1. Insurance maps of Waukegan, Lake County, Illinois, April 1900 Maps University Of Illinois Urbana Champaign Public content 1900. Sanborn Map Company. Scale 1:600. 50 ft. to 1 in. Unnumbered sheet 1 includes symbol key, index, and index map. Partial cadastral map. Fire insurance map hand colored t... Sanborn-Perris Map Co.