# Relationship history for MSHA mine 1518642

Current hierarchy: **Randy  Gilkerson → Ember Contracting Inc → Beaver Gap**

- 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:** Randy  Gilkerson et al → Beaver Gap; 1992-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yvonne  Yonts et al → Beaver Gap; 1997-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Straight Fork Mining Inc → Beaver Gap; 2003-07-02 to 2005-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Yvonne  Yonts et al → Straight Fork Mining Inc; 2003-07-02 to 2005-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Ember Contracting Inc → Beaver Gap; 2005-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Gilkerson et al → Ember Contracting Inc; 2005-07-05 to current/open; source msha-controller-operator-history