# Relationship history for MSHA mine 2002472

Current hierarchy: **Angelo E  Iafrate → Angelo'S Crushed Concrete Inc → MUIR ROAD PIT**

- 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 → MUIR ROAD PIT; 1950-01-01 to 1990-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Portable Aggregate Producers Inc → MUIR ROAD PIT; 1979-01-01 to 1990-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Bruce G Weber → Portable Aggregate Producers Inc; 1979-01-01 to 1990-03-28; source msha-controller-operator-history
- **controller_controls_mine:** CSR Ltd → MUIR ROAD PIT; 1990-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Aggregates Of Michigan → MUIR ROAD PIT; 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 → MUIR ROAD PIT; 1997-05-31 to 1998-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Edward C  Levy Jr et al → MUIR ROAD PIT; 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 1998-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Angelo E  Iafrate  et al → MUIR ROAD PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Angelo'S Crushed Concrete Inc → MUIR ROAD PIT; 1998-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angelo E  Iafrate  et al → Angelo'S Crushed Concrete Inc; 1998-03-09 to current/open; source msha-controller-operator-history