Hydrologic Unit Map-1974, State of Illinois

Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey

doi:10.3133/hu13

USGS · hu13

Hydrologic Unit Map-1974, State of Illinois

Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey

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Hydrologic Unit Report

Source-reported bounding extent: 36.970298° to 42.508302° latitude; -91.513079° to -87.496494° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey. 1975. Hydrologic Unit Map-1974, State of Illinois. https://doi.org/10.3133/hu13

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Hydrologic Unit Map-1974, State of Illinois

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