An artesian well is 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.
Whenever I visit the well in my area I bring a gallon jug to fill it up with the clean, cold drinking water. I have posted a picture of this well, it is located on the north side of Lake Como in Walworth county Wisconsin.
This cache is only for artesian wells, please do not log artesian springs as they are much more common.
To receive credit for this cache you must post a picture of the well with your GPSR and the coordinates of the well. The artesian well must be active, and water must be flowing from the well. If the well is located on private property, and you have permission to visit the well, you can email me the coordinates if you don't want to post them. For the convenience of myself and others reading the log, please reserve the first line of your log solely for the location of the well.
As artesian wells are unique and rare places, multiple logs of the same well are permitted, as long are you post unique pictues.
Happy hunting, thirsty geocachers!