# Relationship history for MSHA mine 4604113

Current hierarchy: **Compton Lucky D → Chippewa Mining Inc → No (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:** B & S Coal Company → No (1); 1974-06-15 to 1980-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Brooks Melvin Sr → No (1); 1974-06-15 to 1980-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Brooks Melvin Sr → B & S Coal Company; 1974-06-15 to 1980-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Chippewa Mining Inc → No (1); 1980-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Compton Lucky D → No (1); 1980-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Compton Lucky D → Chippewa Mining Inc; 1980-08-28 to current/open; source msha-controller-operator-history