Latitude 41°30'00", Longitude 87°31'30" NAD27
Cook County, Illinois , Hydrologic Unit 07120003
Well depth: not determined. Land surface altitude: 625
feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer