# Relationship history for MSHA mine 2002529

Current hierarchy: **Edward C  Levy Jr → American Aggregates Of Michigan Inc → Ray Road Plant**

- 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:** Bruce G Weber → Ray Road Plant; 1950-01-01 to 1990-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Portable Aggregate Producers Inc → Ray Road Plant; 1980-02-01 to 1990-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Bruce G Weber → Portable Aggregate Producers Inc; 1980-02-01 to 1990-03-28; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → Ray Road Plant; 1990-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Of Michigan → Ray Road Plant; 1990-03-29 to 1997-05-30; source msha-controller-operator-history
- **controller_controls_operator:** CSR Ltd → American Aggregates Of Michigan; 1990-03-29 to 1997-05-30; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Of Michigan Inc → Ray Road Plant; 1997-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward C  Levy Jr et al → Ray Road Plant; 1997-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward C  Levy Jr et al → American Aggregates Of Michigan Inc; 1997-05-31 to current/open; source msha-controller-operator-history