Ohio Rev. Code § 4955.30
A person owning or operating a coal or iron-ore mine, stone quarry, rolling mill, or machine shop, who, as a means of removing the product thereof, uses or desires to use a railway, may construct one and run cars on it, over or under any railroad or public highway, the consent of the owner of the fee in the land at such crossing first being obtained. Such railway shall be so constructed that it will not impede or interfere with the running of cars or the travel upon such railroad or highway, or in any manner injure or impair either, or any switch, building, or appurtenance connected with or belonging to any railroad or highway. When such freightway is constructed over a railroad, it shall be at the height of at least eighteen and one-half feet in the clear above the rails of the railroad.
R.C. § 4955.30