# Relationship history for MSHA mine 1701143

Current hierarchy: **Michael E  Whitham → Michael Whitham → Whitham Quarry**

- 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:** Michael Whitham → Whitham Quarry; 2024-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael E  Whitham → Whitham Quarry; 2024-11-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael E  Whitham → Michael Whitham; 2024-11-13 to current/open; source msha-controller-operator-history