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- UFOs (1)
- UMW March on Charleston (1)
- UMWA display (2)
- UMWA District 17 (1)
- UMWA history (2)
- UMWA Local 6608 Union Hall (22)
- UMWA local in former church (3)
- UMWA: 1980s demise of (1)
- Underground mining (3)
- Undevelopment (25)
- Union busting (5)
- "Union grub" (1)
- Union history (7)
- Union Local 1945 (1)
- Union Local 5770 (1)
- Union Local (9)
- Union organizers (2)
- Unionization (2)
- Unions (12)
- Union (44)
- United Mineworkers of America (UMWA) (21)
- University of Charleston (9)
- Unsettlement (1)
- Upper Big Branch Longwall Mine (2)
- Upper Big Branch Mine (13)
- Upper Big Branch (17)
- Upper Briar Hollow (2)
- Upper Jess Hollow (1)
- Uproots (2)
- Utensils, eating (1)