In water stressed areas, groundwater has been drawn down so far that borewells now commonly extend 800 to 1,000 feet below the surface. These are not traditional open wells but narrow, deep shafts drilled to reach shrinking aquifers. As water tables fall, new wells are drilled deeper and older ones are extended, increasing both cost and risk. When pumps fail at these depths, repairs are not always as simple as pulling the entire assembly back to the surface. In some cases, technicians are carefu