# Relationship history for MSHA mine 4403680

Current hierarchy: **Mullins Burley → J & W Coal Company Inc → No 1**

- 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:** Hope Coal Company → No 1; 1973-11-01 to 1976-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Ray Jacky → No 1; 1973-11-01 to 1976-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Ray Jacky → Hope Coal Company; 1973-11-01 to 1976-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Camker Coal Corp → No 1; 1976-07-20 to 1981-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Kersey Frank N → No 1; 1976-07-20 to 1981-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Kersey Frank N → Camker Coal Corp; 1976-07-20 to 1981-07-26; source msha-controller-operator-history
- **operator_operates_mine:** J & W Coal Company Inc → No 1; 1981-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Burley Et Al → No 1; 1981-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Burley Et Al → J & W Coal Company Inc; 1981-07-27 to current/open; source msha-controller-operator-history