# Relationship history for MSHA mine 4300523

Current hierarchy: **Barre Granite Holdings Llc → Barre Granite Quarries Llc → BARRE GRANITE QUARRIES QUARRY OP**

- 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:** Barre Granite Holdings Llc → BARRE GRANITE QUARRIES QUARRY OP; 1997-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barre Granite Quarries Llc → BARRE GRANITE QUARRIES QUARRY OP; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barre Granite Holdings Llc → Barre Granite Quarries Llc; 1999-06-01 to current/open; source msha-controller-operator-history