# Relationship history for MSHA mine 0801000

Current hierarchy: **Cemex S A → CEMEX Construction Materials Florida, LLC → 474 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** F Browne Gregg Trust → 474 Sand Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → 474 Sand Mine; 1982-10-27 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Florida Crushed Stone Company → 474 Sand Mine; 1983-04-01 to 1990-12-02; source msha-controller-operator-history
- **controller_controls_operator:** F Browne Gregg Trust → Florida Crushed Stone Company; 1983-04-01 to 1990-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials of Florida Inc → 474 Sand Mine; 1990-12-03 to 2008-12-18; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials of Florida Inc; 1990-12-03 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → 474 Sand Mine; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials of Florida Inc; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → 474 Sand Mine; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials of Florida Inc; 2007-07-10 to 2008-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → 474 Sand Mine; 2008-12-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Florida, LLC → 474 Sand Mine; 2008-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → CEMEX Construction Materials Florida, LLC; 2008-12-19 to current/open; source msha-controller-operator-history