# Relationship history for MSHA mine 3609028

Current hierarchy: **Marvin J  Armitage Sr → Marvin J. Armitage Sr. → MARVIN J ARMITAGE**

- 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:** Marvin J. Armitage Sr. → MARVIN J ARMITAGE; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marvin J  Armitage Sr → MARVIN J ARMITAGE; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin J  Armitage Sr → Marvin J. Armitage Sr.; 2001-09-25 to current/open; source msha-controller-operator-history