Gravel Pit Conveyor Tunnel
A brief look at a gravel pit's loading terminal.
Train cars deliver the gravel to a bridge with open slots in it, where the gravel is dumped. Under the pile of gravel are loading chutes leading into a conveyor tunnel, the gravel is drained off the bottom of the pile onto the conveyor, then travels through the tunnel and up another conveyor to the top of a larger pile nearby.
Yeah, I don't have much to say about this one, I was bored and no one was looking.