# Relationship history for MSHA mine 4602215

Current hierarchy: **Barnett French Jr → Angela Mining Company → #3 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Melva Mining Company → #3 Mine; 1950-01-01 to 1981-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Barnett Earl C → #3 Mine; 1950-01-01 to 1981-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Barnett Earl C → Melva Mining Company; 1950-01-01 to 1981-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Angela Mining Company → #3 Mine; 1981-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barnett French Jr Et Al → #3 Mine; 1981-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barnett French Jr Et Al → Angela Mining Company; 1981-04-21 to current/open; source msha-controller-operator-history