Spanky, for those who still have access to my pictures will see a picture with a vertical support log and a gloved hand in the picture. there is an alcove cut out there and the log is support for the roof. We stopped at that point in the tunnel and Gary explained to me how they drill. They will set up the drill and drill up, the drill will be going through rock and at some point you will hit gravel, they know how far up they have gone at that point. They will move the drill over 5-10 ft and drill up again until they hit gravel again and move the other way and drill up again. They will do this, documenting everything along the way. By doing this they can determine the center of the channel and they can sample the gravel. If they feel the channel is promising enough to work they will build a raise up from there to the channel. Inmine can probably give you a better idea of what kind of drill is used and how it works but Gary made it a point to stop at that point and show what and how they do a drilling program. Charlie made a comment that the place we stopped, which was about halfway into the tunnel, he felt might be a good channel but wouldn't know until they drill it.
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