# Relationship history for MSHA mine 1201620

Current hierarchy: **Winchell Charles P → Heritage Hills Coal Sales Company Inc → Heritage Hills Coal Sales Co Inc (Hannin**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Winchell Charles P → Heritage Hills Coal Sales Co Inc (Hannin; 1975-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Heritage Hills Coal Sales Company Inc → Heritage Hills Coal Sales Co Inc (Hannin; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Winchell Charles P → Heritage Hills Coal Sales Company Inc; 1977-11-01 to current/open; source msha-controller-operator-history