# Relationship history for MSHA mine 4001822

Current hierarchy: **Chambers James F → Southeastern Mining Company → Tyree No 1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Chambers James F → Tyree No 1 Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southeastern Mining Company → Tyree No 1 Mine; 1975-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chambers James F → Southeastern Mining Company; 1975-10-24 to current/open; source msha-controller-operator-history