The tall chimneys fed engines that fed pumps, to keep the mines dry. That's what Vic says, anyway. We encountered a pump house described as "Cornish" when we toured the U.P. of Michigan in the 1990s.
See the tall spire on the right? That's a chimney. The foreground is part of a very hilly golf course.
Same spire, different (closer) view.
Below is a Cornish pump house--pic the work of Vic, who does not bother to line things up when using my iPad. It had a chimney that the angle and sun must have obscured.
Seriously, we have seen lone chimneys EVERYwhere, and pump houses in a good many places, too.
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