Had the chance and dived the mine in Missouri.  The site and diving is
described very well in a posts to this group.  Diving is just as described.
We started and ended with six divers on the first dive.  One man filled his
drysuit and bowed out for the second dive taking his daughter with him.  The
father, son, and cousin from St. Louise canned the second dive because the
father had to take his mothers car home.  I finished the second dive and
rode to Memphis.  I think this was a good experience for learning buoyancy
skills and seeing new things.
Rocky