# Relationship history for MSHA mine 4605992

Current hierarchy: **Alpha Metallurgical Resources Inc → Black Castle Mining Company LLC → Homer III Processing**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Cyprus Amax Minerals Company → Homer III Processing; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Homer III Processing; 1974-01-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Cannelton Industries Inc → Homer III Processing; 1979-05-01 to 2001-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cannelton Industries Inc; 1979-05-01 to 2001-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Homer III Processing; 1991-12-01 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Black Castle Mining Co → Homer III Processing; 2001-11-07 to 2009-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Black Castle Mining Co; 2001-11-07 to 2009-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Homer III Processing; 2007-12-08 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Independence Coal Company Inc. → Homer III Processing; 2009-03-21 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Independence Coal Company Inc.; 2009-03-21 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Homer III Processing; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Black Castle Mining Co; 2011-06-01 to 2009-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Independence Coal Company Inc.; 2011-06-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Black Castle Mining Company LLC → Homer III Processing; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Black Castle Mining Company LLC; 2014-01-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Black Castle Mining Company LLC; 2014-01-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Homer III Processing; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Black Castle Mining Co; 2016-07-26 to 2009-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Black Castle Mining Company LLC; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Homer III Processing; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Independence Coal Company Inc.; 2016-07-26 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Homer III Processing; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Black Castle Mining Co; 2018-11-09 to 2009-03-20; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Black Castle Mining Company LLC; 2018-11-09 to current/open; source msha-controller-operator-history