# Relationship history for MSHA mine 4605252

Current hierarchy: **Core Natural Resources Inc → ICG BECKLEY LLC → BECKLEY POCAHONTAS 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:** Westmoreland Coal Company → BECKLEY POCAHONTAS MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Coal Company → BECKLEY POCAHONTAS MINE; 1976-08-16 to 2006-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1976-08-16 to 2006-01-19; source msha-controller-operator-history
- **operator_operates_mine:** ICG Beckley LLC → BECKLEY POCAHONTAS MINE; 2006-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → BECKLEY POCAHONTAS MINE; 2006-01-20 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ICG Beckley LLC; 2006-01-20 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → BECKLEY POCAHONTAS MINE; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ICG Beckley LLC; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Core Natural Resources Inc → BECKLEY POCAHONTAS MINE; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → ICG Beckley LLC; 2025-01-14 to current/open; source msha-controller-operator-history