# Relationship history for MSHA mine 2002650

Current hierarchy: **Hoard Wilbur L → Wilbur L Hoard → Marl 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:** Wilbur L Hoard → Marl Pit; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hoard Wilbur L → Marl Pit; 1981-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoard Wilbur L → Wilbur L Hoard; 1981-06-01 to current/open; source msha-controller-operator-history