566 



THE ILLINOIS GLACIAL LOBE. 



At Warren and in that vicinity the best wells are 50 to 150 feet deep 

 and obtain water from the Galena limestone. The altitude being high 

 (about 1,000 feet above tide), the water level in the wells is so low that 

 windmills are usually employed to raise the water. A large proportion of 

 the residents of the village depend upon cistern water. The Manual of 

 American Waterworks (1897) reports that a well has recently been sunk 

 to a depth of 900 feet which furnishes the public water supply. 



No data were obtained concerning wells in other villages of the county, 

 but a few records were obtained of wells in the glaciated portion between 

 Stockton and Nora. These usually enter rock at 20 to 30 feet, but occa- 

 sionally the drift is thicker. In the preglacial valley referred to above, 

 which passes in an east-west course midway between these villages, several 

 well records were obtained which are tabulated below: 



Wells in a preglacial valley north of Stockton. 



Altitude 

 (above tide) 



Head from surface. 



Mr. Keplinger 



A. A. Simmons 



Andrew Simmons... 



Charles Kappas 



Theodore Hopkins.. 



W. Legrand 



Mrs. M. L. Crouse . . . 

 Mrs. M. L. Crouse. . . 



G. W. Curtis 



Frank Weighers 



Mrs. Emily Ooomler 



M. Werkheiser 



Richard Oliver 



Feet. 

 930 

 950 

 950 

 950 

 940 

 940 

 940 

 930 

 950 

 935 

 970 

 970 

 970 



Feet. 

 50 

 72 

 77 

 105 

 134 

 135 

 40 

 140 

 96 



no 



135 



85 

 60 



Overflows. 

 10 feet below. 

 10 feet below. 

 10 feet below. 

 3 feet below. 

 3 feet below. 

 Overflows. 

 Overflows. 

 15 feet below. 

 10 feet below. 

 35 feet below. 

 35 feet below. 

 35 feet below. 



The majority of the wells in the above list penetrate 50 to 70 feet 

 of compact clay before entering a water-bearing bed, and at Mrs. Crouse's 

 deeper well 130 feet of clay was penetrated. The last three wells in the 

 list are situated on a low drift ridge and their sections show a larger propor- 

 tion of gravel and sand than the wells on the plane surface. The strong 

 hydrostatic pressure probably results from an absorption of water on the 

 neighboring higher land. None of the wells in this list entered rock, 



