634 



THE ILLINOIS GLACIAL LOBE. 



INDIVIDUAL WELLS. 



The Hennepin artesian well is 800 feet in depth and has a head sufficient 

 to carry the water at least 50 feet above the surface. It has a discharge of 

 80 gallons per minute from a 4-inch pipe. There is a slight salinity, but 

 the water is not unpleasant to the taste. The well is cased nearly to the 

 bottom and the water has a temperature of 58° F. The drift is about 150 

 feet in thickness. The altitude of the well being scarcely 500 feet, the 

 rock floor is but 350 feet above tide, or nearly as low as at the wells in 

 Princeton and Bureau Junction. 



The Putnam City artesian well obtains water from the Coal Measures, 

 but the depth was not ascertained. It penetrated about 200 feet of drift, 

 and entered rock at a level slightly below 350 feet above tide. 



Table of wells in Putnam County, by Prof. J. A. Udden. 



