# Relationship history for MSHA mine 0203433

Current hierarchy: **Vincent P  Nalbone → Bones Stone and Sand, LLC → Bones Stone and Sand**

- 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:** Bones Stone and Sand, LLC → Bones Stone and Sand; 2020-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent P  Nalbone → Bones Stone and Sand; 2020-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent P  Nalbone → Bones Stone and Sand, LLC; 2020-08-02 to current/open; source msha-controller-operator-history