Franklin County Of--engineers Office, Highway Maintenance Dept-24 Hour Number, Groveport Headquarters 970 Dublin Rd Groveport, OH 43125 Phone : (614) 836-3800 Business Category Government Offices-County Government Offices & Public Schools Franklin County Engineer 4801 Hendron Rd Groveport, OH 43125 Phone : (614) 836-3800 Franklin County Engineer Business Category Government Offices-County Legislative Bodies Government Offices & Public Schools