# Relationship history for MSHA mine 4609579

Current hierarchy: **Austin B  Kirk; Tim B  Young → Amber Lea Contractors, LLC → Amber Lea Auger**

- 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:** Austin B  Kirk et al → Amber Lea Auger; 2019-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amber Lea Contractors, LLC → Amber Lea Auger; 2019-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Austin B  Kirk et al → Amber Lea Contractors, LLC; 2019-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim B  Young et al → Amber Lea Contractors, LLC; 2019-08-28 to current/open; source msha-controller-operator-history