Wells formed by boring through upper soil to strata containing water which has percolated from a higher level.
and which rises to that level through the boring-tube.
The following are some of the deepest wells in the
United States:
| Location. | Depth. | Bored. | Remarks. |
| St. Louis, Mo | 2,197 ft. | 1849-52 | 108,000 gallons daily.
Salty. |
| St. Louis, Mo | 3,843 ft. | 1866-70 | Does not rise to the surface.
Salty. |
| Louisville, Ky, | 2,086 ft. | 1856-57 | 330,000 gallons daily.
Mineral. |
| Columbus, O. | 2,775 1/2 ft. | | Water saline, 91° Fahr.: no force |
| Charleston, S. C. | 1,250 ft. | 1848 | 28,800 gallons daily.
Saline. |
South Dakota, sometimes called the “Artesian State,” has many powerful artesian wells in the
valley of the James River, from 800 to 1,600 feet deep, affording a bountiful supply of pure water.
The water from great depths is always warmer than at the surface.
One of the most remarkable attempts to sink an artesian well in the United Slates was made in
Galveston, Tex. A depth of 3,070 feet and 9 inches was reached, without penetrating any rock or finding water.
After the contractors had reached a depth of 3,000 feet, which was the limit stipulated in their contract, they were paid $76,000, and the work was offically abandoned in 1892, the contractors carrying the work a few feet further as a matter of curiosity.
See
irrigation.
Arthur, Chester Alan 
