WELLS OF PUTNAM COUNTY, ILLINOIS. 

 Table of deep toells in Bureau County — Continued. 



633 



PUTNAM COUNTY. 



GENERAL STATEMENT. 



Putnam County is situated southeast of Bureau, immediately south of 

 the great bend of the Illinois, and is traversed in a southward course by that 

 stream. It is one of the smallest counties in the State, its area being but 

 170 square miles, and Hennepin is its county seat. The county is situated 

 mainly east of the Illinois River, there being scarcely 50 square miles on 

 the west side of the stream. The valley of the Illinois River in this county 

 has a width of about 5 miles. The remainder of the county is an upland 

 standing 200 to 300 feet above the level of the river. The most elevated 

 part is on the eastern border near Mount Palatine, where an altitude of 725 

 to 750 feet is attained. 



Throughout the county there is a heavy deposit of drift, averaging 

 fully 150 feet in thickness. The upper portion on the uplands to a depth of 

 75 or 100 feet is mainly bowlder clay, but the lower portion, and nearly all 

 the drift in the valley of the Illinois, is sand and gravel. The list of deep 

 wells presented below was furnished by Prof. J. A. Udden, with the exception 

 of the artesian well at Hennepin, data concerning which were furnished by 

 A. T. Purviance, county clerk. 



