# Relationship history for MSHA mine 1518638

Current hierarchy: **John W  McElwain → Western Kentucky Operating Services, LLC. → Beech Creek**

- 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:** Western Kentucky Operating Services, LLC. → Beech Creek; 2003-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John W  McElwain → Beech Creek; 2003-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  McElwain → Western Kentucky Operating Services, LLC.; 2003-06-02 to current/open; source msha-controller-operator-history