The last time I saw such large desolate mounds of earth, was during the "Big Dig" here in Boston. Occasionally a car would wind up in the picture due to a badly placed construction sign. As each load of dirt came up from underground and was dumped into the mountains, a team of archeologists, and geologists would converge on it to seek any artifacts of Boston's early history. Each load was documented, so that any finds could be traced back to where the load came from. Only a few started other investigations. I think it was ten archeological, and three geological surveys that were triggered. They did not contribute any to the delay of construction as the contractors moved to another area of work while the investigation used the area they were in.
We are forever surprised at what lays under our feet (and tires).
Keep up the good work Barb.
Slainte