They started breaking up the footings from Zellmer's parent's house-that-never-was.
Also notice the drain tile - circled in red.
Same shot, zoomed out.
Looking Northeast-ish from the end of John Huettl's driveway - as much as is left of it.
Looking North from John Huettl's yard towards Pepper's place.
Looking Southwest from control point #31 - just off of Pepper's driveway.