# Relationship history for MSHA mine 1508632

Current hierarchy: **Sidney R  Young III → Max-Ann Coal Corp → No 1 (D)**

- 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:** Max-Ann Coal Corp → No 1 (D); 1975-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sidney R  Young III → No 1 (D); 1975-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sidney R  Young III → Max-Ann Coal Corp; 1975-08-11 to current/open; source msha-controller-operator-history