The mine is shown as a reentrant with a cliff to its NE edge and a boulder at the SW entrance all west of the boulder cluster feature. The boulder will be removed as not apparent in the terrain. May also open the reentrant a bit to make it more apparent.
Aha! I see what you're talking about now. I didn't think I was that far west, but perhaps my track says I was. I'll quick route it tomorrow, maybe.
The mapped boulder certainly obscures the fact that there's a reentrant there.