Ohio Rev. Code § 940.38: Appeals.

Any affected landowner may appeal to the appropriate court of common pleas any action or determination of a board of supervisors, joint board of supervisors, board of county commissioners, or joint board of county commissioners under this chapter. The affected landowner shall make the appeal within thirty days of the date of the action or determination. The appeal may be based on, but is not limited to, any of the following questions:

(A) Is the improvement necessary?

(B) Will the improvement be conducive to the public welfare?

(C) Is the cost of the improvement greater than the benefits conferred?

(D) Is the route, termini, or mode of construction the best to accomplish the purpose of the improvement?

(E) Are the assessments levied according to benefits?

(F) Is the award for compensation or damages just?