On our most recent trip to Mwene Ditu we stopped to look at a new well we were having dug for our missionary apartment there (they had never had water at the apartment, and had been buying water for use–cooking, cleaning, toilets, etc.).
The well was about 40-50 feet deep to hit water. The next step is to install a concrete cap with a hole in the top large enough to drop a bucket down. They are also installing a rope/wheel to easily bring up the water.
The number one issue/problem in the Congo is water, or lack of water (not even clean water–any kind of water!)