Ohio Rev. Code § 6119.52
A water resource project authorized under section 6119.51 of the Revised Code shall be constructed in accordance with section 6119.10 of the Revised Code and, after the actual cost of such project has been ascertained, the board of trustees of the regional water and sewer district shall by resolution assess, in the manner provided in the resolution of necessity adopted under section 6119.46 of the Revised Code, upon the lots and lands enumerated in the estimated assessments adopted under section 6119.51 of the Revised Code, the total cost of the project or such lesser portion thereof as is to be specially assessed and such assessment as to each lot or parcel of land shall be increased or decreased in the same proportion to the estimated assessment on each such lot or parcel of land as the actual cost of the project bears to the estimated cost of the project upon which the estimated assessment was based. All such assessments shall be payable as provided in the resolution of necessity adopted under section 6119.46 of the Revised Code, and shall be final upon the adoption of the resolution provided for in this section.
Assessments made under this section shall be filed with the secretary of the board of trustees of the regional water and sewer district and shall be open to public inspection.
Upon the passage of such resolution levying special assessments, the board shall publish notice of the passage of such resolution once in at least one newspaper having a general circulation in the district, stating that such assessment has been made and is on file in the office of the secretary for the inspection and examination of persons interested therein.
Such special assessments are payable by the time and in the manner stipulated in such resolution, except that any such assessment in the amount of twenty-five dollars or less, or any unpaid balance or any such assessment which is twenty-five dollars or less, shall be paid in full, and not in installments, at the time the first or next installment would otherwise become due and payable, and are a lien from the date of the passage of such resolution upon the respective lots or parcels of land assessed.
R.C. § 6119.52