The basic idea behind this project in Ghana was to keep the villagers from moving to the overcrowded cities by providing them with safe drinking water and sanitation.
The bedrock formation in Ghana is much the same as it is in the northeastern United States. Most of the formation is comprised of granite, schist, mica, quartz, etc. There are two rainy seasons in most of the country, so there is ample recharge to the bedrock. The project dictates a maximum hole depth of 60 meters (approx. 200 feet). A minimum of 13.5 liters (4.5 gpm) is needed for a successful well, which will supply a village of 300-350 people. If a well was drilled and did not produce the needed volume, it was immediately backfilled and abandoned.