This is my 3rd attempt at this. I dug a 5" well shaft using 3 foot of grain auger welded to 10 foot of 3/4" pipe. I screwed it in the ground 18 to 24" at a time and pulled it out with an engine hoist (I now have a tractor with a FEL, so that part just got easier)
I can get down 10 feet before I hit rock. Its the old orange looking rock, the blasters call it peanut. It is probably around 14" thick and the water is under that.
This time I plan on putting in 4" PVC for a casing when I get it cleaned out. I bought a 3" x12" core drill the last time I worked on this, but never got around to trying it. I am not sure how to get the plug out if the core drill gets "full" and doesnt bust through the bottom. I thought about adding a few inches to the core drill. It would have to be the same size as the original and cant have any bumps where the weld is..... then hope it doesnt bust off in the hole. Option #2 was to cut as far as I can with a core drill then try to bust out what is left with a 10# yo-yo (johnson bar on a chain) or make a 10 foot extension for a jackhammer. I think the core will bust up before the bottom falls out plugging the hole, now I need a way to get the loose stuff out... I dont have a clue on how to do that, the auger wont fit in the hole in the rock.
I though about taking a sledge hammer to the drill shaft once it stops cutting to bust it through, but the core drill was kinda expensive and I might need it again, so I would hate to jack it up
Edited by tater195, April 27, 2015 - 11:47 AM.