Big Humpty takes the River Medlock through a short but large egg shaped culvert. The brickwork and shape make this one of the better looking around, although short in length it still makes for good viewing if in the area. When the water is high the sides are treacherous and the going is slow.
I had a play around with some timelapse, there's potential but the ideas need work. Despite spending ages sitting around I only got a few seconds footage from it, so here's the result padded out with some video.