Latitude 41°29'00", Longitude 87°40'45" NAD27
Cook County, Illinois , Hydrologic Unit 07120004
Well depth: 345 feet Land surface altitude: 715
feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer