# Relationship history for MSHA mine 4604075

Current hierarchy: **Semones William H → Bentley Coal Company → No 2**

- 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:** Semones William H → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Holstein B B → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S & C Coal Company → No 2; 1974-04-22 to 1982-05-19; source msha-controller-operator-history
- **controller_controls_operator:** Semones William H → S & C Coal Company; 1974-04-22 to 1982-05-19; source msha-controller-operator-history
- **operator_operates_mine:** Bentley Coal Company → No 2; 1982-05-20 to 1983-10-06; source msha-controller-operator-history
- **controller_controls_operator:** Holstein B B → Bentley Coal Company; 1982-05-20 to 1983-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Bentley Coal Company → No 2; 1983-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Semones William H → No 2; 1983-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Semones William H → Bentley Coal Company; 1983-10-07 to current/open; source msha-controller-operator-history