# Relationship history for MSHA mine 0900737

Current hierarchy: **Construction Partners Inc → Scruggs Company → Montgomery 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:** Montgomery Sand Company → Montgomery Sand Mine; 1950-01-01 to 1990-11-08; source msha-controller-operator-history
- **controller_controls_mine:** John  Mason → Montgomery Sand Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Mason → Montgomery Sand Company; 1950-01-01 to 1990-11-08; source msha-controller-operator-history
- **controller_controls_mine:** F Ferrell  Scruggs Jr → Montgomery Sand Mine; 1950-01-01 to 2018-05-14; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Montgomery Sand Mine; 1982-10-27 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** F Browne Gregg Trust → Montgomery Sand Mine; 1989-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montgomery Sand Company → Montgomery Sand Mine; 1990-11-09 to 2000-07-21; source msha-controller-operator-history
- **controller_controls_operator:** F Browne Gregg Trust → Montgomery Sand Company; 1990-11-09 to 2000-07-21; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Montgomery Sand Mine; 2000-07-01 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Rinker Materials Of Florida Inc → Montgomery Sand Mine; 2000-07-22 to 2003-06-30; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Rinker Materials Of Florida Inc; 2000-07-22 to 2003-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → Montgomery 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 2003-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Florida Crushed Stone → Montgomery Sand Mine; 2003-07-01 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Florida Crushed Stone; 2003-07-01 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Florida Crushed Stone; 2003-07-01 to 2003-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Scruggs Company → Montgomery Sand Mine; 2004-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** F Ferrell  Scruggs Jr → Scruggs Company; 2004-10-01 to 2018-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → Montgomery 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 2003-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Florida Crushed Stone; 2007-07-10 to 2004-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Construction Partners Inc → Montgomery Sand Mine; 2018-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Construction Partners Inc → Scruggs Company; 2018-05-15 to current/open; source msha-controller-operator-history