# Relationship history for MSHA mine 1515713

Current hierarchy: **Milford  Compton; Herstel  Ratliff → Black Star Mining Company Inc → No 2**

- 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:** Carter Branch Mining Company Inc → No 2; 1986-08-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Justice George → No 2; 1986-08-01 to 1994-02-21; source msha-controller-operator-history
- **controller_controls_operator:** Justice George → Carter Branch Mining Company Inc; 1986-08-01 to 1994-02-21; source msha-controller-operator-history
- **operator_operates_mine:** Black Star Mining Company Inc → No 2; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Milford  Compton et al → No 2; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milford  Compton et al → Black Star Mining Company Inc; 1994-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herstel  Ratliff et al → Black Star Mining Company Inc; 1994-02-22 to current/open; source msha-controller-operator-history