Ohio Revised Code Title III. Counties § 315.12

(A) Two thirds of the cost of operation of the office of county engineer, including the salaries of all of the employees and the cost of the maintenance of such office as provided by the annual appropriation made by the board of county commissioners for such purpose, shall be paid out of the county's share of the fund derived from the receipts from motor vehicle licenses, as distributed under section 4501.04 of the Revised Code, and from the county's share of the fund derived from the motor vehicle fuel tax as distributed under section 5735.27 of the Revised Code.

(B) Where employees of the county engineer are temporarily assigned to perform engineering and plan preparation work on a bond-financed project, their salaries and expenses for such work may be paid from the proceeds from the sale of such bonds, instead of from the fund as provided in division (A) of this section, from whence their salaries and expenses are ordinarily paid.