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Region
- Washington (State)4
- ArizonaTucson2
- Louisiana2
- LouisianaLafayette Parish2
- Red River (Tex.-La.)2
- United States2
- UtahSalt Lake County2
- AlaskaAnchorage1
- ArizonaMaricopa County1
- ArizonaVerde River1
- Arkansas River1
- Arkansas River Valley1
- CaliforniaSacramento River Watershed1
- Columbia River1
- FloridaDaytona Beach1
- FloridaLake County1
- HawaiiOahu1
- IdahoPayette River Watershed1
- Illinois1
- IllinoisAmerican Bottom1