# Relationship history for MSHA mine 0504686

Current hierarchy: **Brt Holdings LLC; Aggregate Industries → Allied Portable Crushing/Recycling → ALLIED PORTABLE CRUSHING**

- 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:** Allied Portable Crushing/Recycling → ALLIED PORTABLE CRUSHING; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries  et al → ALLIED PORTABLE CRUSHING; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries  et al → Allied Portable Crushing/Recycling; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brt Holdings LLC  et al → Allied Portable Crushing/Recycling; 2000-08-01 to current/open; source msha-controller-operator-history