...SJRPP does, is who. (Catch the reference? Clues follow.)
Wiki-wandering, I was struck by the extensive water access in and around Jacksonville, Florida and points South; the First Coast has all manner of coast to it. My attention was drawn to a big freight-type terminal on an island and I idly followed the roads and rails and -- hey, what's that thing? Light rail? Not exactly.
It runs from NW to SE in the linked view, paralleling roads and rails; zoom out and have a look. I even had a Street View look where it crossed a road and wasn't entirely sure. (Bear with, I don't know if that'll work.)
Followed to the end, it was pretty obvious what it was carrying and further searching brought up a nice flyer about the installation it serves, and how: it's a 3.2-mile, fully-enclosed (what do the neighborhoods say?) conveyor belt for coal. Reading it is a reminder that we are still, on a fundamental level, living in the Age of Steam, the Age of Coal.
Who makes the coal roll? Techs and engineers, boilermen and steamfitters. Not the Technocrats, outside of fiction.
Gotta keep the lights on; gotta keep those air conditioners spinning! --Oh, and your electric (coal and steam powered) car charged up, too.
5 months ago