Build a 200 foot well by hand, 3 feet wide, with possible later adaptation to widen if necessary. Water table 12 feet. Need to know how to maintain wall structure to prevent collapse and water seepage. Do not want water entering anywhere after each session of digging. Yes, I have breathing equipment, sensors, ropes, etc.
I will be obtaining permits, etc. after I see what needs to be done. I know this project sounds ridiculous, but there is a very important purpose for this. I also have soil data available upon request.