Ohio Revised Code Title III. Counties § 315.11

(A) The county engineer shall keep the engineer's office in the county seat, or at another location as provided in division (B) of this section, in such rooms as are provided by the board of county commissioners, and which shall be furnished with all necessary cases and other suitable articles at the expense of the county. Such office shall also be furnished with all tools, instruments, books, blanks, and stationery necessary for the proper discharge of the official duties of such engineer. The cost and expense of such equipment shall be allowed and paid from the general fund of the county upon the approval of the board. The engineer and each assistant and deputy of such engineer shall be allowed reasonable and necessary expenses, incurred in the performance of official duties.

(B) With the consent of the county engineer, the board of county commissioners may provide by resolution for establishment of the primary office of the county engineer at a location outside the county seat. The adoption of the resolution and the location of the engineer's primary office shall be entered on the journal of the board. The board shall give reasonable public notice of its action taken pursuant to this division in accordance with division (F) of section 121.22 of the Revised Code.