The deepest drillhole on earth, the Kola Hole in Siberia, at a depth of 12km did have water-filled fissures. Aquiclude - a confining rock layer with low permeability. A karst aquifer in Edwards limestone which is highly permeable, even cavernous. Read text, p.248. Catfish farmer tapped in and drew out one-half of the aquifer's water.
Big pumps get the most water, and drawdown the aquifer.
Groundwater capture is subject to very little legislation, in general. The aquifer is used to irrigate 14 million acres of land. It was filled with water when the last great ice sheet melted. It may be depleted in a few decades. The cone of depression intersects the lower salt water zone.