# Relationship history for MSHA mine 1512134

Current hierarchy: **Engle Bill → Profit Mining Company Inc → No M-4**

- 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

- **controller_controls_mine:** Joseph T  Bennett  et al → No M-4; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Fuel Company → No M-4; 1979-12-01 to 1989-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Joseph T  Bennett  et al → Dixie Fuel Company; 1979-12-01 to 1989-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Profit Mining Company Inc → No M-4; 1989-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Engle Bill → No M-4; 1989-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Engle Bill → Profit Mining Company Inc; 1989-05-17 to current/open; source msha-controller-operator-history