GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
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134 <strong>GROUND</strong> <strong>WATER</strong> <strong>IN</strong> <strong>NORTH</strong>-<strong>CENTRAL</strong> <strong>TENNESSEE</strong><br />
Leipers and Catheys formations. Some perennial tubular springs also<br />
exist in the limestones of this part of the county, particularly in the<br />
Hermitage formation in the vicinity of Nashville. Most of these<br />
springs, however, discharge only a few gallons of water a minute in<br />
the dry season and in general are much less reliable than the springs<br />
of the Highland Rim escarpment. No potable water has been found<br />
at depths exceeding 200 feet except in a very few wells, and hence<br />
deep drilling for water is not generally advisable. In well 313, for<br />
example, no water-bearing beds were penetrated below a depth of 101<br />
feet to a depth of 409 feet, even though the well is on the crest of a<br />
ridge about 300 feet high. The few deep wells that have been drilled<br />
Nos. 295, 298, 299, and 303 pass through the deepest beds that<br />
carry fresh water less than 200 feet below the surface; below these<br />
beds they penetrate only dense limestone to the St. Peter (?) sandstone<br />
at a depth of about 1,100 feet. The St. Peter (?) sandstone, however,<br />
contains water that is too highly concentrated to be satisfactory for<br />
many uses, as is shown by analyses 295 and 298 (pp. 114-115).<br />
The static level of the water carried by the St. Peter (?) sandstone<br />
is about 510 feet above sea level in the vicinity of Nashville, so that<br />
flowing wells, such as Nos. 295 and 298, can be obtained in the lower<br />
land along the Cumberland River. However, the specific capacity of<br />
the wells seems to be rather small.<br />
Descriptive data for typical wells and springs in Davidson County<br />
are tabulated on the following pages, and the driller's record of the<br />
strata penetrated by well 295 is given on page 59. The chemical<br />
character of the ground waters is shown by representative analyses<br />
tabulated on pages 114-117.