HathiTrust
Founded in 2008, HathiTrust is a not-for-profit collaborative of academic and research libraries preserving 17+ million digitized items. Contains many government documents and is a great source for finding information on the waters of Illinois. Items not restricted by copyright are available full text, and it is possible to search within documents to find mentions of a topic, even if the item is not available as full text. Simple and advanced searching is available for catalog records or full text. You can also search within a specific document for mentions of a topic. Item and page level permalinks are offered.