# Relationship history for MSHA mine 4605872

Current hierarchy: **Alpha Metallurgical Resources Inc → Litwar Processing Company, LLC → Litwar 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:** Coal Arbed → Litwar Preparation Plant; 1975-12-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Ash Sales Company Inc → Litwar Preparation Plant; 1978-07-01 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Coal Arbed → Red Ash Sales Company Inc; 1978-07-01 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_mine:** American Metals & Coal International Inc → Litwar Preparation Plant; 1990-12-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Virginia Crews Coal Company → Litwar Preparation Plant; 1992-05-26 to 2003-03-10; source msha-controller-operator-history
- **controller_controls_operator:** American Metals & Coal International Inc → Virginia Crews Coal Company; 1992-05-26 to 2003-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Litwar Processing Company, LLC → Litwar Preparation Plant; 2003-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Litwar Preparation Plant; 2003-03-11 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Litwar Processing Company, LLC; 2003-03-11 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Litwar Preparation Plant; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Litwar Processing Company, LLC; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Litwar Preparation Plant; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Litwar Processing Company, LLC; 2018-11-09 to current/open; source msha-controller-operator-history