# Relationship history for MSHA mine 4403868

Current hierarchy: **Childress Arland L → C C & P Coal Company → 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:** Whited Donald & Mason → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Street & Whited Coal Company Inc → No 1 Mine; 1974-01-01 to 1975-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Whited Donald & Mason → Street & Whited Coal Company Inc; 1974-01-01 to 1975-02-17; source msha-controller-operator-history
- **operator_operates_mine:** C C & P Coal Company → No 1 Mine; 1975-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Childress Arland L → No 1 Mine; 1975-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Childress Arland L → C C & P Coal Company; 1975-02-18 to current/open; source msha-controller-operator-history