# Relationship history for MSHA mine 2602604

Current hierarchy: **Mark  Vafiades; Mike J  Bruce → Precious Metals Recovery Systems LLC → Bovie-Lew**

- 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

- **operator_operates_mine:** Precious Metals Recovery Systems LLC → Bovie-Lew; 2007-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Vafiades et al → Bovie-Lew; 2007-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Vafiades et al → Precious Metals Recovery Systems LLC; 2007-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike J  Bruce et al → Precious Metals Recovery Systems LLC; 2007-11-06 to current/open; source msha-controller-operator-history