Latitude 41°28'41", Longitude 87°42'27" NAD27
Cook County, Illinois , Hydrologic Unit 07120003
Well depth: 0558 feet Land surface altitude: 730
feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer