# Relationship history for MSHA mine 0400281

Current hierarchy: **Cemex S A → CEMEX Construction Materials Pacific, LLC → Victorville Cement Plant**

- 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:** Southdown California Cement Llc → Victorville Cement Plant; 1950-01-01 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Southdown Inc → Victorville Cement Plant; 1950-01-01 to 2000-11-02; source msha-controller-operator-history
- **controller_controls_operator:** Southdown Inc → Southdown California Cement Llc; 1950-01-01 to 2000-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Cemex California Cement LLC → Victorville Cement Plant; 2000-11-03 to 2009-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Victorville Cement Plant; 2000-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex California Cement LLC; 2000-11-03 to 2009-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Victorville Cement Plant; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Pacific, LLC → Victorville Cement Plant; 2010-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Pacific, LLC; 2010-01-01 to current/open; source msha-controller-operator-history