Hammond Pond is held back by a gravel berm and this wooden structure, which I s thinking is probably also to help the fish. It looks like part of the Hammond Pond Dam is washed out so it's much less of a dam then it once was.

This is the view from the campsite at the end of Hammond Pond. There is supposedly a trail along the south end of the lake, which follows an old woods road,but I did not stick around long enough to fully explore it.