# Relationship history for MSHA mine 3609457

Current hierarchy: **Joseph  Bosack; Marc  Berzowski → J & M Coal Company LLC → Joe Bosack 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

- **controller_controls_mine:** Charlie  Sorokach et al → Joe Bosack Mine; 2001-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Char-Pac Coal Co LLC → Joe Bosack Mine; 2006-07-27 to 2011-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Charlie  Sorokach et al → Char-Pac Coal Co LLC; 2006-07-27 to 2011-12-20; source msha-controller-operator-history
- **operator_operates_mine:** J & M Coal Company LLC → Joe Bosack Mine; 2011-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Bosack et al → Joe Bosack Mine; 2011-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Bosack et al → J & M Coal Company LLC; 2011-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marc  Berzowski et al → J & M Coal Company LLC; 2011-12-21 to current/open; source msha-controller-operator-history