# Relationship history for MSHA mine 4404525

Current hierarchy: **Mullins Estil & Curtis Justus Jr → M & J 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:** Mullins Estil & Curtis Justus Jr → No 2 Mine; 1975-11-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & J Coal Company → No 2 Mine; 1976-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Estil & Curtis Justus Jr → M & J Coal Company; 1976-08-01 to current/open; source msha-controller-operator-history