# Relationship history for MSHA mine 4003356

Current hierarchy: **James  Botbyl → Silvara Industries Inc. → Stone Quarries**

- 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:** James  Botbyl → Stone Quarries; 2004-07-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silvara Industries Inc. → Stone Quarries; 2009-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Botbyl → Silvara Industries Inc.; 2009-06-17 to current/open; source msha-controller-operator-history