https://www.usgs.gov/data/umrr-hna-ii-201011-level-3-aquatic-areas-upper-mississippi-river-system
UMRR HNA-II 2010/11 Level 3 Aquatic Areas - Upper Mississippi River System | U.S. Geological Survey
The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) created high-resolution land cover/use data sets for the Upper Mississippi...