# Relationship history for MSHA mine 4604445

Current hierarchy: **Tomblin Archie & Paul → Elk Mining Company Inc → Elk No 4 Mine**

- 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

- **controller_controls_mine:** Tomblin Archie & Paul → Elk No 4 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pozegh Coal Co → Elk No 4 Mine; 1974-01-01 to 1974-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Pozegh Coal Co → Elk No 4 Mine; 1974-01-01 to 1974-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Pozegh Coal Co → Pozegh Coal Co; 1974-01-01 to 1974-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Elk Mining Company Inc → Elk No 4 Mine; 1974-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Archie & Paul → Elk Mining Company Inc; 1974-12-02 to current/open; source msha-controller-operator-history