# Relationship history for MSHA mine 3604007

Current hierarchy: **Hulings Raymond L → Energy Supply Inc/Donray Industries Inc → Mack 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Dunkard Creek Coal Inc → Mack Mine; 1950-01-01 to 1985-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Bartony Henry E → Mack Mine; 1950-01-01 to 1985-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Bartony Henry E → Dunkard Creek Coal Inc; 1950-01-01 to 1985-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Energy Supply Inc/Donray Industries Inc → Mack Mine; 1985-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hulings Raymond L → Mack Mine; 1985-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hulings Raymond L → Energy Supply Inc/Donray Industries Inc; 1985-01-05 to current/open; source msha-controller-operator-history