# Relationship history for MSHA mine 1519303

Current hierarchy: **Westmoreland Coal Company → Oxford Mining Company-Kentucky LLC → K O Mine**

- 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:** David A  Wiley et al → K O Mine; 2006-02-02 to 2006-05-30; source msha-controller-operator-history
- **controller_controls_mine:** Phoenix Coal Corporation → K O Mine; 2006-05-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Coal Corporation → K O Mine; 2008-09-17 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_operator:** David A  Wiley et al → Phoenix Coal Corporation; 2008-09-17 to 2006-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Anthony R  Atti et al → Phoenix Coal Corporation; 2008-09-17 to 2006-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Phoenix Coal Corporation → Phoenix Coal Corporation; 2008-09-17 to 2009-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Oxford Mining Company-Kentucky LLC → K O Mine; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → K O Mine; 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 → K O Mine; 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