# Relationship history for MSHA mine 4603780

Current hierarchy: **Lowe Coal Company → Lowe 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

- **operator_operates_mine:** M & L Coal Company → No 3 Mine; 1950-01-01 to 1975-04-01; source msha-controller-operator-history
- **controller_controls_mine:** M & L Coal Company → No 3 Mine; 1950-01-01 to 1975-04-01; source msha-controller-operator-history
- **controller_controls_operator:** M & L Coal Company → M & L Coal Company; 1950-01-01 to 1975-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Lowe Coal Company → No 3 Mine; 1975-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lowe Coal Company → No 3 Mine; 1975-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lowe Coal Company → Lowe Coal Company; 1975-04-02 to current/open; source msha-controller-operator-history