I found the lower-left aerial view of Grizzly River Run during construction, after rockwork was complete and landscaping was partially in (e.g., trees planted). It provides a good look at what is piled dirt and what is concrete rockwork, and actually much less than I thought is concrete rockwork.
Overlaying a possible coaster track (lower right image) shows that very little of it would overlay on top of concrete rockwork (supports shown with red dots), nearly all of the coaster and footings could land in earthen mounds and landscaped areas.
I included some inspirational images of mining structures which typically have those covered ramped conveyors, which is perfect for Lift 2 along the two-story queue building. Lift hill 1 to the top of the rockwork would be an exposed trestle.
This project looks more feasible than I thought, I think I'm going to move ahead and green light it (Armchair Executiveering

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