# Relationship history for MSHA mine 3606871

Current hierarchy: **George L  Rusnak; Edward  Rusnak → Rusnak Coal Company → Hawk Run 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

- **operator_operates_mine:** Rusnak Coal Company → Hawk Run Mine; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George L  Rusnak et al → Hawk Run Mine; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George L  Rusnak et al → Rusnak Coal Company; 1979-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Rusnak et al → Rusnak Coal Company; 1979-10-01 to current/open; source msha-controller-operator-history