# Relationship history for MSHA mine 2401642

Current hierarchy: **Apollo Gold Corporation → Beal Mountain Mining Inc → BEAL MOUNTIAN 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:** Beal Mining Company → BEAL MOUNTIAN MINE; 1981-07-01 to 1988-10-17; source msha-controller-operator-history
- **controller_controls_mine:** Montoro Gold Inc → BEAL MOUNTIAN MINE; 1981-07-01 to 1988-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Montoro Gold Inc → Beal Mining Company; 1981-07-01 to 1988-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Beal Mountain Mining Inc → BEAL MOUNTIAN MINE; 1988-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Apollo Gold Corporation → BEAL MOUNTIAN MINE; 1988-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Apollo Gold Corporation → Beal Mountain Mining Inc; 1988-10-18 to current/open; source msha-controller-operator-history