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This file contains hydrologic unit boundaries and codes for the Lake
Michigan basin. It was revised for inclusion in the National Atlas
of the United States of America, and updated to match the streams file
created by the USGS National Mapping Division (NMD) for the National
Atlas of the United States of America. This is a revised version of the
January 2002 data set.
Data Provided By:
Great Lakes Geographic Information System, United States Geological Survey
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