# Relationship history for MSHA mine 1514897

Current hierarchy: **Blevins Harry Sr → Majestic Mining Company Inc → No 1 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

- **controller_controls_mine:** Francis Robert L → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barbara Kay Coal Corp → No 1 Mine; 1984-10-01 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Francis Robert L → Barbara Kay Coal Corp; 1984-10-01 to 1986-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Anderson Charles → No 1 Mine; 1985-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Scratch Back Coal Company Inc → No 1 Mine; 1986-10-01 to 1988-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Charles → Scratch Back Coal Company Inc; 1986-10-01 to 1988-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Iron Head Mining Inc → No 1 Mine; 1988-04-18 to 1989-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Smith Glen A → No 1 Mine; 1988-04-18 to 1990-09-10; source msha-controller-operator-history
- **controller_controls_operator:** Smith Glen A → Iron Head Mining Inc; 1988-04-18 to 1989-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Black Energy Inc → No 1 Mine; 1989-01-04 to 1989-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Hall Billy Ray → No 1 Mine; 1989-01-04 to 1989-09-11; source msha-controller-operator-history
- **controller_controls_operator:** Hall Billy Ray → Black Energy Inc; 1989-01-04 to 1989-09-11; source msha-controller-operator-history
- **operator_operates_mine:** Majestic Mining Company Inc → No 1 Mine; 1989-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blevins Harry Sr → No 1 Mine; 1989-09-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blevins Harry Sr → Majestic Mining Company Inc; 1989-09-12 to current/open; source msha-controller-operator-history