# Relationship history for MSHA mine 1508932

Current hierarchy: **Hall Charles D → Cedar Mining 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Justice Joseph A → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Mining Company Inc → No 1 Mine; 1975-01-01 to 1976-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Justice Joseph A → Cedar Mining Company Inc; 1975-01-01 to 1976-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Cedar Mining Company → No 1 Mine; 1976-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hall Charles D → No 1 Mine; 1976-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hall Charles D → Cedar Mining Company; 1976-02-26 to current/open; source msha-controller-operator-history