# Relationship history for MSHA mine 4608572

Current hierarchy: **Costelac Robert L → Patricia Coal Company Inc → Jack Run Mine**

- 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:** Patricia Coal Company Inc → Jack Run Mine; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Costelac Robert L → Jack Run Mine; 1996-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Costelac Robert L → Patricia Coal Company Inc; 1996-06-01 to current/open; source msha-controller-operator-history