Ohio Rev. Code § 5553.20
When the county engineer is unable to ascertain with certainty the true course and boundary line of a road, the board of county commissioners may prosecute a civil action against the owners of the land abutting upon such road to ascertain and have the boundaries of such road judicially established in one action. Any road, the true course of which is surveyed and fixed as provided in this section and sections 5553.18 and 5553.19 of the Revised Code, shall to the limits of such boundaries be a public highway. The engineer and board may not change the line of any road under sections 5553.18 and 5553.19 of the Revised Code from that which has been opened and used by the public for a period of seven years immediately preceding the application provided for in section 5553.18 of the Revised Code; but this section does not authorize any encroachment by abutting property owners on said road as opened and used.
R.C. §5553.20