Harford County Hwy Maintenance Shop 311 Philadelphia Rd Abingdon, MD 21009 Phone : (410) 612-1616 Business Category Government Offices-County Legislative Bodies Harford County--public Works, Highways Maintenance Shops, Abingdon Edgewood, MD 21040 Phone : (410) 612-1616 Business Category Government Offices-County Government Offices & Public Schools Harford County--public Works, Division Of Engineering & Construction, Bureau Of Highways, Highways Maintenance, Abingdon Edgewood, MD 21040 Phone : (410) 612-1616 Business Category Government Offices-County Government Offices & Public Schools Harford County--public Works, Division Of Engineering & Transportation, Highways Maintenance Shops, Abingdon Edgewood, MD 21040 Phone : (410) 612-1616 Business Category Government Offices-County Government Offices & Public Schools