# Relationship history for MSHA mine 0203519

Current hierarchy: **Arcosa, Inc → Arcosa Aggregates West LLC → 1046 Shaw**

- 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

- **controller_controls_mine:** Arcosa, Inc → 1046 Shaw; 2022-12-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arcosa Aggregates West LLC → 1046 Shaw; 2024-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arcosa, Inc → Arcosa Aggregates West LLC; 2024-10-22 to current/open; source msha-controller-operator-history