# Relationship history for MSHA mine 2003029

Current hierarchy: **Great Lakes Aggregates LLC → RECYCLED AGGREGATES LLC → OXFORD SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Angelo'S Crushed Concrete Inc → OXFORD SAND & GRAVEL; 1997-08-01 to 2004-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Angelo E  Iafrate  et al → OXFORD SAND & GRAVEL; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angelo E  Iafrate  et al → Angelo'S Crushed Concrete Inc; 1997-08-01 to 2004-03-14; source msha-controller-operator-history
- **operator_operates_mine:** RECYCLED AGGREGATES LLC → OXFORD SAND & GRAVEL; 2004-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Great Lakes Aggregates LLC → OXFORD SAND & GRAVEL; 2004-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Great Lakes Aggregates LLC → RECYCLED AGGREGATES LLC; 2004-03-15 to current/open; source msha-controller-operator-history