WATER SUPPLY OF EASTERN AND SOUTHERN FLORIDA. 195 
Several wells have been drilled at St. Augustine to supply 
water to the Ponce de Peon and other hotels of the Florida East 
Coast Hotel Company. One of these, commonly known as the 
Ponce de Leon well, reached a total depth of 1,440 feet, and is 
the deepest well in St. Johns County. The following log of this 
well has been made up from records kindly supplied by Messrs. 
McGuire & McDonald, under whose direction the well was 
drilled, supplemented by a partial set of samples from the boring. 
The original intention was to go to a depth of about 3,000 feet 
:'n the expectation of obtaining warm water. The well was begun 
November 27, 1886, and drilling continued until February 24 
of the following year. Owing to delay caused by the loss of the 
drill, boring was finally discontinued at the depth of about 1,440 
feet. 
Feet. 
Sand. Temperature’ of the water at 35 feet, 
60 degrees F. 
0 - 
35 
Sand, with some shell. 
35- 
50 
Blue clay. 
50- 
57 
Shell . 
57- 
65 
Sand . 
65- 
76 
Indurated clay and sand. 
76- 
95 
Blue clay and black sand, pieces of hard 
stone. Tern- 
perature of the water 72 degrees at 
110 feet, 74 
degrees at 170 feet. Head 32 feet above sea. Sul¬ 
phur water, 50 gallons per minute at 170 feet. 95- 170 
Hard rock. Temperature of water 76 degrees at 177 
feet. Flow 350 gallons per minute at 177 feet. 170- 177 
Limestone. Flow 1,800 gallons per minute at 350 feet.. 177- 350 
Limestone. Temperature of water 76 degrees at 410 
feet. Flow of 2,083 gallons per minute’ at 410 feet.. 350- 410 
Limestone . 410- 495 
Dense light brown limestone. Temperature of water 79 
degrees at 520 feet. Head 42 feet above sea at 520 
feet. Flow of 4,860 gallons per minute at 520 feet.. 495- 520 
White “chalk,” green clay, dark porous limestone. 520- 557 
Limestone .. 557- 675 
Hard rock . 675- 685 
Limestone . 685- 770 
Limestone, gray to light yellow. 770- 960 
Thin stratum of hard limestone, followed by limestone 
similar to above. Temperature of water 80 degrees 
