# Relationship history for MSHA mine 0900415

Current hierarchy: **Cemex S A → Rinker Materials Of Florida Incorporated → Augusta 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

- **operator_operates_mine:** Southern Aggregates Inc → Augusta Sand Mine; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **controller_controls_mine:** Claussen Paving Company → Augusta Sand Mine; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **controller_controls_operator:** Claussen Paving Company → Southern Aggregates Inc; 1950-01-01 to 1982-10-26; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials Of Florida Incorporated → Augusta Sand Mine; 1982-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Augusta Sand Mine; 1982-10-27 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials Of Florida Incorporated; 1982-10-27 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Augusta Sand Mine; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Rinker Materials Of Florida Incorporated; 2003-04-01 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Augusta Sand Mine; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Rinker Materials Of Florida Incorporated; 2007-07-10 to current/open; source msha-controller-operator-history