# Relationship history for MSHA mine 1515755

Current hierarchy: **Pat R  Childers → Coal Recovery Inc → No 1**

- 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

- **controller_controls_mine:** Terry  Moore → No 1; 1984-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T M Coal Company → No 1; 1986-09-01 to 1992-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Moore → T M Coal Company; 1986-09-01 to 1992-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Coal Recovery Inc → No 1; 1992-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pat R  Childers → No 1; 1992-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pat R  Childers → Coal Recovery Inc; 1992-02-18 to current/open; source msha-controller-operator-history