# Relationship history for MSHA mine 1518622

Current hierarchy: **Westmoreland Coal Company → Oxford Mining Company-Kentucky, LLC → Back in Black**

- 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:** Linda A  Winn et al → Back in Black; 1989-05-01 to 2006-07-05; source msha-controller-operator-history
- **controller_controls_mine:** William L  Cook → Back in Black; 2003-02-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** William Ann Enterprises, Inc. → Back in Black; 2003-03-10 to 2003-04-13; source msha-controller-operator-history
- **controller_controls_operator:** William L  Cook → William Ann Enterprises, Inc.; 2003-03-10 to 2003-04-13; source msha-controller-operator-history
- **operator_operates_mine:** R & L Winn Inc → Back in Black; 2003-04-14 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Linda A  Winn et al → R & L Winn Inc; 2003-04-14 to 2006-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Randall G  Winn et al → R & L Winn Inc; 2003-04-14 to 2006-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Phoenix Coal Corporation → Back in Black; 2006-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phoenix Coal Corporation → R & L Winn Inc; 2006-07-06 to 2009-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Oxford Mining Company-Kentucky, LLC → Back in Black; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → Back in Black; 2009-10-01 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles C  Ungurean → Oxford Mining Company-Kentucky, LLC; 2009-10-01 to 2014-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Back in Black; 2015-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Oxford Mining Company-Kentucky, LLC; 2015-01-01 to current/open; source msha-controller-operator-history