place. In a zone along the Miami Canal where salt water might sometime penetrate if regulation of the canal is not practiced it probably would be unsafe to develop a field. In this seven mile wide area there is sufficient depth of permeable aquifer and satisfactory quality and quantity of water to supply any foreseen population growth of the Miami area.
North and south of metropolitan Miami the coastal ridge is underlain by about 100 feet of highly permeable rock similar to that in which the present wells of the municipal supply are developed. The ground water, except that in a zone about 8,000 feet inland from the Bay and in tongues following under and along the drainage canals which at times carry salty water, is of excellent quality, can be obtained in large quantities, and is usually lower in color and hardness than the ground waters of the ,Everglades,
To the south of Miami along the Coastal Ridge, very large supplies (thirty millions of gallons per day or more) could be developed, but to be safe from salt water encroachment should be located a mile or more away from the larger drainage canals, and in no case should be nearer than 3 miles to the Bay. (see plate 9). In general, such large supplies could be developed almost anywhere west of Red Road and southward along U. S. Highway 1, on the western side, at least to Peters. Beyond Peters the area between the Bay and U. S. Highway 1 is much wider than to the north and becomes wider with greater distance to the south. Supplies can be developed east of Homestead for a distance of several miles, but the presence of drainage canals in this area must always be borne in- mind and locations made accordingly. However, if a large supply were to be developed south of Peters it would be better to choose a site along or west of U. S. Highway 1, not east of it.r