More Narrow Canal Wanderings

There are few things more likely to pique my interest than a nice bit of brownfield. If it has that wartime look - red brick, dodgy mortar, utilitarian fittings, lashings of concrete, indeterminate purpose - I can pick over it for ages.
These anomalous structures are to be found by the towpath at Greenfield. I suspect they're something to do with a waterworks, but that's a guess. If anyone can fill in the details I'd be grateful.

A thing at Mossley. Quite nice as such things go, and tucked away at the back of some terrace houses, rather than making a big gesture outside a town hall or petro-chemical company headquarters where such things are usually sited. The nearby telephone wires lend it a Festival of Britain feel.

A mill at Mossley. All human life is there, as the News of the World used to say. Some alarming subsidence, too. The café looks good, though it's an effort to get to, and there are signs to another one in the vicinity.