How to stay connected: Ph: 571-374-6550 Hours: 7 a.m. - 4 p.m. Location: 13833 Dumfries Road Manassas, Virginia 20112 Fax Numbers Main Office 571-350-9648 Satellite Office: 571-350-9637 Clinic and Nurse: 703-791-8914 Bookkeeper: 703-831-8952 School Counseling: 571-748-6551 Special Ed: 571-748-6572 Athletic Dept: 571-748-6633 Social Media Accounts @colganhs @colganhs @colgansharks