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DESCRIPTION:

Latitude 41°40'33",   Longitude 87°59'59"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120004

Well depth: 1493 feet
Hole depth: 2284 feet
Land surface altitude: 596.1 feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1923-12-05	1985-11-12	8
Field/Lab water-quality samples	1923-12-05	1985-11-12	5
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