Girard Artesian Well
Posted by: 
BeckyLee
N 41° 59.232 W 080° 19.118
17T E 556440 N 4648579
Girard, PA Artesian Well
Waymark Code: WMCCD8
Location: Pennsylvania, United States
Date Posted: 08/21/2011
Views: 26
This is an artesian well found in Girard Pennsylvania on South Creek Road. You may drink the water as many residents do. Don't forget your milk jug to take some home with you. This is also my husband's Earthcache. Three good reasons to stop by: Waymark, Earthcache, and fresh water. That's what life is all about!
Here is some info on Artesian Wells. Stop by Facedances Earthcache for some diagrams.
ARTESIAN WELL:
A deep drilled well through which water is forced upward under pressure. The water in an artesian well flows from an aquifer, which is a layer of very porous rock or sediment, usually sandstone, capable of holding and transmitting large quantities of water. The geologic conditions necessary for an artesian well are an inclined aquifer sandwiched between impervious rock layers above and below that trap water in it. Water enters the exposed edge of the aquifer at a high elevation and percolates downward through interconnected pore spaces. The water held in these spaces is under pressure because of the weight of water in the portion of the aquifer above it. If a well is drilled from the land surface through the overlying impervious layer into the aquifer, this pressure will cause the water to rise in the well. In areas where the slope of the aquifer is great enough, pressure will drive the water above ground level in a spectacular, permanent fountain. Artesian springs can occur in similar fashion where faults or cracks in the overlying impervious layer allow water to flow upward. Water from an artesian well or spring is usually cold and free of organic contaminants, making it desirable for drinking. In North America, the Dakota sandstone provides aquifers for an artesian system that underlies parts of the Dakotas, Montana, Wyoming, Kansas, Nebraska, and Saskatchewan and supplies great quantities of water to the dry Great Plains region. Many East Coast cities derive their water supplies from aquifers that are exposed along the edge of the Piedmont and dip downward toward the Atlantic coast. The largest artesian system in the world underlies nearly all of E and S Australia. Other important artesian systems serve London, Paris, and E Algeria.
The Columbia Electronic Encyclopedia, 2007
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