# Relationship history for MSHA mine 2602590

Current hierarchy: **Cemex S A → Rinker Materials West, LLC → El Dorado / 1893 Portable Crusher**

- 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:** CSR Ltd → El Dorado / 1893 Portable Crusher; 1990-02-02 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → El Dorado / 1893 Portable Crusher; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials West, LLC → El Dorado / 1893 Portable Crusher; 2006-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials West, LLC; 2006-04-06 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials West, LLC; 2006-04-06 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → El Dorado / 1893 Portable Crusher; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials West, LLC; 2007-07-10 to current/open; source msha-controller-operator-history