674 THE ILLINOIS GLACIAL LOBE. 



INDIVIDUAL WELLS. 



In the vicinity of Princeville, in the northern part of the county, wells 

 obtain water in limestone at depths of 20 to 50 feet, but at Monica, only 4 

 miles west, 100 feet of drift is penetrated, and at Dunlap, 6 miles southeast, 

 wells occasionally pass through 200 feet of drift. The drift appears to 

 have built up an eroded country to a level about even with the tops of the 

 rock ridges. Occasionally a rock ridge rises slightly above the general 

 level, an instance being found in sees. 4 and 5, T. 11, R. 7 E., about 4 

 miles northeast of Princeville, where the rock appears at the top of a ridge 

 standing 40 feet higher than Princeville Station. 



Records of several deep wells made near Dunlap and Alta have been 

 obtained from the driller, Mr. Alexander Lutcavish. In the village of Dun- 

 lap several wells obtain a strong supply of water at 110 to 112 feet without 

 entering- the rock. Nearly all the wells find a weak vein at 65 to 70 feet, 

 which is apparently at the base of the Wisconsin till sheet. Occasionally 

 strung wells are obtained at this depth. A well at Harrison Harlan's, 2 

 miles south of Dunlap, and at an altitude about 50 feet lower than the vil- 

 lage, obtains water from sand and gravel at a depth of 117 feet. It is 

 mainly through a stony blue clay. At William Rodgers's, 1£ miles west of 

 Dunlap, on the crest of the Shelbyville moraine, at an altitude about 50 

 feet above the village, a well reaches a depth of 150 feet without entering 

 rock. Another well at Mr. Powers's, also on the crest of the moraine, about 

 a mile south from Mr. Rodgers's, is of similar depth, and also fails to reach 

 rock. A well on "Jubilee Mound," about 5 miles west of Dunlap, 45 feet 

 in depth, passes through 30 feet of yellow till and then enters a veiy hard 

 bine till containing large bowlders. Blasting was necessary to remove this 

 blue till. This mound is outside the limits of the Wisconsin drift. Mr. 

 Lutcavish made a boring for John Holmes, sr., one mile east of Alta, which 

 reached a depth of 370 feet, and apparently did not strike rock. Its lower 

 portion was in a sand too fine to be screened by a pump strainer. A bed 

 of muck with wood and leaves was passed through at a depth of 245 to 247 

 feet. This well is near the crest of the main ridge of the Bloomington 

 morainic system, at an altitude nearly 400 feet above the Illinois River. 

 At the farm of John Holmes, jr., one-half mile west of Alta, a well was 

 obtained at a depth of 125 feet, which has 80 feet of water. Mr. William 



