# Relationship history for MSHA mine 2602593

Current hierarchy: **ARPL Tecnolgia Industrial S A → RMI Operating Company, LLC → Lee Canyon Sand & Gravel Pit**

- 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:** Meadow Valley Corp → Lee Canyon Sand & Gravel Pit; 1996-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ready Mix Inc → Lee Canyon Sand & Gravel Pit; 2006-04-10 to 2010-04-01; source msha-controller-operator-history
- **controller_controls_operator:** Meadow Valley Corp → Ready Mix Inc; 2006-04-10 to 2010-04-01; source msha-controller-operator-history
- **controller_controls_mine:** ARPL Tecnolgia Industrial S A → Lee Canyon Sand & Gravel Pit; 2010-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** RMI Operating Company, LLC → Lee Canyon Sand & Gravel Pit; 2010-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ARPL Tecnolgia Industrial S A → RMI Operating Company, LLC; 2010-04-02 to current/open; source msha-controller-operator-history