Ohio Rev. Code Ann. § 6105.132

When the board of directors of a watershed district has adopted a resolution under section 6105.131 of the Revised Code, designating a specific reach of a channel of a watercourse as a restricted channel or a specific area as a restricted floodway, it shall cause a copy of such resolution and a map and a description of the boundaries of such restricted channel or restricted floodway to be filed in the office of the county engineer of each county in which such restricted channel or restricted floodway is located. Each county engineer shall maintain a restricted channel and restricted floodway record in which shall be placed all resolutions, maps, and descriptions pertaining to restricted channels and restricted floodways filed with the county engineer under this section.