Good one, John.
Now where would those caves be at? If this is not on the tip of your tongue, maybe the old Ute-Alpine Club is still functioning at the U. of Utah and might provide the information. I belonged to it long ago where we engaged in rock climbing on Pete's Rock along Wastach Blvd but passed up the spelunking trips that were also part of their activities. I'm trying to remember whether there was a vertical cave somewhere in the county that held some distinction for being the most...? deepest? what was it? It was secretive because of its danger.