# Relationship history for MSHA mine 1518905

Current hierarchy: **Westmoreland Coal Company → Oxford Mining Company-Kentucky, LLC → Jessup 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:** Stuart  Renfro → Jessup Mine; 1997-10-01 to 2008-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Renfro Equipment, Inc. → Jessup Mine; 2005-07-11 to 2009-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Stuart  Renfro → Renfro Equipment, Inc.; 2005-07-11 to 2008-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Phoenix Coal Corporation → Jessup Mine; 2008-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phoenix Coal Corporation → Renfro Equipment, Inc.; 2008-10-26 to 2009-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Oxford Mining Company-Kentucky, LLC → Jessup Mine; 2009-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles C  Ungurean → Jessup 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 → Jessup 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