# Relationship history for MSHA mine 4604530

Current hierarchy: **Politino Rodney & Tony Jr → Sani Mining Company Inc → Number 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:** Hylton Tracy W → Number 1 Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whitesville A & S Coal Company Inc → Number 1 Surface; 1975-03-10 to 1979-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Hylton Tracy W → Whitesville A & S Coal Company Inc; 1975-03-10 to 1979-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Willow Mining Company → Number 1 Surface; 1979-10-01 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Mason Martin E → Number 1 Surface; 1979-10-01 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Mason Martin E → Willow Mining Company; 1979-10-01 to 1981-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Sani Mining Company Inc → Number 1 Surface; 1981-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Politino Rodney & Tony Jr → Number 1 Surface; 1981-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Politino Rodney & Tony Jr → Sani Mining Company Inc; 1981-06-24 to current/open; source msha-controller-operator-history