# Relationship history for MSHA mine 4608152

Current hierarchy: **Bowling D L (Jack)--K Dale Tolliver → Superior Sewell Inc → Mine No 4**

- 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:** Superior Sewell Inc → Mine No 4; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowling D L (Jack)--K Dale Tolliver Et Al → Mine No 4; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowling D L (Jack)--K Dale Tolliver Et Al → Superior Sewell Inc; 1992-02-01 to current/open; source msha-controller-operator-history