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Region
- Death Valley (Calif. and Nev.)3
- Delaware River Watershed (N.Y.-Del. and N.J.)3
- California2
- Chagrin River (Ohio)2
- Idaho2
- Nevada2
- New York (State)Long Island2
- Ohio2
- OhioChagrin River2
- UtahGreat Salt Lake Watershed2
- Wyoming2
- Atlantic Coast (New England)1
- CaliforniaRiverside County1
- Chaco Culture National Historical Park (N.M.)1
- ColoradoBlack Gore Creek1
- ColoradoGore Creek (Eagle County)1
- Columbia River1
- Connecticut1
- Detroit River (Mich. and Ont.)1
- FloridaCypress Creek1