# Relationship history for MSHA mine 1513452

Current hierarchy: **Young Flora R → Young Mining Company Inc → No 1 Strip**

- 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:** C A R Mining Company Inc → No 1 Strip; 1982-04-01 to 1984-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Young Robert C → No 1 Strip; 1982-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Young Robert C → C A R Mining Company Inc; 1982-04-01 to 1984-02-26; source msha-controller-operator-history
- **operator_operates_mine:** Young Mining Company Inc → No 1 Strip; 1984-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Young Flora R → No 1 Strip; 1984-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Young Flora R → Young Mining Company Inc; 1984-02-27 to current/open; source msha-controller-operator-history