Pothole season in Maine

What potholes look like in Maine:

This is not a construction site. A couple of weeks ago, the Rockland PD got a phone call reporting a large pothole on Old County Road. By the time they got there, this is what they saw. They've since erected the fence, so I couldn't get close enough to take a photo down into the hole, but it goes down about 50 feet. There was apparently a tunnel connecting two old quarries that ran underneath the road. It collapsed, and within an hour or so this crater had opened up, stretching all the way across the road.