# Relationship history for MSHA mine 2302268

Current hierarchy: **Pitman H  Miller → Pits Dozing Inc → Johnson 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:** Christy Minerals Co → Johnson Pit; 2002-06-24 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_mine:** O'Brien Industrial Holdings LLC → Johnson Pit; 2002-07-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O'Brien Industrial Holdings LLC → Christy Minerals Co; 2002-07-04 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Pitman H  Miller → Johnson Pit; 2009-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pits Dozing Inc → Johnson Pit; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pitman H  Miller → Pits Dozing Inc; 2009-10-01 to current/open; source msha-controller-operator-history