# Relationship history for MSHA mine 2200038

Current hierarchy: **Savery Joe L → Savery Brick & Tile Company Inc → Savery Pit #1**

- 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:** Savery Brick & Tile Company Inc → Savery Pit #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Savery Joe L → Savery Pit #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Savery Joe L → Savery Brick & Tile Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history