# Relationship history for MSHA mine 3304821

Current hierarchy: **CRH PLC → SHELLY MATERIALS → SHELLY ROSEVILLE**

- 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:** CRH PLC → SHELLY ROSEVILLE; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Shelly Materials → SHELLY ROSEVILLE; 2026-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Shelly Materials; 2026-02-05 to current/open; source msha-controller-operator-history