# Relationship history for MSHA mine 1514081

Current hierarchy: **Hess Dale & Dereck → Jenny Branch Coal Company Inc → No 1 Mine (D)**

- 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:** Jenny Branch Coal Company Inc → No 1 Mine (D); 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hess Dale & Dereck → No 1 Mine (D); 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hess Dale & Dereck → Jenny Branch Coal Company Inc; 1983-06-01 to current/open; source msha-controller-operator-history