# Relationship history for MSHA mine 4502057

Current hierarchy: **Lillian M  Shotwell → J D Shotwell Company → Hale Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lillian M  Shotwell → Hale Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lewis County-Department Of Public Works → Hale Quarry; 1950-01-01 to 1984-02-21; source msha-controller-operator-history
- **controller_controls_mine:** Lewis County-Wa → Hale Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis County-Wa → Lewis County-Department Of Public Works; 1950-01-01 to 1984-02-21; source msha-controller-operator-history
- **operator_operates_mine:** J D Shotwell Company → Hale Quarry; 1984-02-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lillian M  Shotwell → J D Shotwell Company; 1984-02-22 to current/open; source msha-controller-operator-history