182 FLORIDA GEOLOGICAL SURVEY—THIRD ANNUAL REPORT. 
well, as determined by measurement, is sixteen feet above Lake 
George. The well on April 25, 1910, as indicated by the pressure 
gauge, had a pressure of four and one quarter pounds, equivalent 
to a head of 9.8 feet above the surface or 25.8 feet above the level 
of the water in Lake George. The first flowing water was reported 
at the depth of 80 feet, at which depth hard rock was encountered. 
BREVARD COUNTY. 
LOCATION AND SURFACE FEATURES. 
Brevard County lies mostly between the St. Johns River and the 
Atlantic Ocean. It has a total length of 66 miles and including Mer¬ 
ritt’s Island, is about 25 miles wide. It joins Volusia County on 
the north and St. Lucie County on the south. Aside from the line 
of sand dunes running parallel with the coast this county is pre¬ 
vailingly of the palmetto flat woods type of country, although 
extensive prairie and muck lands occur in the interior of the county. 
Lake Washington in the central part of this county has an dera¬ 
tion of 15.74 f ee t while Lake Wilmington, the head waters of the 
St. Johns River in St. Lucie County, has an elevation of 23.37 feet 
above mean sea level at Indian River Inlet.* 
WATER-BEARING FORMATIONS. 
The deep wells in Brevard County enter the Vicksburg Lime¬ 
stone. At Melbourne this limestone, as indicated by well sam¬ 
ples kept from the well of Mr. Oliver Gibbs, was reached at the 
depth of 221 feet. At Cocoa in the well of Mr. H. Bradford, the 
Vicksburg Limestone was recognized at. a depth not exceeding 190 
feet. 
AREA OF ARTESIAN FLOW IN BREVARD COUNTY. 
Although the interior of this county is but thinly settled and but 
few wells have been put down, it is probable that the greater part of 
this county lies within the area of artesian flow. On the high sand 
dune ridge which lies out three or four miles from the coast a slow 
is not to be expected. This is probably also true of points within 
the interior of the county, particularly in the southwestern pari. 
*Survey made in 1903, under the direction of Captain F. R. Shunk, U. b. 
Army. 
