# Relationship history for MSHA mine 2104117

Current hierarchy: **Burski Holding Company → Burski Aggregates, Inc → Wash Plant A007**

- 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:** Burski Holding Company → Wash Plant A007; 2025-06-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burski Aggregates, Inc → Wash Plant A007; 2026-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burski Holding Company → Burski Aggregates, Inc; 2026-05-14 to current/open; source msha-controller-operator-history