WELLS OF COOK COUNTY, ILLINOIS. 587 



At Arlington Heights a well drilled to a depth of 800 feet penetrates 

 128 feet of drift. No further data concerning the well were obtained. A 

 well in this village penetrated a black soil beneath blue till at a depth of 70 

 to 75 feet, beneath which it entered another sheet of till. A well 2£ miles 

 north of Arlington Heights entered rock at a depth of 195 feet. 



At Des Plaines Village, which is situated on a gravelly plain, wells 

 penetrate about 12 feet of gravel before entering till. Some obtain their 

 supply in this gravel, others from gravel associated with the till. The 

 depth seldom exceeds 30 feet. The public supply is from an 8-inch well 

 200 feet in depth. 1 



A well on the farm of John Back, near Schermerville, 162 feet in 

 depth, enters rock at 147 feet. In the village of Schermerville wells are 

 often 60 feet, and in some instances over 100 feet in depth, and obtain water 

 from gravel beneath the till. 



At the village of Oak Glen several flowing wells have obtained water 

 either near the base of the drift or in the upper part of the underlying 

 limestone at depths of 90 to 120 feet. Mr. F. N. Hoffman's well, 118 feet in 

 depth, struck one water vein in gravel at 78 to 80 feet and another at the 

 top of the limestone at 114 to 118 feet. Water in this well rises 4 feet 

 above the surface. A well near Oak Grlen, in sec. 25, 160 feet in depth, 

 does not reach rock, though its mouth is scarcely 60 feet above Lake 

 Michigan. 



At Park Ridge, at an altitude 660 feet above tide, an artesian well 

 enters rock at 103 feet. The drift is mainly till. No further data were 

 obtained. A well about 3 miles north of Park Ridge at slightly higher 

 altitude enters rock at 110 feet. 



At Winnetka, at the residence of Mr. Lloyd, a well 1,570 feet in depth 

 enters rock at 150 feet. The water rises to a level nearly 40 feet above 

 Lake Michigan. Wells are obtained in this village at depths of 20 to 50 

 feet in beds of gravel associated with the till. 



At Wilmette rock is entered at about 140 feet, or nearly 100 feet below 

 the level of Lake Michigan. A deep well has a head about 20 feet above 

 the lake level. No further data were obtained. 



An artesian well at Evanston, 1,602 feet in depth, enters rock at 72 

 feet, or about 42 feet below the level of Lake Michigan. Water rises to a 



1 Manual of American Waterworks, 1897. 



