# Relationship history for MSHA mine 4703731

Current hierarchy: **1442246 AB Ltd → CSI Sands (Wisconsin) Ltd. → CSI Rossa Mine**

- 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:** CSI Sands (Wisconsin) Ltd. → CSI Rossa Mine; 2014-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** 1442246 AB Ltd → CSI Rossa Mine; 2014-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** 1442246 AB Ltd → CSI Sands (Wisconsin) Ltd.; 2014-11-24 to current/open; source msha-controller-operator-history