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- Roads[remove]4
- Lakes & ponds3
- Automobiles2
- Rocks2
- Trees2
- Black Canyon (Ariz. and Nev.)1
- Bodies of water1
- Boulder Canyon (Ariz. and Nev.)1
- Cliffs1
- Coastlines1
- Dams1
- Donner Lake (Calif.)1
- Donner Summit (Calif.)1
- Dwellings1
- Electric lines1
- Hoover Dam (Ariz. and Nev.)1
- Horseless Carriage Club of America1
- Hydraulic facilities1
- Hydroelectric generators1
- Mountains1