R.I. Gen. Laws § 34-9-1: Petition for determination of boundaries covered by tidewater.

Any person having any interest in land bordering on public tidewater, whenever a harbor line shall have been confirmed and established in front of or adjacent to the land, may apply by petition to the supreme court for the settlement and determination of the lines and boundaries of his interest and of the interests of all others in the land covered by public tidewater within such harbor line.