# Relationship history for MSHA mine 1512141

Current hierarchy: **Bennett Clyde V → Harlan Central Coal Company → No M-4 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:** Harlan Central Coal Company → No M-4 Mine; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bennett Clyde V → No M-4 Mine; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bennett Clyde V → Harlan Central Coal Company; 1979-11-01 to current/open; source msha-controller-operator-history