# Relationship history for MSHA mine 4403758

Current hierarchy: **Justus Donald → Hurley & Justus Coal Company → No 2 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:** Justus Donald Et Al → No 2 Mine; 1972-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C D Coal Company → No 2 Mine; 1974-08-01 to 1975-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Datson James Carl → No 2 Mine; 1974-08-01 to 1975-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Datson James Carl → C D Coal Company; 1974-08-01 to 1975-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Hurley & Justus Coal Company → No 2 Mine; 1975-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justus Donald Et Al → Hurley & Justus Coal Company; 1975-03-01 to current/open; source msha-controller-operator-history