Latitude 41°35'20", Longitude 87°53'00" NAD27
Cook County, Illinois , Hydrologic Unit 07120004
Well depth: 475 feet Hole depth: 475 feet
Land surface altitude: 690
feet above NGVD29.
Well completed in "Silurian-Devonian aquifers" (N400SLRDVN) national aquifer.
Well completed in "Silurian System" (350SLRN) local aquifer