# Relationship history for MSHA mine 4609029

Current hierarchy: **Core Natural Resources Inc → Mingo Logan Coal LLC → Mountaineer II 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:** Ashland Inc et al → Mountaineer II Mine; 1990-01-24 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Mountaineer II Mine; 1997-07-01 to 2025-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Logan Coal LLC → Mountaineer II Mine; 2004-03-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Mingo Logan Coal LLC; 2004-03-25 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Mingo Logan Coal LLC; 2004-03-25 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Core Natural Resources Inc → Mountaineer II Mine; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → Mingo Logan Coal LLC; 2025-01-14 to current/open; source msha-controller-operator-history