# Relationship history for MSHA mine 3800127

Current hierarchy: **Cemex S A → CEMEX Construction Materials Florida, LLC → DEERFIELD SAND**

- 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:** Deerfield Sand & Mining Company Inc → DEERFIELD SAND; 1950-01-01 to 1988-07-27; source msha-controller-operator-history
- **controller_controls_mine:** W Perry  Gill → DEERFIELD SAND; 1950-01-01 to 1988-07-27; source msha-controller-operator-history
- **controller_controls_operator:** W Perry  Gill → Deerfield Sand & Mining Company Inc; 1950-01-01 to 1988-07-27; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → DEERFIELD SAND; 1982-10-27 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → DEERFIELD SAND; 1988-07-20 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials Corp → DEERFIELD SAND; 1988-07-28 to 2001-09-30; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials Corp; 1988-07-28 to 2001-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials of FL Inc → DEERFIELD SAND; 2001-10-01 to 2008-12-18; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials of FL Inc; 2001-10-01 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → DEERFIELD SAND; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials Corp; 2003-04-01 to 2001-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials of FL Inc; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → DEERFIELD SAND; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials Corp; 2007-07-10 to 2001-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials of FL Inc; 2007-07-10 to 2008-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → DEERFIELD SAND; 2008-12-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CEMEX Construction Materials Florida, LLC → DEERFIELD SAND; 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