# Relationship history for MSHA mine 2003031

Current hierarchy: **Angelo E  Iafrate → Angelo'S Crushed Concrete Inc → WHITE LAKE 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

- **operator_operates_mine:** Angelo'S Crushed Concrete Inc → WHITE LAKE PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Angelo E  Iafrate  et al → WHITE LAKE PIT; 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 current/open; source msha-controller-operator-history