# Relationship history for MSHA mine 4603980

Current hierarchy: **Justice Lacy--Linzie-Cathern & Ereling Matney → Justice 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Lester Coal Company → No 1 Mine; 1950-01-01 to 1974-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Lester Kenneth → No 1 Mine; 1950-01-01 to 1974-08-01; source msha-controller-operator-history
- **controller_controls_operator:** Lester Kenneth → Lester Coal Company; 1950-01-01 to 1974-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Justice Coal Company → No 1 Mine; 1974-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justice Lacy--Linzie-Cathern & Ereling Matney → No 1 Mine; 1974-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justice Lacy--Linzie-Cathern & Ereling Matney → Justice Coal Company; 1974-08-02 to current/open; source msha-controller-operator-history