# Relationship history for MSHA mine 0503763

Current hierarchy: **Heon Raymond P → Marquette Minerals Inc → Aorta Tunnel**

- 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

- **controller_controls_mine:** Heon Raymond P → Aorta Tunnel; 1980-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marquette Minerals Inc → Aorta Tunnel; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heon Raymond P → Marquette Minerals Inc; 1982-02-01 to current/open; source msha-controller-operator-history