^Illinois Atlas and Gazetteer. Freeport, Maine: DeLorme Mapping. 1991. ISBN0-89933-213-7.
^Lerczak, Thomas V. (n.d.). "Side Channel at Big Blue Island". theriverlanding.typepad.com. Side Channels. Retrieved January 6, 2018. Big Blue Island is in the lower Illinois River, about 58 miles upstream from the Mississippi River.