# Relationship history for MSHA mine 4608007

Current hierarchy: **Alpha Metallurgical Resources Inc → Mammoth Coal Co. → Alloy No 1**

- 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:** Eddie  Hurley → Alloy No 1; 1991-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M A G Inc → Alloy No 1; 1991-03-01 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Stanley Michael R → Alloy No 1; 1991-03-01 to 1996-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Stanley Michael R → M A G Inc; 1991-03-01 to 1996-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Continuous Mining Company Inc → Alloy No 1; 1996-01-23 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Hurley → Continuous Mining Company Inc; 1996-01-23 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Alloy No 1; 1996-02-05 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Howtay Mining Company Inc → Alloy No 1; 1996-03-01 to 1996-09-02; source msha-controller-operator-history
- **controller_controls_mine:** Charles T  Norman → Alloy No 1; 1996-03-01 to 1996-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Norman → Howtay Mining Company Inc; 1996-03-01 to 1996-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Wilderness Mining Company Inc → Alloy No 1; 1996-09-03 to 2009-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Pittston Company → Alloy No 1; 1996-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Wilderness Mining Company Inc; 1996-09-03 to 2009-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Mammoth Coal Co. → Alloy No 1; 2009-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Mammoth Coal Co.; 2009-10-16 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Alloy No 1; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Mammoth Coal Co.; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Alloy No 1; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Mammoth Coal Co.; 2016-07-26 to 2018-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Alloy No 1; 2018-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Mammoth Coal Co.; 2018-11-09 to current/open; source msha-controller-operator-history