THE ARTESIAN WATER SUPPLY OF EASTERN FLORIDA. 
171 
artesian water at a comparatively shallow depth, the average being 
from 125 to 200 feet. Bordering Lakes Monroe and Jessup 
and the St. Johns River the wells are more shallow and terminate 
at a depth of from 66 to 85 feet. 
The first flow in the wells at Sanford is encountered at a depth 
of from 100 to 125 feet, after drilling through a rock more or less 
hard and penetrating the characteristic “water rock” or the Vicks¬ 
burg Limestone. In some instances a light flow is obtained above 
this harder rock immediately overlying the Vicksburg. When such 
is the case it seems the water comes from a quicksand or some¬ 
times from a stratum of sand and shell. In order to get a sufficient 
and permanent flow, however, the boring is continued until the 
Vicksburg Limestone is reached. 
In a well owned by Mr. L. E. Morrow, four miles south of San¬ 
ford on the Sanford-Orlando public road and drilled by Mr. W. E. 
Holmes in April, 1910, the Vicksburg Limestone was reached at 
a depth of 113 feet. The first flow was obtained at a depth of no 
feet, coming from a light yellow sand. The following is an 
approximate log of this well constructed from notes given by the 
driller and from a partial set of samples kindly saved by him: 
Feet. 
Surface soil ...... 0- 5 
Yellow sand ..... 5- 40 
Shell and sand, water, no flow. 40- 60 
Sand . 60- 91 
Shell and sand with sharks’ teeth. 91- 95 
Dark blue rock with black phosphatic pebbles. 95-100 
Very hard rock .100-101 
Light yellow sand...101-113 
Vicksburg Limestone . .113- 
The principal supply of water for the city of Sanford is drawn 
from Lake Ada about four miles southeast of the city. The soft 
water from the lake is preferred to the hard sulphuretted artesian 
water. However, the city has four artesian wells, which serve as 
a source of supply when the lake is low. These wells are all four 
inches in diameter and are reported to have an average depth of 
130 feet. Measurements in regard to the volume of flow of these 
wells could not be obtained. 
Several flowing wells occur at Cameron City on Lake Jessup, 
about six miles southeast of Sanford. The wells here are of about 
the same depth of those in and near Sanford and good flows are 
obtained. The principal use of the water is for irrigating purposes. 
