WELLS OF MENARD COUNTY, ILLINOIS. 709 



At Elkhart the drift is about 60 feet in depth, as follows: 

 Generalized section of drift at Elkhart, Illinois. 



Feet. 



Loess and slight) y pebbly clay — 12 



Black soil containing wood 3-6 



Yellow till..: - 5-10 



Bine till 30-35 



Records of several wells were obtained west from Elkhart which show 

 a section similar to the above and enter rock at about 60 feet. 



At Mount Pulaski the public water supply is from a well about 80 feet 

 in depth, which is mainly through a sandy drift. The village stands on a 

 knoll, about 40 feet above the bordering plain. On the plain near Mount 

 Pulaski a black mucky soil is penetrated below yellow clay at a depth of 

 16 or 18 feet, and wells are obtained at about 30 feet. A prospect boring 

 for coal on the plain near this village penetrated 92 feet of drift. 



MENARD COUNTY. 

 GENERAL STATEMENT. 



Menard County is situated in the central part of the State, immediately 

 west of Logan County and south of Mason County. It has an area of only 

 320 square miles, and Petersburg is the county seat. The county is trav- 

 ersed nearly centrally in a south-to-north direction by Sangamon River, 

 and this stream also forms a portion of the north boundary of the county. 

 The remainder of the north boundary is formed by Salt Creek, the princi- 

 pal tributary of Sangamon River. The county is well drained by these 

 streams and their tributaries, and has also a coating of loess which absorbs 

 the rainfall rapidly and returns it to the crops in seasons of drought. 



The drift has about the same constitution as in southwestern Logan 

 County, being largely a hard blue till. Its depth is seldom less than 60 

 feet, and probably averages at least 100 feet. Wells are usually obtained 

 at about 35 feet, though a few have been sunk to greater depths. Borings 

 for coal have tested the thickness of the drift at several points. 



INDIVIDUAL WELLS. 



The public water supply at Petersburg is obtained from four 8-inch 

 wells sunk to depths of 35 to 60 feet in the glacial drift. A coal shaft in 

 the Sangamon Valley, 2 miles north of this city and at about 65 feet lower 

 elevation, entered rock at 46 feet. 



