WATER SUPPLY OF EASTERN AND SOUTHERN FLORIDA. 197 
owned by E. E. Campbell. This well was drilled by Frank Bart¬ 
lett in 1909 and reached a total depth of 352 feet. It is reported 
as having 95 feet of four-inch casing. The head of this well was 
measured December 11, 1909. The water was found to stand at 
this time 7J4 feet below the surface. 
Well No. 2 is located one mile west of Yelvington depot. It 
is a four-inch well and is owned by Campbell & Killingsworth. 
This well was drilled in 1907 by S. I. Killingsworth and is re¬ 
ported to be 300 feet deep and cased 180 feet. The water is said 
to stand two feet below the surface. 
CLAY COUNTY. 
LOCATION AND SURFACE FEATURES. 
Clay County has a varied topography. The eastern portion, 
bordering the St. Johns River, is low and flat and consists largely 
of open pine woods. Extending westward from the river the 
elevation rises and the country becomes more rolling. The county 
is intersected by a number of streams, the largest of which is 
Black 'Creek, a tributary to the St. Johns River. This stream is 
navigable for small boats to or above Middleburg, at which point 
it divides, forming the north and south forks. The north fork 
rises in Lake Kingsley, and with its tributaries drains the north¬ 
western part of the county. The south fork rises in Blue Pond 
and other lakes and drains the central part of the county. In the 
southwestern part of the county many small lakes occur. 
The elevations in this county have been obtained from the 
levels made by the railroads crossing the county, including the 
Seaboard Air Line, the Atlantic Coast Line and the Georgia 
Southern and Florida Railway. In addition levels made during 
1909 by the U. S. engineers in connection with a preliminary 
survey for a ship canal have been available. These levels show 
that the water level in Lake Kingsley stood at the time the levels 
were made 170 feet above sea. The measurements of depth show 
that this lake averages 58 to 60 feet, although one place was found 
at which the depth exceeded 78 feet, the full length of the sound- 
