WELLS OF WHITESIDE COUNTY, ILLINOIS. 



617 



and has an estimated capacity of 350 gallons per minute. An analysis is 

 given in the Seventeenth Annual Report of this Survey, 1 which shows it to 

 be a moderately hard water with very little salinity. Private wells in the 

 vicinity of Sterling range in depth from 25 to 100 feet, with an average 

 about 35 feet. Only the shallowest ones are obtained in gravel, the 

 remainder being from limestone. 



In the vicinity of Prophetstown wells are usually obtained at less than 

 50 feet without entering rock and are mainly through gravel. A short dis- 

 tance northwest from Prophetstown, on the north side of Rock River, rock 

 is found at slight depth and it occasionally outcrops. But east from 

 Prophetstown as far as the county limits (16 miles) no records of wells 

 reaching- rock were obtained. 



In T. 20, R. 3 E., which is situated near the western border of the 

 county, the following sections of deep wells were obtained: 



Wells in T. 20, R. 3 E., Whiteside County, Illinois. 



In the vicinity of Erie wells reach a depth of about 40 feet without 

 entering rock. The majority obtain water at 20 or 30 feet. They are 

 mainly through a fine sand. A well in section 3 of this township, 47 feet 



1 Part II, p. 828. 



