DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY

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, .. EXPLANATION

LIMIT OF AQUIFER

WELL ANO WELL NUMBER

SUBSURFACE CONTOUR -- Show.s altitude of top of Castle Hayne aquifer. Dashed whe·re approximately located. Contour interval 100 feet. Datum is sea level

4

LINE OF EQUAL CHLORIDE CONCENTRATION -- Shows approximately where water at bottom of aquifer contains 250 milligrams per liter chlo.ride

LINE OF EQUAL CHLORIDE CONCENTRAT1ON -- Shows approximately where water at top of aquifer contains 250 milligrams per liter chloride

TRANSITION ZONE FROM FRESHWATER TO WATER CONTAINING 250 MILLIGRAMS PER LITER CHLORIDE

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ALTITUDE OF THE TOP OF THE CASTLE HAYNE AQUIFER

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OPEN-FILE REPORT 87-69.0 PLATE 24

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UNITED STATES DEPARTMENT OF THE INTERIOR

GEOLOGICAL SURVEY

SOURCE DATA

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POPULATION KEY

CHARLOTTE ASHEVILLE.. Greenville ..

•.•. 1'!10" ti••" 100 000 .....• $0.000 to 100,000

...... _ ... 10.000 ~ 50..000 • ••. 2.SOO lfl 10,tXIO

..... 1'1H2.500