# Relationship history for MSHA mine 1514083

Current hierarchy: **Meade B D → Benson Creek Stone Company → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Benson Creek Stone Company → No 1; 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Meade B D → No 1; 1983-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Meade B D → Benson Creek Stone Company; 1983-06-01 to current/open; source msha-controller-operator-history