This last week has been pretty long (in a good way).  We did a lot of traveling around the locale in search of numerous wells which were either built or in production.  In total, we investigated four wells. One was being drilled, the first stage in building a well.  A giant drilling machine is used to push a 30m tube of PVC pipe into the underground water supply. Some wells are not sunk as deeply as this (only ten meters or so), but those wells run the risk of drawing on contaminated surface water from nearby.  The machine is definitely something to behold.  It has a large generator-motor section which connects via belt to a very tall tower where pieces of pipe are placed and then spun into the ground.  The first piece of pipe has a bit attached to it.  The remaining pipe pieces are connected to the first pipe as it makes its breathtakingly fast descent into the ground.  It is manned by three men: one whose sole purpose is to get muddy water sprayed in his face for eight hours while staring at the drill hole.  The second man's job is to collect muddy water created by the drill (they stop drilling if they do not get water of course) and pour it into the motor to cool it.  The last person stands in close proximity and, I assume, places new pieces of pipe in the machine when the current top piece gets close to being completely underground.  Another well was being dug out when we arrived to see it.  Two men first dig a hole, approximately one meter in diameter, eight meters deep around the drilled pipe.  Then, they carry pre-made cement rings, about one half meter tall (maybe 130lbs), on a bamboo shaft to the wellhole, and then use a pulley system to lower it into the well.   Bud, my pastor, and I were able to coerce the workers into letting us place one of the cement rings ^_^  After they finished placing the rings to about one meter above ground, they would bond them together with more cement, and then cement the ground around the well.  The other two wells we saw were already completed.  One was older than the other, and the water potable.  The younger one, however, was murky because in the building process dirt got kicked up in the water supply.  I am told it will settle in a week or two.