# Relationship history for MSHA mine 4605962

Current hierarchy: **Adkins John A → Saac Industries Inc → No 1 Surface**

- 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:** ITT Corporation → No 1 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → No 1 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carbon Fuel Company → No 1 Surface; 1979-02-01 to 1982-06-11; source msha-controller-operator-history
- **controller_controls_operator:** ITT Corporation → Carbon Fuel Company; 1979-02-01 to 1982-06-11; source msha-controller-operator-history
- **operator_operates_mine:** United States Steel Mining Company Inc → No 1 Surface; 1982-06-12 to 1989-03-15; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1982-06-12 to 1989-03-15; source msha-controller-operator-history
- **operator_operates_mine:** Saac Industries Inc → No 1 Surface; 1989-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adkins John A → No 1 Surface; 1989-03-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins John A → Saac Industries Inc; 1989-03-16 to current/open; source msha-controller-operator-history