# Relationship history for MSHA mine 1516044

Current hierarchy: **Hughes Group Inc → Mor-Coal Inc → Will Branch**

- 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:** Hughes Group Inc → Will Branch; 1982-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mor-Coal Inc → Will Branch; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hughes Group Inc → Mor-Coal Inc; 1987-05-01 to current/open; source msha-controller-operator-history