# Relationship history for MSHA mine 2000662

Current hierarchy: **CSR Ltd → American Aggregates Of Michigan → Brighton Plant #810**

- 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:** American Aggregates Corp → Brighton Plant #810; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** American Aggregates Corp → Brighton Plant #810; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Aggregates Corp → American Aggregates Corp; 1950-01-01 to 1987-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Consolidated Gold Fields Limited → Brighton Plant #810; 1987-02-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Corp → Brighton Plant #810; 1987-03-01 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_operator:** Consolidated Gold Fields Limited → American Aggregates Corp; 1987-03-01 to 1989-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Brighton Plant #810; 1989-03-10 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Corp → Brighton Plant #810; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → American Aggregates Corp; 1989-08-10 to 1990-02-01; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Of Michigan → Brighton Plant #810; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Brighton Plant #810; 1990-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → American Aggregates Of Michigan; 1990-02-02 to current/open; source msha-controller-operator-history