# Relationship history for MSHA mine 4202272

Current hierarchy: **Cemex S A → Cemex → Beaver 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** James E  Robinson → Beaver Plant; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Beaver Plant; 1990-02-02 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** J R Ready Mix Inc → Beaver Plant; 2000-02-01 to 2007-01-10; source msha-controller-operator-history
- **controller_controls_operator:** James E  Robinson → J R Ready Mix Inc; 2000-02-01 to 2007-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Beaver Plant; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Cemex → Beaver Plant; 2007-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Cemex; 2007-01-11 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Cemex; 2007-01-11 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Beaver Plant; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex; 2007-07-10 to current/open; source msha-controller-operator-history