1082