As contractors widen Interstate 66 in Northern Virginia, they produce tons of excess dirt. So do excavators digging basements for homes or leveling land for commercial projects or schools. Some of that dirt – no one knows how much – ends up on Fauquier County properties. Some county officials think it is way too much. “Fauquier County is becoming, if not has already become, the dumping ground for Northern Virginia's fill dirt. And it's obviously a huge problem. And it's affecting people's lives,” county supervisor Rick Gerhardt (Cedar Run District) said at April’s Board of Supervisors meeting, as residents complained...