# Relationship history for MSHA mine 3602255

Current hierarchy: **Irene  Savitski → Savitski Brothers Coal Company → Savitski Bros Breaker**

- 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

- **operator_operates_mine:** Savitski Brothers Coal Sales → Savitski Bros Breaker; 1950-01-01 to 1984-12-19; source msha-controller-operator-history
- **controller_controls_mine:** Anthony  Savitski Jr et al → Savitski Bros Breaker; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Savitski Jr et al → Savitski Brothers Coal Sales; 1950-01-01 to 1984-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Savitski Sr et al → Savitski Brothers Coal Sales; 1950-01-01 to 1984-12-19; source msha-controller-operator-history
- **operator_operates_mine:** Savitski Brothers Coal Company → Savitski Bros Breaker; 1984-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Irene  Savitski → Savitski Bros Breaker; 1984-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Irene  Savitski → Savitski Brothers Coal Company; 1984-12-20 to current/open; source msha-controller-operator-history