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Mines in Northern Mariana Islands
Mines reported to the Mine Safety and Health Administration
- Mines listed
- 8
- Active
- 8
- Employees
- 135
- Accidents reported in 2025
- 0
Mines are listed from MSHA's mine data, excluding mines recorded as abandoned. Accident counts are reports filed with MSHA for the calendar year, including injuries and illnesses at the mine, and are counts only. Operator names are shown only when they are companies or agencies.
Largest mines by employees
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| Mine | Type | Status | Employees | Accidents 2025 |
|---|---|---|---|---|
| Obyan Quarry | Metal/nonmetal, Surface | Active | 70 | 0 |
| OBYAN Staging Area | Metal/nonmetal, Surface | Active | 30 | 0 |
| New Hope Quarry | Metal/nonmetal, Surface | Active | 8 | 0 |
| USA Fanter Corp., Ltd. | Metal/nonmetal, Surface | Active | 8 | 0 |
| FPA Marpo Quarry | Metal/nonmetal, Surface | Active | 6 | 0 |
| CMS Quarry 1 | Metal/nonmetal, Surface | Active | 5 | 0 |
| J-G Sablan Rock Quarry | Metal/nonmetal, Surface | Active | 4 | 0 |
| RMIC Quarry Saipan | Metal/nonmetal, Surface | Active | 4 | 0 |
Source: Mine Safety and Health Administration, Open Government Data