144 FLORIDA GEOLOGICAL SURVEY—FOURTH ANNUAL REPORT. 
DRAINAGE. 
rivers with their several tributary streams carry off the surface 
drainage. Aside from the drainage by surface streams this county 
has a well defined system of underground drainage. Lake Micco 
sukee occasionally becomes dry, the water passing off through the 
sink near the northwest corner. The principal surface outlet of 
this lake is through a small stream near the south end of the lake. 
Tliis stream likewise enters a sink about two miles south of the 
lake. Mill Creek, which flows in from the south, disappears through 
a sink only a short distance from the one into which the stream 
from Lake Miccosukee drains. In seasons of heavy rainfall when 
these sinks are unable to carry off all water the two streams over 
tiow into the St. Marks Itiver on the southwest. 
ARTESIAN WELLS. 
Flowing artesian wells have not been obtained in Jefferson 
county. The deep wells of the northern part of the county are oi 
the class of non-flowing artesian wells. In the southern part of 
the county where the surface elevation is reduced it is possible 
that a flow could be obtained from a depth of several hundred feet, 
although no test well has been drilled. The water from flowing 
wells if obtained along the Gulf coast of this county would probably 
be relatively high in mineral constituents. 
LOCAL "DETAILS. 
AUCILLA. 
There are no deep wells at Aucilla. The surface formation here 
includes‘sand and sandy clays. Surface wells from JO to 40 feet 
deep terminate in these sandy clays and furnish an ample supply 
for all general purposes. 
LAMONT. 
Lamont is in east-central Jefferson county near the Aucilla 
Liver. Open dug wells ranging in depth from 20 to 30 feet are 
common at this locality. Wells of this depth furnish a good supply 
of soft water which is found in a sandy clay formation. There is 
one deep well here, however, which terminates in a limestone at a 
depth of 132| feet. The limestone was encountered at the depth 
of 129 feet. This well is two inches in diameter and is cased to 
the rock. It was drilled by G. P. Payne in 1908. The water rises 
to within 13 feet of the surface. 
