Black Diamond Mines
Historic place
Black Diamond Mines is a historic place in Contra Costa County, California, listed on the National Register of Historic Places on 1991-10-02.
Place facts
- Category
- Historic place
- Resource type
- Historic district
- State
- California (CA)
- County
- Contra Costa County
- NRHP reference number
- 91001425
- Coordinates
- 37.95754, -121.85086
- Listed on the National Register
- 1991-10-02
- City
- Antioch
Location
Published coordinates: 37.95754, -121.85086. This point is calculated to fall on the mapped boundary below. It marks the resource, and it is not the centre or an address.
Sources
Every fact on this page comes from the registered datasets below, cited per claim and carried through an independently verified content release.
- Listing recordNational Park Service, nps.nrhp-listed (version 2026-05-22), NRHP reference 91001425
- CoordinatesNational Park Service, nps.nrhp-polygons-ca (version 2026-08-24), NRHP reference 91001425