# Relationship history for MSHA mine 4300334

Current hierarchy: **Ormond  Bushey Jr → Ormond Bushey & Sons Inc → Bushey 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Ormond Bushey & Sons Inc → Bushey Pit; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ormond  Bushey Jr → Bushey Pit; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ormond  Bushey Jr → Ormond Bushey & Sons Inc; 1980-03-01 to current/open; source msha-controller-operator-history