Ohio Rev. Code § 6115.70
If any person or public corporation, within or without any sanitary district, considers itself injuriously affected in any manner by an act performed by any official or agent of such district, or by the execution, maintenance, or operation of the official plan, and if no other method of relief is offered under sections 6115.01 to 6115.79, inclusive, of the Revised Code, the remedy shall be as follows:
The person or public corporation considering itself to be injuriously affected shall petition the court before which said district was organized for an appraisal of damages sufficient to compensate for such injuries. The court shall thereupon direct the board of appraisers of the sanitary district to appraise said damages and injuries, and to make a report to the court on or before the time named in the order of the court. Upon the filing of said report of the board of appraisers, the court shall cause notice to be given to the petitioner and to the board of directors of the sanitary district of a hearing on said report. At the time of such hearing, the court shall consider the report of the board of appraisers, and may ratify said report or amend it as the court deems equitable, or may return it to the board of appraisers and require it to prepare a new report. Upon the filing of an order of the court approving said report of the board of appraisers, with such modifications as it has made, said order constitutes a final adjudication of the matter unless it is appealed from within twenty days. Appeal to a jury from said order may be had by the petitioner, by the board of directors, or by any person or corporation which has been assessed for the costs of the district. No damages shall be allowed under this section which would not otherwise be allowed in law.
R.C. § 6115.70