Links
MLRA polygons downloaded from https://www.nrcs.usda.gov/sites/default/files/2022-10/MLRA_52_2022.zip
Watershed polygons downloaded from https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Hydrography/WBD/National/GDB/
County polygons downloaded from https://www2.census.gov/geo/tiger/GENZ2021/gdb/cb_2021_us_all_500k.zip