# Relationship history for MSHA mine 0505186

Current hierarchy: **Jared Jay Graff → Best Rock Sand and Gravel LLC → BRS&G pit 1 M-2019-018**

- 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:** Best Rock Sand and Gravel LLC → BRS&G pit 1 M-2019-018; 2024-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jared Jay Graff → BRS&G pit 1 M-2019-018; 2024-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jared Jay Graff → Best Rock Sand and Gravel LLC; 2024-01-24 to current/open; source msha-controller-operator-history