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Region
- GeorgiaAlbany2
- KentuckyKentucky River Watershed2
- South Dakota2
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- Corwin Springs (Mont.)1
- FloridaCharlotte Harbor (Bay)1
- GeorgiaAlbany Region1
- Gulf Coast (U.S.)1
- Kansas1
- Kentucky River (Ky.)1
- Minnesota1
- Minnesota River (S.D. and Minn.)1
- MontanaCorwin Springs1
- Nebraska1
- New MexicoCibola County1
- New MexicoMcKinley County1
- New MexicoZuni1
- North CarolinaGuilford County1
- North Dakota1
- Oregon1