County Engineer – ORC Chapter 315
The county engineer is the county’s surveyor and civil engineer. The primary duty of the county engineer is to plan, design, construct, and maintain the county road system, including county bridges. The engineer also has responsibility for township bridges and for bridges within municipalities on through routes. Unlike most other county elected officials offices, the engineer is primarily funded with dedicated motor vehicle license and gasoline taxes.

The engineer is also responsible for maintaining the auditor’s tax maps including reviewing deeds, land transfers, lot splits, and annexation petitions for proper boundary descriptions.

Contact the Darke County Engineer’s Office at 937-547-7375 or email Jim Surber at