9-380: Pristine, Mine Site One, Ore Transfer Station
Your math is correct, and yes, there is not much between the Mine and Clement Basin.
Just past top of the hill as you climb out from the basin, the buckets leave the road and head off toward the spaceport.
Oliver thanks the worker and returns to the crawler. To the crew, he says “I think Argyle road the belt to the refinery then stowed away on a ship at the spaceport and left the planet.”