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A map of the locations from which fish were sampled from a 400-ft section of the river, often on both the left and right sides of the main-channel (two samples per site). Included is an inset denoting major rivers, cities, and states around Chicago. Locations in close proximity were lumped into a waterway grouping (i.e., WW_112, WW_36, and WW_37 for NorthShore Channel; WW_76 and WW_41 for Chicago Sanitary and Ship Canal) for analysis.
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