Region
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Boston (Mass.)
1
Botswana
1
Breezy Point (New York, N.Y.)
1
Broward County
1
Buffalo Creek
3
Buffalo Creek (Logan County)
5
Cache la Poudre River Watershed
1
Cairo
1
Cairo (Ill.)
1
California
28
California, Northern
1
California, Southern
3
Canada
2
Canadian River
1
Caribbean Area
1
Cascade Lake Dam
1
Cascade Lake Dam (Colo.)
1
Castle Lake (Cowlitz County, Wash.)
1
Catawba River
1
Catawba River (N.C. and S.C.)
1
Catskill Mountains
1
Cedar River (Minn. and Iowa)
1
Central America
1
Central Valley
3
Champlain, Lake
1
Champlain, Lake, Watershed
1
Charlotte
1
Chautauqua County
1
Cheat River Watershed
1
Cheat River Watershed (W. Va. and Pa.)
1
Chehalis
1
Chehalis (Wash.)
1
Chehalis River Watershed
1
Chelan County
1
Cheyenne
1
Cheyenne Region
1
Chiapas
2
Chiapas (Mexico)
1
Chicago
2
China
7
Clallam County
1
Clifton
1
Coffee County
1
Colombia
1
Colorado
11
Colorado River
2
Colorado River (Colo.-Mexico)
4
Columbia
1
Columbia Plateau
1
Columbia River
2
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