# Relationship history for MSHA mine 3003532

Current hierarchy: **Anthony L.  Grande II; Gregory S.  Grande → Grande Stone Quarry → Grande Stone 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

- **operator_operates_mine:** Grande Stone Quarry → Grande Stone Quarry; 2005-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anthony L.  Grande II et al → Grande Stone Quarry; 2005-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony L.  Grande II et al → Grande Stone Quarry; 2005-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory S.  Grande et al → Grande Stone Quarry; 2005-08-30 to current/open; source msha-controller-operator-history