Region
United States
5
Kansas
3
Northeastern States
2
Blue Ridge Mountains Region
1
Colorado
1
Colorado River (Colo.-Mexico)
1
Gunnison River Watershed
1
Illinois
1
James River (N.D. and S.D.)
1
Louisiana
1
Mississippi
1
Monongalia County
1
North Dakota
1
Powder River Basin (Wyo. and Mont.)
1
South Dakota
1
Tennessee
1
Washington (State)
1
West Virginia
1
Wyandotte County
1