Jefferson County Public Works 725 Maple St Hillsboro, MO 63050 Phone : (636) 797-5340 Jefferson County Public Works Business Category Highway & street construction Grading Contractors Road Maintenance Jefferson County Court House--public Works, Highway Division Hillsboro, MO 63050 Phone : (636) 797-5340 Business Category Government Offices-County County Government-Courts Courts Government Offices & Public Schools