# Relationship history for MSHA mine 0801436

Current hierarchy: **Cemex SA; Barron Collier Companies → Immokalee Sand, LLC → Immokalee Sand 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Immokalee Sand, LLC → Immokalee Sand Mine; 2021-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cemex SA et al → Immokalee Sand Mine; 2021-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex SA et al → Immokalee Sand, LLC; 2021-08-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barron Collier Companies et al → Immokalee Sand, LLC; 2021-08-05 to current/open; source msha-controller-operator-history