# Relationship history for MSHA mine 4104868

Current hierarchy: **Hockley County-TX → Hockley County Pct 3 → Precinct 3 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:** Hockley County Pct 3 → Precinct 3 Pit; 2011-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hockley County-TX → Precinct 3 Pit; 2011-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hockley County-TX → Hockley County Pct 3; 2011-04-07 to current/open; source msha-controller-operator-history