# Relationship history for MSHA mine 4503381

Current hierarchy: **Cemex S A → Cemex Construction Materials Pacific LLC → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** CSR Ltd → Portable Crusher; 1988-07-20 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Portable Crusher; 1990-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Csr Associated → Portable Crusher; 1998-12-01 to 2001-09-30; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Csr Associated; 1998-12-01 to 2001-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials → Portable Crusher; 2001-10-01 to 2009-04-15; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials; 2001-10-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Portable Crusher; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Portable Crusher; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials; 2007-07-10 to 2009-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Portable Crusher; 2008-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Construction Materials Pacific LLC → Portable Crusher; 2009-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Construction Materials Pacific LLC; 2009-04-16 to current/open; source msha-controller-operator-history