# Relationship history for MSHA mine 2901582

Current hierarchy: **Imerys S A → American Minerals Inc → AMERICAN MINERALS INC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Southwest American Minerals Inc → AMERICAN MINERALS INC; 1978-03-09 to 1998-01-28; source msha-controller-operator-history
- **controller_controls_mine:** American Premier Inc → AMERICAN MINERALS INC; 1978-03-09 to 1998-01-28; source msha-controller-operator-history
- **controller_controls_operator:** American Premier Inc → Southwest American Minerals Inc; 1978-03-09 to 1998-01-28; source msha-controller-operator-history
- **controller_controls_mine:** Imerys S A → AMERICAN MINERALS INC; 1997-11-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Minerals Inc → AMERICAN MINERALS INC; 1998-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Imerys S A → American Minerals Inc; 1998-01-29 to current/open; source msha-controller-operator-history