# Relationship history for MSHA mine 4602151

Current hierarchy: **Arch Resources Inc → Vindex Energy LLC → Vindex Energy**

- 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:** Allegheny Mining Corp → Vindex Energy; 1950-01-01 to 1983-05-11; source msha-controller-operator-history
- **controller_controls_mine:** PBS Coals Inc (Obsolete-see C15843) → Vindex Energy; 1950-01-01 to 1983-05-11; source msha-controller-operator-history
- **controller_controls_operator:** PBS Coals Inc (Obsolete-see C15843) → Allegheny Mining Corp; 1950-01-01 to 1983-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Allegheny Mining Corp Inc → Vindex Energy; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **controller_controls_mine:** NSM PLC → Vindex Energy; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Allegheny Mining Corp Inc; 1983-05-12 to 1985-10-17; source msha-controller-operator-history
- **operator_operates_mine:** Allegheny Mining Corp → Vindex Energy; 1985-10-18 to 1990-07-25; source msha-controller-operator-history
- **controller_controls_mine:** FSS Coal Holding Inc → Vindex Energy; 1985-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** FSS Coal Holding Inc → Allegheny Mining Corp; 1985-10-18 to 1990-07-25; source msha-controller-operator-history
- **operator_operates_mine:** New Allegheny Inc → Vindex Energy; 1990-07-26 to 1997-02-09; source msha-controller-operator-history
- **controller_controls_mine:** John R  Kortas → Vindex Energy; 1990-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R  Kortas → New Allegheny Inc; 1990-07-26 to 1997-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Vindex Energy LLC → Vindex Energy; 1997-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anker Group Inc → Vindex Energy; 1997-02-10 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Anker Group Inc → Vindex Energy LLC; 1997-02-10 to 2005-11-17; source msha-controller-operator-history
- **controller_controls_mine:** International Coal Group Inc (ICG) → Vindex Energy; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → Vindex Energy LLC; 2005-11-18 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Vindex Energy; 2011-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Vindex Energy LLC; 2011-06-15 to current/open; source msha-controller-operator-history