On the morning of Thursday, August 16th, calls began to reach emergency response teams working within Fairfax County that reported a dump truck accident that had taken place along a ramp that connected Interstate 495's outer loop with Interstate 66. First responders, including numerous units with the Fairfax County Fire and Rescue team, rushed to the area and found the crash as reported, but they were also confronted with an incredible amount of debris along the roadway that indicated any cleanup would take a significant amount of time.
The initial reports from the rescue crews did not indicate just why the crash happened in the first place, but we do know that it involved a dump truck and that, at the time of the incident, the truck was carrying a full load of dirt. The reports failed to indicate whether or not the dirt was contaminated with oil or some other substance that the truck may have been taking to a soil remediation location or if the dirt inside of the vehicle was fresh dirt to be used elsewhere, but the fact remains that the dirt-filled truck resulted in an enormous amount of cleanup for emergency crews to address and, subsequently, extraordinary delays for those attempting to travel along I-495 and I-66.
Units with the Fairfax County Fire and Rescue service responded to the incident at 10:37 in the morning, and were confronted with the dump truck which had overturned after a collision that was not described in great detail. As a result, the entire load of dirt that the truck was hauling spilled out of the bed of the truck and onto the roadway itself. The report indicated that the incident also resulted in a small fuel spill, although there was no news on where the fuel came from or how it was cleaned up (other than to say that the Fairfax County Fire and Rescue handled it).
It is not believed that any of those involved suffered from severe injuries, but the cleanup process took a long amount of time and resulted in lengthy delays along a large swath of I-495.