# Relationship history for MSHA mine 4605544

Current hierarchy: **Core Natural Resources Inc → Wolf Run Mining LLC → Sawmill Run Preparation Plant**

- 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:** Pittston Company → Sawmill Run Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Badger Coal Company → Sawmill Run Preparation Plant; 1977-06-01 to 1997-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Badger Coal Company; 1977-06-01 to 1997-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → Sawmill Run Preparation Plant; 1990-07-17 to 2005-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Hawthorne Coal Company Inc → Sawmill Run Preparation Plant; 1997-02-17 to 2008-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → Sawmill Run Preparation Plant; 1997-02-17 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Hawthorne Coal Company Inc; 1997-02-17 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Sawmill Run Preparation Plant; 2005-06-01 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Sawmill Run Preparation Plant; 2005-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Hawthorne Coal Company Inc; 2005-11-18 to 2008-08-20; source msha-controller-operator-history
- **operator_operates_mine:** Wolf Run Mining LLC → Sawmill Run Preparation Plant; 2008-08-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Wolf Run Mining LLC; 2008-08-21 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Wolf Run Mining LLC; 2008-08-21 to 2005-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Sawmill Run Preparation Plant; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Wolf Run Mining LLC; 2011-06-15 to 2025-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Core Natural Resources Inc → Sawmill Run Preparation Plant; 2025-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Core Natural Resources Inc → Wolf Run Mining LLC; 2025-01-14 to current/open; source msha-controller-operator-history