# Relationship history for MSHA mine 1508570

Current hierarchy: **Romine John H → Dixie Fuel Of Premium Inc → No 7 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

- **controller_controls_mine:** Romine John H → No 7 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Fuel Of Premium Inc → No 7 Mine; 1975-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Romine John H → Dixie Fuel Of Premium Inc; 1975-02-22 to current/open; source msha-controller-operator-history