WELLS OF SHELBY COUNTY, ILLINOIS. 739 



The Manual of American Waterworks, 1897, reports that the public 

 water supply at Moweaqua is obtained from wells, but the depth is not 

 given. 



At Tower Hill a coal boring enters rock at 60 feet. Drift knolls in 

 this village rise about 60 or 75 feet above the level of the ground at the 

 point where this boring was made. The wells in the vicinity of Tower 

 Hill are usually obtained at 20 feet or less, from beds of sand)" clay over- 

 lying a hard blue till. 



The public water supply at Shelbyville is pumped from the Kaskaskia 

 River. Wells are usually obtained at depths of 30 to 50 feet from sand 

 below till; in some cases they are obtained at the base of the Wisconsin 

 drift. 



At Cowden, near the south border of the county, wells are usually 

 obtained at about 20 feet, just above the hard blue till. Rock is struck at 

 40 or 50 feet An exposure on the Kaskaskia bluffs, near Cowden, has the 

 following section : 



Section of bluffs of Kaskaskia River, near Cowden, Illinois. 



Feet. 



Whi te clay 5 



Yellow clay with a few pebbles 3 



Reddish-brown sandy till 6-8 



Yellow till, blue in places 10-15 



Hard blue till 20 



Coal Measures shale at base of bluff. 



Total drift ; 15 



At Stewardson, in the southeast part of the county, wells are usually 

 obtained at 20 to 40 feet without entering rock, and similar conditions occur 

 at Strasburg. 



At the village of Windsor, which is located on the Shelbyville moraine, 

 the village well penetrates 90 feet of soft till, apparently belonging to the 

 Wisconsin drift, beneath which there is a harder till with sandy matrix. 

 Water was obtained in sand at a depth of 127 feet. Several prospect bor- 

 ings have been made by Mr. Jerry Linnville at this village, which have 

 reached depths ranging from 120 to 170 feet without entering rock. Gras 

 was found in sand at 115 to 120 feet, and beneath this at about 135 feet a 

 black muck was penetrated. Whether this muck was formed in a valley 

 bottom in a stage just before the Wisconsin drift was deposited or is sepa- 

 rated from the Wisconsin by a glacial deposit of greater age is not made 



