# Relationship history for MSHA mine 1001964

Current hierarchy: **Robert E  Mori; Glenn R  Haugh → American Industrial Minerals → MAHOGANY MINE**

- 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:** American Industrial Minerals → MAHOGANY MINE; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenn R  Haugh  et al → MAHOGANY MINE; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn R  Haugh  et al → American Industrial Minerals; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Mori  et al → American Industrial Minerals; 1999-10-01 to current/open; source msha-controller-operator-history