# Relationship history for MSHA mine 4606958

Current hierarchy: **Core Natural Resources Inc → Mingo Logan Coal Company → Mountaineer 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** British Petroleum Company PLC → Mountaineer Mine; 1985-02-01 to 1990-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Logan Coal Company → Mountaineer Mine; 1985-07-01 to 1990-01-23; source msha-controller-operator-history
- **controller_controls_operator:** British Petroleum Company PLC → Mingo Logan Coal Company; 1985-07-01 to 1990-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Logan Coal Company → Mountaineer Mine; 1990-01-24 to 1991-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Mountaineer Mine; 1990-01-24 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Mingo Logan Coal Company; 1990-01-24 to 1991-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Larc Inc → Mountaineer Mine; 1991-05-17 to 1992-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Albert F  Robinson → Mountaineer Mine; 1991-05-17 to 1998-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Albert F  Robinson → Larc Inc; 1991-05-17 to 1992-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Mingo Logan Coal Company → Mountaineer Mine; 1992-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Mingo Logan Coal Company; 1992-01-08 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Mountaineer Mine; 1997-07-01 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Mingo Logan Coal Company; 1997-07-01 to 1991-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Mingo Logan Coal Company; 1997-07-01 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Core Natural Resources Inc → Mountaineer Mine; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → Mingo Logan Coal Company; 2025-01-14 to 1991-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → Mingo Logan Coal Company; 2025-01-14 to current/open; source msha-controller-operator-history