# Relationship history for MSHA mine 1506367

Current hierarchy: **Childers George → Childers Coal Company → No 3 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:** Childers George → No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lola Coal Company → No 3 Mine; 1950-01-01 to 1975-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Lola Coal Company → No 3 Mine; 1950-01-01 to 1975-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Lola Coal Company → Lola Coal Company; 1950-01-01 to 1975-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Childers Coal Company → No 3 Mine; 1975-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childers George → Childers Coal Company; 1975-01-18 to current/open; source msha-controller-operator-history