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DESCRIPTION:

Latitude 42°04'10",   Longitude 87°57'11"   NAD27
Cook County, Illinois   , Hydrologic Unit 07120004

Well depth: 1950 feet
Hole depth: 1950 feet
Land surface altitude: 693.00 feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Devonian-Silurian System" (340DVSL) local aquifer

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Field groundwater-level measurements	1949-08-11	1949-08-11	1
Field/Lab water-quality samples	1951-04-15	1983-04-06	6
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