27     0401 Western Lake Superior
27     0402 Southern Lake Superior-Lake Superior
27     0701 Mississippi Headwaters
27     0702 The Minnesota River Basin
27     0703 The St. Croix River Basin
27     0704 Upper Mississippi-Black-Root
27     0706 Upper Mississippi-Maquoketa-Plum
27     0708 Upper Mississippi-Iowa-Skunk-Wapsipinicon
27     0710 The Des Moines River Basin
27     0902 The Red River Basin
27     0903 The Rainy River Basin
27     1017 Missouri-Big Sioux
27     1023 Missouri-Little Sioux