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Region
- United States6
- Louisiana4
- Washington (State)4
- Indiana3
- ArizonaTucson2
- Grand Calumet River Watershed (Ind. and Ill.)2
- LouisianaLafayette Parish2
- MinnesotaRamsey County2
- MontanaPark County2
- Nevada2
- Red River (Tex.-La.)2
- TennesseeMemphis Region2
- UtahSalt Lake County2
- AlaskaAnchorage1
- ArizonaMaricopa County1
- ArizonaVerde River1
- Arkansas River1
- Arkansas River Valley1
- CaliforniaSacramento River Watershed1
- ColoradoFrench Gulch1