# Relationship history for MSHA mine 4104885

Current hierarchy: **Paul  Walker → Hardin-Walker Development Inc → Dilley Pit**

- 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:** Hardin-Walker Development Inc → Dilley Pit; 2011-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Walker → Dilley Pit; 2011-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Walker → Hardin-Walker Development Inc; 2011-05-16 to current/open; source msha-controller-operator-history