# Relationship history for MSHA mine 4003335

Current hierarchy: **James  Botbyl → Silvara Industries Inc. → Chestnut Hill/Lone Star Quarry**

- 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:** James  Botbyl → Chestnut Hill/Lone Star Quarry; 2004-07-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silvara Industries Inc. → Chestnut Hill/Lone Star Quarry; 2008-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Botbyl → Silvara Industries Inc.; 2008-10-15 to current/open; source msha-controller-operator-history