Ohio Rev. Code Ann. § 6155.09

The board of county commissioners shall apportion to each of the petitioners under section 6155.01 of the Revised Code and all other landowners benefited by the removal of the milldam, in an equitable manner, according to the benefits to be derived therefrom, the costs of the proceedings, as in county ditch cases, the amount asked by the owner of the milldam and agreed upon, and the amount of cost necessary to its removal, as reported by the county engineer.