And the sixth image, do you know what earthen dam that is?
It is the Brockport East Dam, running about 1.2 miles east, from the Park Avenue Lift Bridge. It ranges in height between 7' to 27', and has been fully cleared, re-sloped replanted with grass, and has barrier vegetation planted, all part of the promised EERP Restoration process.
The stone section is standard protection for a dive culvert located there, that runs under the Erie Canal. Culvert number 57 I believe.
It looks much better than the ragged mess it used to be, most people agree, though some minor issues with dam refurbishment that are still being worked through of course.