GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
214 <strong>GROUND</strong> <strong>WATER</strong> <strong>IN</strong> <strong>NORTH</strong>-<strong>CENTRAL</strong> <strong>TENNESSEE</strong><br />
Estimated minimum daily discharge of springs constituting municipal water supply<br />
at Franklin, Tenn.<br />
No. on<br />
Plate 4<br />
366<br />
379<br />
380<br />
381<br />
382<br />
383<br />
384<br />
384<br />
384<br />
386<br />
Name<br />
Stlllhouse Spring _______________<br />
Spring (11 springs).<br />
ner Springs (3 springs).<br />
Green Spring<br />
Goodjine Spring __________ .. _ .....<br />
Silver Spring _________________<br />
Location<br />
Dobbins Branch of Leipers Fork.....<br />
do .<br />
north branch of.<br />
.....do . . ..<br />
.....do . .............................<br />
.....do... ..............................<br />
.....do ................. ...........<br />
. __ do................... ...........<br />
.....do..... .... .............<br />
_do -. -. -<br />
... ..do ............ ...... ..........<br />
Garrison Branch of Leipers Fork,<br />
south branch of.<br />
. .do . ..... .......<br />
.....do . . ...... ........<br />
... . .do ....... . ... ..... .......<br />
.....do.... .<br />
Bally<br />
discharge<br />
(gallons)<br />
26,000<br />
40,000<br />
21,000<br />
16,000<br />
16,000<br />
3,000<br />
12,000<br />
8,000<br />
5,000<br />
8,000<br />
4,000<br />
21,000<br />
53,000<br />
8,000<br />
4,000<br />
29,000<br />
273,000<br />
This estimate, however, seems to be based upon measurements made in only<br />
one season, 1922, in which the surface-water and ground-water discharge in<br />
central Tennessee were much more than the average. For example, the run-off<br />
from the Cumberland River Basin above Nashville in the year ending September<br />
30, 1922, was 28.37 inches, whereas the average run-off in the 20-year period<br />
ending September 30, 1924, was 22.68 inches and the minimum run-off in the<br />
same period only 12.40 inches." Hence, the estimates tabulated above may<br />
be more than twice the minimum discharge of the springs in an unduly dry year.<br />
Each of the 36 springs that constitute the source is provided with a suitable<br />
cut-off box and discharge pipe connecting with an 8-inch cast-iron pipe which<br />
discharges by gravity into a 100,000-gallon steel standpipe and a 500,000-gallon<br />
covered concrete reservoir on a hillside about 2J4 miles southwest of Franklin<br />
and 130 feet above it. Distribution is effected by gravity, the maximum domestic<br />
pressure being about 50 pounds to the square inch. The average daily consump<br />
tion is reported to be about 125,000 gallons, to supply which the entire discharge<br />
of the source is utilized during the summer and autumn of unduly dry years.<br />
Hence, some addition to the supply will perhaps become imperative in dry years<br />
if the population of the city should increase. In view of the small tested capaci<br />
ties of wells drilled in the limestone in the vicinity of Franklin and of the inferior<br />
quality of the deeper ground water, it is not certain that a material addition to<br />
the supply can be obtained by drilling wells. Rather, such an addition should<br />
be sought first in other springs along the flank of Duck River Ridge and second<br />
in surface water from the Harpeth River or some of its tributaries.<br />
Hillsboro. Most of the residents of Hillsboro (formerly Leipers Fork; estimated<br />
population 375) derive their domestic water supplies from individual dug wells.<br />
One group of eight dwellings, however, is supplied from a small perennial spring<br />
through a distribution system owned and operated in cooperation by the residents.<br />
" Bang, W. R., Water resources of Tennessee: Tennessee Div. Geology Bull. 34, pp. 129-132,1925.