Whenever the commission shall find upon a hearing and an investigation that the plant or equipment of any public utility is inadequate, insufficient, or unsuited to the public needs, or that repairs, improvements, or changes in the plant or equipment ought reasonably to be made, or that an addition to, alteration, or extension of the plant or equipment of any public utility ought reasonably to be made, the commission shall order that the repairs, improvements, changes, additions, alterations, or extensions to the plant or equipment be made within a reasonable time and in the manner specified.
R.I. Gen. Laws § 39-4-2