Drilling for pockets? Options

[jimmyrig]

Has anyone ever attempted to use a 4ft bit to drill for pockets? I understand power tools are prohibited on public land. Just theoretical. Say I have a 4ft diamond bit and a 1/4" endoscope and a 20v max hammer drill

[jimmyrig]

So I've done a bit of testing in my yard with this technique and after a few adjustments it's working pretty good considering this is clay rich soil that gets watered every day. I quickly got 4 feet down in about 20 seconds with a 9/16 flex bit. Tried to get the camera down there but since it is so tiny, one little grain of mud can mess it up.

I added rainX to the lense and it helped but not enough. So I ended up using a caisson technique that I remember seeing on the curse of oak Island. I very lightly get a pilot hole started with a 9/16 bit. then follow with a 3/4 bit. After drilling has finished I use a 3/8 white PVC drainage tube. This is my caisson where my camera can work. I run the camera through the tube up to about 2 inches from the bottom. Then I insert the tube into my drilled hole slowly and watch the screen for any null space or shiny stuff on the walls of the drilled hole.

Unfortunately there are no mineral pockets in my front lawn... but if there were I feel the clarity is good enough that I would definitely see it. I'm taking my equipment out in the field today for an initial run.