# Relationship history for MSHA mine 4502666

Current hierarchy: **CSR Ltd → Csr Associated Sand & Gravel Company Inc → PORTABLE #2**

- 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:** Mario A  Segale et al → PORTABLE #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Gold Fields Limited → PORTABLE #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M A Segale Inc → PORTABLE #2; 1979-01-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Mario A  Segale et al → M A Segale Inc; 1979-01-01 to 1985-09-02; source msha-controller-operator-history
- **controller_controls_operator:** Mark A  Segale et al → M A Segale Inc; 1979-01-01 to 1985-09-02; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → PORTABLE #2; 1985-09-03 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → Associated Sand & Gravel Company Inc; 1985-09-03 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → PORTABLE #2; 1989-03-14 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Associated Sand & Gravel Company Inc → PORTABLE #2; 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:** Csr Associated Sand & Gravel Company Inc → PORTABLE #2; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → PORTABLE #2; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → Csr Associated Sand & Gravel Company Inc; 1990-02-02 to current/open; source msha-controller-operator-history