DARTON. 
MARYLAND. 151 
the water-bearing beds rise from below tide-water level along a line 
from Nottingham to Herring Bay. This water may be expected to flow 
several feet above tide level, but of course it will be far below the surface 
on the higher lands back from the bay or river. There are probably 
other water horizons below the one just described, notably the Magothy 
horizon, which may be expected at moderate depths (300 to 400 feet) 
below tide level in the northern part of the county. It is not known 
whether the Pamunkey or basal Pamunkey waters underlie the county, 
but if they do they should be looked for midway between the basal 
Chesapeake and Magothy horizons. 
ST. MARY COUNTY. 
The conditions in this county are almost precisely similar to those in 
Calvert County, except that the water horizons are from 75 to 100 feet 
deeper at Point Lookout than at Drum Point. The wells at Leonard- 
town found the basal Chesapeake waters at a depth of about 200 feet, 
and at Piney Point and St. George Island they are 270 feet below tide 
level. The dip to the southeast carries the water 30 feet deeper at St. 
Inigoes. The well at "Jutland" is said to be 365 feet deep and one at 
Cornfield Harbor is 360 feet. The water found at 237 feet at Chapel 
Point in Charles County may extend into St. Mary, but no wells have 
yet been sunk to it. 
CHARLES COUNTY. 
In the western portion of the county waters may be expected in the 
basal beds of the Potomac formation at a depth of about 500 feet below 
tide level. The well at Quantico, on the west side of the Potomac 
River, obtained a good supply from this horizon at a depth of 210 feet, 
and the water rose considerably above tide- level. There also are 
waters at higher horizons in the Potomac formation, as indicated by 
the successful well at Barrow, in Virginia, which reached them at a 
depth of 143 feet, and the well at Indian Head at 459 feet. In the 
extreme eastern and southern portions of the county this water is at a 
depth of about 500 feet, and the water in the basal Potomac is about 
300 feet deeper. The water found at Nanjemoy at 175 feet, at Chapel 
Point at a depth of 237 feet, and at Rock Point Landing at 275 feet 
probably extends widely under the central and eastern portions of the 
county, but its extent is not yet fully determined. The waters in basal 
Chesapeake beds may be expected at a depth of about 100 feet near the 
eastern border of the county, but they were not in useful amount in 
the well at Rock Point Landing. 
PRINCE GEORGE COUNTY. 
In the northern portion of this county the water at the base of the 
Potomac formation will be found to be available over a wide area. 
Along the line of the Baltimore and Ohio Railroad this water horizon is 
about at tide level, and along the line of the Baltimore and Potomac 
Railroad it is about 350 feet lower. The well at Bowie, Avhich was 
