# Relationship history for MSHA mine 3609593

Current hierarchy: **Thomas S  Hynoski → Hynoski Bros Excavating Inc → Hynoski Bros Centralia 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Thomas S  Hynoski et al → Hynoski Bros Centralia Mine; 1989-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hynoski Bros Excavating Inc → Hynoski Bros Centralia Mine; 2008-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas S  Hynoski et al → Hynoski Bros Excavating Inc; 2008-03-12 to current/open; source msha-controller-operator-history