National Register of Historic Places
Black Diamond Mines
Antioch vicinity, Contra Costa County, California
The record
- Listed
- October 2, 1991
- Type
- Historic district
- Address
- Somersville Rd. SE of Antioch, Antioch vicinity
- County
- Contra Costa
- State
- California
- Period of significance
- 1850 to 1949
- Contributing resources
- 3 sites
- Coordinates
- 37.95754, -121.85921
- Reference number
- 91001425