Before Volcano, the Mountain did incorporate three attractions:
1) The mine ride you reffer to was in actuallity a dark ride of some sort, and when I was there in 1994 they had some signage about a dinosaur themed dark ride going in its spot. I guess that never happened :)
2) Haunted River or Forbidden River something like that, it was sorta like Splash Mountain at WDW. The same two across logs, and the first half was a dark ride then you went up a hill, and as you went down the big drop you exited the mountain, again sorta like Splash Mountain.
3) Time Shaft - a celverly themed indoor Rotor.
I deeply regret that they evicted all three residents of the mountain.
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David Bowers
Mayor, Coasterville