# Relationship history for MSHA mine 4601544

Current hierarchy: **Alpha Metallurgical Resources Inc → Spartan Mining Company, LLC → Road Fork #51 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:** Nippon Kokan K K et al → Road Fork #51 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Consolidation Coal Company → Road Fork #51 Mine; 1950-01-01 to 1975-01-04; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Road Fork #51 Mine; 1950-01-01 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consolidation Coal Company; 1950-01-01 to 1975-01-04; source msha-controller-operator-history
- **operator_operates_mine:** National Mines Corp → Road Fork #51 Mine; 1975-01-05 to 2005-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Nippon Kokan K K et al → National Mines Corp; 1975-01-05 to 2005-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Road Fork #51 Mine; 1993-01-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Road Fork #51 Mine; 1996-02-05 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Road Fork Development  Company, Inc. → Road Fork #51 Mine; 2005-02-11 to 2005-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Road Fork Development  Company, Inc.; 2005-02-11 to 2005-09-19; source msha-controller-operator-history
- **operator_operates_mine:** Spartan Mining Company, LLC → Road Fork #51 Mine; 2005-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Spartan Mining Company, LLC; 2005-09-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Road Fork #51 Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Road Fork Development  Company, Inc.; 2011-06-01 to 2005-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Spartan Mining Company, LLC; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Road Fork #51 Mine; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to 1975-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Road Fork #51 Mine; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Road Fork Development  Company, Inc.; 2016-07-26 to 2005-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Spartan Mining Company, LLC; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Road Fork #51 Mine; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Road Fork Development  Company, Inc.; 2018-11-09 to 2005-09-19; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Spartan Mining Company, LLC; 2018-11-09 to current/open; source msha-controller-operator-history