# Relationship history for MSHA mine 4603181

Current hierarchy: **Alpha Metallurgical Resources Inc → Republic Energy LLC → Collins Fork Slurry Impoundment**

- 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

- **operator_operates_mine:** Consolidation Coal Company → Collins Fork Slurry Impoundment; 1950-01-01 to 1998-11-29; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Collins Fork Slurry Impoundment; 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 1998-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Clear Fork Coal Company → Collins Fork Slurry Impoundment; 1998-11-30 to 2014-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Collins Fork Slurry Impoundment; 1998-11-30 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Clear Fork Coal Company; 1998-11-30 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Collins Fork Slurry Impoundment; 2009-08-25 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Collins Fork Slurry Impoundment; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Clear Fork Coal Company; 2011-06-01 to 2014-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Collins Fork Slurry Impoundment; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to 1998-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Collins Fork Slurry Impoundment; 2014-01-27 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Republic Energy, INC. → Collins Fork Slurry Impoundment; 2014-09-26 to 2016-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Republic Energy, INC.; 2014-09-26 to 2016-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Republic Energy, INC.; 2014-09-26 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Clear Fork Coal Company → Collins Fork Slurry Impoundment; 2016-04-18 to 2016-12-19; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Clear Fork Coal Company; 2016-04-18 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Clear Fork Coal Company; 2016-04-18 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Collins Fork Slurry Impoundment; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Republic Energy, INC.; 2016-07-26 to 2016-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Collins Fork Slurry Impoundment; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Clear Fork Coal Company; 2016-07-26 to 2014-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Clear Fork Coal Company; 2016-07-26 to 2016-12-19; source msha-controller-operator-history
- **operator_operates_mine:** Republic Energy LLC → Collins Fork Slurry Impoundment; 2016-12-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Republic Energy LLC; 2016-12-20 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Republic Energy LLC; 2016-12-20 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Republic Energy LLC; 2016-12-20 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Collins Fork Slurry Impoundment; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Republic Energy, INC.; 2018-11-09 to 2016-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Republic Energy LLC; 2018-11-09 to current/open; source msha-controller-operator-history