# Relationship history for MSHA mine 4604218

Current hierarchy: **Coal Corp → Cowen Coals Inc → Cowen Tipple**

- 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:** Cowen Coals Inc → Cowen Tipple; 1974-06-01 to 1984-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Beasley Industries Inc → Cowen Tipple; 1974-06-01 to 1984-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Beasley Industries Inc → Cowen Coals Inc; 1974-06-01 to 1984-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Cowen Coals Inc → Cowen Tipple; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coal Corp → Cowen Tipple; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coal Corp → Cowen Coals Inc; 1984-10-01 to current/open; source msha-controller-operator-history