# Relationship history for MSHA mine 1504366

Current hierarchy: **Arnold B G → Star Fire Coals Inc → No 1 Auger 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:** Star Fire Coals Inc → No 1 Auger Mine; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_mine:** Sharpe Edward L → No 1 Auger Mine; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **controller_controls_operator:** Sharpe Edward L → Star Fire Coals Inc; 1950-01-01 to 1975-01-01; source msha-controller-operator-history
- **operator_operates_mine:** Star Fire Coals Inc → No 1 Auger Mine; 1975-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arnold B G → No 1 Auger Mine; 1975-01-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arnold B G → Star Fire Coals Inc; 1975-01-02 to current/open; source msha-controller-operator-history