Mine · Kern County, California, United States
Boron Operations
Boron Operations is a mine in Kern County, California, United States, owned by Rio Tinto Group.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Kern County | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Status | Operating (active) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Commodities | boron (mainly boron) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Owner | Rio Tinto Group (controls the operator) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Operator | U S Borax Inc | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Employees | 729 people (annual average, in 2025) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Mine type | Surface | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Coordinates | 35.0222, -117.7033 | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
Research on this mine and its owner.Who owns it up to the parent company, its permits, resources and offtake, and an introduction to the owner.
Request researchHow its owner compares
Rio Tinto Group owns 4 of the 2,675 mines in the United States in our data with a named owner; 99 owners have more. Counts cover the mines in our data that name an owner, holder or operator; an asset with several owners counts for each.
| Owner in United States | Rank | Mines | Share |
|---|---|---|---|
| Alpha Metallurgical Resources Inc | 1st | 56 | 2.1% |
| Sev.en Global Investments a.s. | 2nd | 50 | 1.9% |
| Rosebud Mining Company | 3rd | 40 | 1.5% |
| Martin Marietta Materials Inc | 4th | 29 | 1.1% |
| Metinvest B V | 4th | 29 | 1.1% |
| Rio Tinto Group | 100th | 4 | 0.15% |
Nearby
Within 50 km of this mine: 12 power plants (3 operating, 1,918 MW), measured from the coordinates in the facts above. The table shows the nearest 3.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Aratina Solar Center 1A | Power plant | 195 MW | Under construction | 13 km |
| Aratina Solar Center 1B | Power plant | 130 MW | Under construction | 13 km |
| Bellefield 3 Solar and Battery Storage | Power plant | 300 MW | Planned | 26 km |
Owner, operator and place
More from Rio Tinto Group
Other mines in California
Data on this page
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- MSHA Mines Data Set. MSHA Mines Data Set, Public domain.