# Relationship history for MSHA mine 5001198

Current hierarchy: **CSR Ltd → Associated Sand & Gravel Company Inc → Southeast Portable Crusher**

- 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:** Consolidated Gold Fields Limited → Southeast Portable Crusher; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Berglund Trucking → Southeast Portable Crusher; 1950-01-01 to 1978-09-25; source msha-controller-operator-history
- **controller_controls_mine:** Berglund Trucking → Southeast Portable Crusher; 1950-01-01 to 1978-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Berglund Trucking → Berglund Trucking; 1950-01-01 to 1978-09-25; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → Southeast Portable Crusher; 1978-09-26 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → Associated Sand & Gravel Company Inc; 1978-09-26 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Southeast Portable Crusher; 1989-03-14 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → Southeast Portable Crusher; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Associated Sand & Gravel Company Inc; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → Southeast Portable Crusher; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Southeast Portable Crusher; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Associated Sand & Gravel Company Inc; 1990-02-02 to current/open; source msha-controller-operator-history