Mission organizations working in 3rd world countries have struggled for years to help locals obtain a source of clean water. Well-intentioned people have provided money and powered well-drilling machinery over the years, but the lack of supporting infrastructure coupled with a absence of technological skill quickly doomed many well-drilling projects. In these conditions, the KISS! principle (keep it simple, stupid!) reigns supreme!
This site http://www.wellspringafrica.org/WebManual/default.htm provides a good deal of information on hand-powered well drilling in general. The methods and tooling being described are VERY simple and can be carried out by anyone with a moderate amount of building skill. I'll try to discuss various aspects of the subject material in the coming weeks.
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